One in every fifteen homes will have a radon problem, on average, in the United States of America. While that doesn’t sound too bad, some areas are a lot more affected by radon than others. Every state in the US has had homes tested that have heightened radon levels, so it would be wise to test your own home’s air to be safe.
Around Portland, Oregon (where I live), for example, one in every four homes has a radon problem, on average. Here it would make complete sense to test for radon. In an area with one in a hundred homes, it might not make as much sense, at least initially, but it would still be wise to test for radon. Test kits can be very cheap, so it can’t hurt to be sure if your home’s air is safe.
The EPA has devoted many hours to compiling tons of data on radon. They’ve made maps, such as the one that you can see here.
Problem is, none of these resources are too easy to understand and/or use.
Plus, lost of them are PDFs that you have to download, and I hate doing that when I’m looking things up online. It just clutters up my phone’s memory more than need be. I’m not about to pull that PDF up later, so why do I need to download it?
With all of that in mind, I’m making the most comprehensive resource for looking up radon problems where you all live (in the US). This project took me a few months from start to finish, so I hope it’s really helpful!
Quick Lookup Tip!
Contents
To speed up your research, you can just look up either your state or your county on this page. To search for something, use one of the options below: (These are all for those on the Chrome browser, but a lot of browsers work in similar ways.) Or you can use my table of contents and scroll through your state!
PC: Ctrl + F (then type in your state or county)
Mac: ⌘ + F (then type in your state or county)
Android: Hit the three dots in the top right, then scroll down to “Find in Page” (then type in your state or county)
Apple: Hit the three dots in the top right, then scroll down to “Find in Page” (then type in your state or county)
Before You Go On…
Now, before you decide against running a radon test for your own home, please note that the EPA recommends that everyone test their home’s air for radon. That test can be as simple as picking up a one-off radon test, like this one that you can pick up on Amazon here.
But, if you’d like a more permanent testing system for radon, I highly recommend AirThings’ Corentium radon detector that will check your home’s radon levels for years to come. It’s super easy to use and helps ensure that the air I’m breathing isn’t about to kill me. You can pick up one of these radon detectors here from AirThings’ store. Use the code ape10-10off to get a ten percent discount on your purchase. Or, if you’d rather order on Amazon, you can use this link, but you won’t get ten percent off.
*Please note that all the data that is included below was taken from the EPA, state and county websites, and from radon.com. Data is current as of this article’s posting 11.03.2021.
How to Use This Data:
Alright, so there are a TON of numbers, so let me tell you what to look for.
The higher the EPA zone level, the better. In the higher levels, you are less likely to have a radon problem in your home. For instance, in zone three (the lowest EPA score for radon), you should be able to get along fine with just running a radon test with one of the cheaper one-off test kits. In zone one, radon is a proven issue in your county and you might want to buy a radon detector, as that will allow you to check for radon levels as long as you have it (and it has batteries).
Additionally, the Average Radon Level should be as low as possible. As with golf, lower is better. If you see a number above 1.3, that means that that county’s radon levels are above the national average. If you see a number above 4, then that’s really high and you need to get a radon test done as soon as possible. (But you should test regardless, as per the EPA’s guidelines.)
Is Radon a Problem in Alabama?
Radon is indeed a problem in the state of Alabama. The average level for radon in Alabama is 3.9 pCi/L which is much higher than the national average of 1.3 pCi/L. Radon is a problem in Alabama, just like it is in every US state. Fifteen different counties in Alabama have been flagged by the EPA for having higher levels of radon than what is common. These counties include Calhoun, Clay, Cleburne, Colbert, Coosa, Franklin, Jackson, Jefferson, Lauderdale, Lawrence, Limestone, Madison, Morgan, Shelby, and Talladega.
If you live in any of these counties, please run a radon test as soon as you can. You can do these yourself, or you can hire professionals. If you choose to run your own radon test, please visit this article to read about and pick up either the radon test kit that we recommend or our favorite radon detectors.
There are 33 counties that are in the EPA’s Zone Two (radon levels between 2-4 pCi/L) range, which is an area where radon is still a problem, but is not quite as bad as it is in the Zone One areas. It’s recommended that you test your home’s air for radon if you’re in a Zone Two area.
Finally, there are 21 counties that the EPA classified as Zone Three (radon levels between 0-1.9 pCi/L) range. Radon is more of a minor issue in these counties, but that does not necessarily mean that you’re out of the woods. There are plenty of counties that the EPA said are Zone Ones that tested out and have some really high average radon levels. There are plenty of homes that have really high levels of radon sprinkled throughout the whole nation. The only way to find out if your home has a radon issue is to test for it.
At the end of the day, counties that are marked as Zone One by the EPA have an increased risk of having a radon problem that’s really high, areas that are Zone Two mave a higher risk of having a mid-level radon threat, and Zone One counties have the lowest risk. Whatever zoning you’re in, it’s wisest to test for radon in your home. The zone designations serve as more of an idea on what you might be able to expect from your radon test results.
Here’s a county by county breakdown of Alabama’s radon levels, as per the EPA and radon.com. If you’d like to see a more in-depth breakdown of the information presented, then you can do so on our article here.
| County Name | EPA Zone Designation (1=High, 2=Mid, 3=Low) | Average Radon Level (pCi/L) | Is Radon a Problem in this County? |
|---|---|---|---|
| Autauga | Zone Two (Mid) | 1.4 | Radon is a problem in Autauga County |
| Baldwin | Zone Three (Low) | 1.3 | Radon is a minor problem in Baldwin County |
| Barbour | Zone Two (Mid) | 0.4 | Radon is a problem in Barbour County |
| Bibb | Zone Two (Mid) | 2.6 | Radon is a problem in Bibb County |
| Blount | Zone Two (Mid) | 1.3 | Radon is a problem in Blount County |
| Bullock | Zone Two (Mid) | No Data | Radon is a problem in Bullock County |
| Butler | Zone Three (Low) | 0.9 | Radon is a minor problem in Butler County |
| Calhoun | Zone One (High) | 2.2 | Radon is a major problem in Calhoun County |
| Chambers | Zone Three (Low) | 0.3 | Radon is a minor problem in Chambers County |
| Cherokee | Zone Two (Mid) | 1.0 | Radon is a problem in Cherokee County |
| Chilton | Zone Two (Mid) | 2.6 | Radon is a problem in Chilton County |
| Choctaw | Zone Three (Low) | 0.3 | Radon is a minor problem in Choctaw County |
| Clarke | Zone Three (Low) | 1.1 | Radon is a minor problem in Clarke County |
| Clay | Zone One (High) | 2.9 | Radon is a major problem in Clay County |
| Cleburne | Zone One (High) | 2.9 | Radon is a major problem in Cleburne County |
| Coffee | Zone Three (Low) | 1.6 | Radon is a minor problem in Coffee County |
| Colbert | Zone One (High) | 4.3 | Radon is a major problem in Colbert County |
| Conecuh | Zone Three (Low) | 0.6 | Radon is a minor problem in Conecuh County |
| Coosa | Zone One (High) | 2.8 | Radon is a major problem in Coosa County |
| Covington | Zone Three (Low) | 0.6 | Radon is a minor problem in Covington County |
| Crenshaw | Zone Three (Low) | 3.4 | Radon is a problem in Crenshaw County |
| Cullman | Zone Two (Mid) | 1.6 | Radon is a problem in Cullman County |
| Dale | Zone Three (Low) | 0.8 | Radon is a minor problem in Dale County |
| Dallas | Zone Two (Mid) | 0.7 | Radon is a problem in Dallas County |
| DeKalb | Zone Two (Mid) | 1.6 | Radon is a problem in DeKalb County |
| Elmore | Zone Two (Mid) | 1.7 | Radon is a problem in Elmore County |
| Escambia | Zone Three (Low) | 0.4 | Radon is a minor problem in Escambia County |
| Etowah | Zone Two (Mid) | 1.5 | Radon is a problem in Etowah County |
| Fayette | Zone Two (Mid) | 1.6 | Radon is a problem in Fayette County |
| Franklin | Zone One (High) | 3.3 | Radon is a major problem in Franklin County |
| Geneva | Zone Three (Low) | 1.0 | Radon is a minor problem in Geneva County |
| Greene | Zone Two (Mid) | 1.0 | Radon is a problem in Greene County |
| Hale | Zone Two (Mid) | 3.4 | Radon is a problem in Hale County |
| Henry | Zone Three (Low) | 1.6 | Radon is a minor problem in Henry County |
| Houston | Zone Three (Low) | 1.4 | Radon is a minor problem in Houston County |
| Jackson | Zone One (High) | 2.3 | Radon is a major problem in Jackson County |
| Jefferson | Zone Two (Mid) | 1.8 | Radon is a problem in Jefferson County |
| Lamar | Zone Two (Mid) | 2.7 | Radon is a problem in Lamar County |
| Lauderdale | Zone One (High) | 3.0 | Radon is a major problem in Lauderdale County |
| Lawrence | Zone One (High) | 2.3 | Radon is a major problem in Lawrence County |
| Lee | Zone Two (Mid) | 0.9 | Radon is a problem in Lee County |
| Limestone | Zone One (High) | 1.7 | Radon is a major problem in Limestone County |
| Lowndes | Zone Two (Mid) | No Data | Radon is a problem in Lowndes County |
| Macon | Zone Two (Mid) | 0.2 | Radon is a problem in Macon County |
| Madison | Zone One (High) | 4.6 | Radon is a major problem in Madison County |
| Marengo | Zone Three (Low) | 1.7 | Radon is a minor problem in Marengo County |
| Marion | Zone Two (Mid) | 2.4 | Radon is a problem in Marion County |
| Marshall | Zone Two (Mid) | 1.5 | Radon is a problem in Marshall County |
| Mobile | Zone Three (Low) | 0.8 | Radon is a minor problem in Mobile County |
| Monroe | Zone Three (Low) | 0.9 | Radon is a minor problem in Monroe County |
| Montgomery | Zone Two (Mid) | 2.3 | Radon is a problem in Montgomery County |
| Morgan | Zone One (High) | 3.1 | Radon is a major problem in Morgan County |
| Perry | Zone Two (Mid) | 14.4 | Radon is an extreme problem in Perry County |
| Pickens | Zone Two (Mid) | 1.3 | Radon is a problem in Pickens County |
| Pike | Zone Three (Low) | 0.9 | Radon is a minor problem in Pike County |
| Randolph | Zone Two (Mid) | 4.5 | Radon is a major problem in Randolph County |
| Russell | Zone Two (Mid) | 0.4 | Radon is a problem in Russell County |
| Saint Clair (St. Clair) | Zone Two (Mid) | 1.9 | Radon is a problem in Saint Clair County |
| Shelby | Zone Two (Mid) | 1.8 | Radon is a problem in Shelby County |
| Sumter | Zone Two (Mid) | 2.3 | Radon is a problem in Sumter County |
| Talladega | Zone One (High) | 1.8 | Radon is a major problem in Talladega County |
| Tallapoosa | Zone Three (Low) | 52.7 | Radon is an extreme problem in Tallapoosa County |
| Tuscaloosa | Zone Two (Mid) | 1.2 | Radon is a problem in Tuscaloosa County |
| Walker | Zone Two (Mid) | 1.5 | Radon is a problem in Walker County |
| Washington | Zone Three (Low) | 0.4 | Radon is a minor problem in Washington County |
| Wilcox | Zone Three (Low) | 4.5 | Radon is a major problem in Wilcox County |
| Winston | Zone Two (Mid) | 1.2 | Radon is a problem in Winston County |
Is Radon a Problem in Alaska?
Radon is a big problem in Alaska. The average level for radon in Alaska is 10.7 pCi/L which is much higher than the national average of 1.3 pCi/L. Radon is a problem in Alaska, just like it is in every US state. While there are no counties in Alaska have been flagged by the EPA for having higher levels of radon than what is common, there are several boroughs that have tested out to have a lot higher levels of radon than the EPA predicted.
If you live in any of these counties, please run a radon test as soon as you can. You can do these yourself, or you can hire professionals. If you choose to run your own radon test, please visit this article to read about and pick up either the radon test kit that we recommend or our favorite radon detectors.
There are 5 counties that are in the EPA’s Zone Two (radon levels between 2-4 pCi/L) range, which is an area where radon is still a problem, but is not quite as bad as it is in the Zone One areas. It’s recommended that you test your home’s air for radon if you’re in a Zone Two area.
Finally, there are 22 counties that the EPA classified as Zone Three (radon levels between 0-1.9 pCi/L) range. Radon is more of a minor issue in these counties, but that does not necessarily mean that you’re out of the woods. There are plenty of counties that the EPA said are Zone Ones that tested out and have some really high average radon levels. There are plenty of homes that have really high levels of radon sprinkled throughout the whole nation. The only way to find out if your home has a radon issue is to test for it.
At the end of the day, counties that are marked as Zone One by the EPA have an increased risk of having a radon problem that’s really high, areas that are Zone Two mave a higher risk of having a mid-level radon threat, and Zone One counties have the lowest risk. Whatever zoning you’re in, it’s wisest to test for radon in your home. The zone designations serve as more of an idea on what you might be able to expect from your radon test results.
Here’s a borough by borough breakdown of Alaska’s radon levels, as per the EPA and radon.com. If you’d like to see an in-depth breakdown of the data below, then you can do so on our article here.
| Borough Name | EPA Zone Designation (1=High, 2=Mid, 3=Low) | Average Radon Level (pCi/L) | Is Radon a Problem in this County? |
|---|---|---|---|
| Aleutians East | Zone Three (Low) | No Data | Radon is a minor problem in Aleutians East Borough |
| Aleutians West | Zone Three (Low) | No Data | Radon is a minor problem in Aleutians West Borough |
| Anchorage | Zone Two (Mid) | 1.6 | Radon is a problem in Anchorage Borough |
| Bethel | Zone Three (Low) | No Data | Radon is a minor problem in Bethel Borough |
| Bristol Bay | Zone Three (Low) | 0.7 | Radon is a minor problem in Bristol Bay Borough |
| Denali | Zone Three (Low) | 6.7 | Radon is a major problem in Denali Borough |
| Dillingham | Zone Three (Low) | 2.1 | Radon is a problem in Dillingham Borough |
| Fairbanks North Star | Zone Two (Mid) | 15.6 | Radon is an extreme problem in Fairbanks North Star Borough |
| Haines | Zone Three (Low) | 13.5 | Radon is an extreme problem in Haines Borough |
| Juneau | Zone Three (Low) | 2.2 | Radon is a problem in Juneau Borough |
| Kenai Peninsula | Zone Two (Mid) | 2.7 | Radon is a problem in Kenai Peninsula Borough |
| Ketchikan Gateway | Zone Three (Low) | 0.5 | Radon is a minor problem in Ketchikan Gateway Borough |
| Kodiak Island | Zone Three (Low) | 2.9 | Radon is a problem in Kodiak Island Borough |
| Lake and Peninsula | Zone Three (Low) | No Data | Radon is a problem in Lake and Peninsula Borough |
| Matanuska Susitna | Zone Two (Mid) | 4.3 | Radon is a major problem in Matanuska Susitna Borough |
| Nome | Zone Three (Low) | 6.4 | Radon is a major problem in Nome Borough |
| North Slope | Zone Three (Low) | 0.2 | Radon is a minor problem in North Slope Borough |
| Northwest Arctic | Zone Three (Low) | 0.3 | Radon is a minor problem in Northwest Arctic Borough |
| Prince Wales Ketchikan | Zone Three (Low) | 0.7 | Radon is a minor problem in Prince Wales Ketchikan Borough |
| Sitka | Zone Three (Low) | 0.2 | Radon is a minor problem in Sitka Borough |
| Skagway Hoonah Angoon | Zone Three (Low) | 0.1 | Radon is a minor problem in Skagway Hoonah Angoon Borough |
| Southeast Fairbanks | Zone Two (Mid) | 5.3 | Radon is a major problem in Southeast Fairbanks Borough |
| Valdez Cordova | Zone Three (Low) | 2.9 | Radon is a problem in Valdez Cordova Borough |
| Wade Hampton | Zone Three (Low) | 0.5 | Radon is a minor problem in Wade Hampton Borough |
| Wrangell Petersburg | Zone Three (Low) | 0.5 | Radon is a minor problem in Wrangell Petersburg Borough |
| Yakutat | Zone Three (Low) | No Data | Radon is a minor problem in Yakutat Borough |
| Yukon Koyukuk | Zone Three (Low) | 4.1 | Radon is a major problem in Yukon Koyukuk Borough |
Is Radon a Problem in Arizona?
Radon is indeed a problem in the state of Arizona. The average level for radon in Arizona is 1.9 pCi/L which is marginally higher than the national average of 1.3 pCi/L. Radon is a problem in Arizona, just like it is in every US state. While no counties in Arizona have been flagged by the EPA for having higher levels of radon than what is common, every county is in the EPA’s Zone Two, which means radon gas is still a concern.
If you live in any of these counties, please run a radon test as soon as you can. You can do these yourself, or you can hire professionals. If you choose to run your own radon test, please visit this article to read about and pick up either the radon test kit that we recommend or our favorite radon detectors.
There are 15 counties that are in the EPA’s Zone Two (radon levels between 2-4 pCi/L) range, which is an area where radon is still a problem, but is not quite as bad as it is in the Zone One areas. It’s recommended that you test your home’s air for radon if you’re in a Zone Two area.
Finally, there aren’t any counties that the EPA classified as Zone Three (radon levels between 0-1.9 pCi/L) range. Some counties do have lower radon levels on average, but it’s still recommended to test for radon in your home.
At the end of the day, counties that are marked as Zone One by the EPA have an increased risk of having a radon problem that’s really high, areas that are Zone Two mave a higher risk of having a mid-level radon threat, and Zone One counties have the lowest risk. Whatever zoning you’re in, it’s wisest to test for radon in your home. The zone designations serve as more of an idea on what you might be able to expect from your radon test results.
Here’s a county by county breakdown of Arizona’s radon levels, as per the EPA and radon.com. If you’d like to see take a deeper look at what this data means, then you can do so on our article here.
| County Name | EPA Zone Designation (1=High, 2=Mid, 3=Low) | Average Radon Level (pCi/L) | Is Radon a Problem in this County? |
|---|---|---|---|
| Apache | Zone Two (Mid) | 0.9 | Radon is a problem in Apache County |
| Cochise | Zone Two (Mid) | 3.6 | Radon is a problem in Cochise County |
| Coconino | Zone Two (Mid) | 4.7 | Radon is a major problem in Coconino County |
| Gila | Zone Two (Mid) | 2.5 | Radon is a problem in Gila County |
| Graham | Zone Two (Mid) | 1.8 | Radon is a problem in Graham County |
| Greenlee | Zone Two (Mid) | 3.3 | Radon is a problem in Greenlee County |
| La Paz | Zone Two (Mid) | 0.8 | Radon is a problem in La Paz County |
| Maricopa | Zone Two (Mid) | 2.1 | Radon is a problem in Maricopa County |
| Mohave | Zone Two (Mid) | 1.6 | Radon is a problem in Mohave County |
| Navajo | Zone Two (Mid) | 1.3 | Radon is a problem in Navajo County |
| Pima | Zone Two (Mid) | 1.7 | Radon is a problem in Pima County |
| Pinal | Zone Two (Mid) | 1.4 | Radon is a problem in Pinal County |
| Santa Cruz | Zone Two (Mid) | 1.6 | Radon is a problem in Santa Cruz County |
| Yavapai | Zone Two (Mid) | 2.9 | Radon is a problem in Yavapai County |
| Yuma | Zone Two (Mid) | 0.8 | Radon is a problem in Yuma County |
Is Radon a Problem in Arkansas?
Radon is indeed a problem in the state of Arkansas. The average level for radon in Arkansas is 2.5 pCi/L which is almost double the national average of 1.3 pCi/L. Radon is a problem in Arkansas, just like it is in every US state. While there are no counties in Arkansas that have been flagged by the EPA for having higher levels of radon than what is common, there are several counties that have been shown to have dangerously high levels of the radioactive gas, radon.
If you live in any of these counties, please run a radon test as soon as you can. You can do these yourself, or you can hire professionals. If you choose to run your own radon test, please visit this article to read about and pick up either the radon test kit that we recommend or our favorite radon detectors.
There are 61 counties that are in the EPA’s Zone Two (radon levels between 2-4 pCi/L) range, which is an area where radon is still a problem, but is not quite as bad as it is in the Zone One areas. It’s recommended that you test your home’s air for radon if you’re in a Zone Two area.
Finally, there are 21 counties that the EPA classified as Zone Three (radon levels between 0-1.9 pCi/L) range. Radon is more of a minor issue in these counties, but that does not necessarily mean that you’re out of the woods. There are plenty of counties that the EPA said are Zone Ones that tested out and have some really high average radon levels. There are plenty of homes that have really high levels of radon sprinkled throughout the whole nation. The only way to find out if your home has a radon issue is to test for it.
At the end of the day, counties that are marked as Zone One by the EPA have an increased risk of having a radon problem that’s really high, areas that are Zone Two mave a higher risk of having a mid-level radon threat, and Zone One counties have the lowest risk. Whatever zoning you’re in, it’s wisest to test for radon in your home. The zone designations serve as more of an idea on what you might be able to expect from your radon test results.
Here’s a county by county breakdown of Arkansas’ radon levels, as per the EPA and radon.com. If you would like to take a deeper look at what the data means, then you can do so on our article here.
| County Name | EPA Zone Designation (1=High, 2=Mid, 3=Low) | Average Radon Level (pCi/L) | Is Radon a Problem in this County? |
|---|---|---|---|
| Arkansas | Zone Three (Low) | No Data | Radon is a minor problem in Arkansas County |
| Ashley | Zone Three (Low) | 2.4 | Radon is a problem in Ashley County |
| Baxter | Zone Two (Mid) | 4.3 | Radon is a major problem in Baxter County |
| Benton | Zone Two (Mid) | 5.2 | Radon is a major problem in Benton County |
| Boone | Zone Two (Mid) | 3.0 | Radon is a problem in Boone County |
| Bradley | Zone Three (Low) | No Data | Radon is a minor problem in Bradley County |
| Calhoun | Zone Three (Low) | No Data | Radon is a minor problem in Calhoun County |
| Carroll | Zone Two (Mid) | 4.3 | Radon is a major problem in Carroll County |
| Chicot | Zone Three (Low) | 0.8 | Radon is a minor problem in Chicot County |
| Clark | Zone Three (Low) | 1.3 | Radon is a minor problem in Clark County |
| Clay | Zone Three (Low) | 0.5 | Radon is a minor problem in Clay County |
| Cleburne | Zone Three (Low) | 1.5 | Radon is a minor problem in Cleburne County |
| Cleveland | Zone Three (Low) | 4.4 | Radon is a major problem in Cleveland County |
| Columbia | Zone Three (Low) | 1.9 | Radon is a minor problem in Columbia County |
| Conway | Zone Three (Low) | 2.0 | Radon is a problem in Conway County |
| Craighead | Zone Three (Low) | 1.9 | Radon is a minor problem in Craighead County |
| Crawford | Zone Three (Low) | 1.2 | Radon is a minor problem in Crawford County |
| Crittenden | Zone Three (Low) | 2.1 | Radon is a problem in Crittenden County |
| Cross | Zone Three (Low) | No Data | Radon is a minor problem in Cross County |
| Dallas | Zone Three (Low) | 1.2 | Radon is a minor problem in Dallas County |
| Desha | Zone Three (Low) | No Data | Radon is a minor problem in Desha County |
| Drew | Zone Three (Low) | 0.8 | Radon is a minor problem in Drew County |
| Faulkner | Zone Three (Low) | 1.3 | Radon is a minor problem in Faulkner County |
| Franklin | Zone Three (Low) | 0.6 | Radon is a minor problem in Franklin County |
| Fulton | Zone Two (Mid) | 4.0 | Radon is a major problem in Fulton County |
| Garland | Zone Two (Mid) | 3.9 | Radon is a problem in Garland County |
| Grant | Zone Three (Low) | No Data | Radon is a minor problem in Grant County |
| Greene | Zone Three (Low) | 1.5 | Radon is a minor problem in Greene County |
| Hempstead | Zone Three (Low) | 0.5 | Radon is a minor problem in Hempstead County |
| Hot Spring | Zone Three (Low) | No Data | Radon is a minor problem in Hot Spring County |
| Howard | Zone Three (Low) | 2.1 | Radon is a problem in Howard County |
| Independence | Zone Two (Mid) | 1.7 | Radon is a problem in Independence County |
| Izard | Zone Two (Mid) | 3.5 | Radon is a problem in Izard County |
| Jackson | Zone Three (Low) | 1.5 | Radon is a minor problem in Jackson County |
| Jefferson | Zone Three (Low) | 0.6 | Radon is a minor problem in Jefferson County |
| Johnson | Zone Three (Low) | 1.9 | Radon is a minor problem in Johnson County |
| Lafayette | Zone Three (Low) | No Data | Radon is a minor problem in Lafayette County |
| Lawrence | Zone Three (Low) | 3.0 | Radon is a problem in Lawrence County |
| Lee | Zone Three (Low) | No Data | Radon is a minor problem in Lee County |
| Lincoln | Zone Three (Low) | No Data | Radon is a minor problem in Lincoln County |
| Little River | Zone Three (Low) | 0.8 | Radon is a minor problem in Little River County |
| Logan | Zone Three (Low) | 2.5 | Radon is a problem in Logan County |
| Lonoke | Zone Three (Low) | 0.8 | Radon is a minor problem in Lonoke County |
| Madison | Zone Three (Low) | 2.9 | Radon is a problem in Madison County |
| Marion | Zone Two (Mid) | 1.4 | Radon is a problem in Marion County |
| Miller | Zone Three (Low) | 0.8 | Radon is a minor problem in Miller County |
| Mississippi | Zone Three (Low) | 0.8 | Radon is a minor problem in Mississippi County |
| Monroe | Zone Three (Low) | 2.8 | Radon is a problem in Monroe County |
| Montgomery | Zone Two (Mid) | 2.5 | Radon is a problem in Montgomery County |
| Nevada | Zone Three (Low) | No Data | Radon is a minor problem in Nevada County |
| Newton | Zone Three (Low) | 21.8 | Radon is an extreme problem in Newton County |
| Ouachita | Zone Three (Low) | 0.8 | Radon is a minor problem in Ouachita County |
| Perry | Zone Three (Low) | 2.5 | Radon is a problem in Perry County |
| Phillips | Zone Three (Low) | No Data | Radon is a minor problem in Phillips County |
| Pike | Zone Three (Low) | 0.8 | Radon is a minor problem in Pike County |
| Poinsett | Zone Three (Low) | 0.7 | Radon is a minor problem in Poinsett County |
| Polk | Zone Three (Low) | 5.4 | Radon is a major problem in Polk County |
| Pope | Zone Three (Low) | 0.6 | Radon is a minor problem in Pope County |
| Prairie | Zone Three (Low) | No Data | Radon is a minor problem in Prairie County |
| Pulaski | Zone Three (Low) | 1.4 | Radon is a minor problem in Pulaski County |
| Randolph | Zone Two (Mid) | 0.4 | Radon is a problem in Randolph County |
| Saint Francis (St. Francis) | Zone Three (Low) | 1.0 | Radon is a minor problem in Saint Francis County |
| Saline | Zone Three (Low) | 1.6 | Radon is a minor problem in Saline County |
| Scott | Zone Three (Low) | 16.9 | Radon is an extreme problem in ScottCounty |
| Searcy | Zone Two (Mid) | 2.6 | Radon is a problem in Searcy County |
| Sebastian | Zone Three (Low) | 1.0 | Radon is a minor problem in Sebastian County |
| Sevier | Zone Three (Low) | 1.9 | Radon is a minor problem in Sevier County |
| Sharp | Zone Two (Mid) | 4.3 | Radon is a major problem in Sharp County |
| Stone | Zone Two (Mid) | 0.9 | Radon is a problem in Stone County |
| Union | Zone Three (Low) | 0.2 | Radon is a minor problem in Union County |
| Van Buren | Zone Three (Low) | 2.1 | Radon is a problem in Van Buren County |
| Washington | Zone Three (Low) | 1.2 | Radon is a minor problem in Washington County |
| White | Zone Three (Low) | 1.9 | Radon is a minor problem in White County |
| Woodruff | Zone Three (Low) | No Data | Radon is a minor problem in Woodruff County |
| Yell | Zone Three (Low) | No Data | Radon is a minor problem in Yell County |
Is Radon a Problem in California?
Radon is a noteworthy problem in the state of California. The average level for radon in California is 2.3 pCi/L which is higher than the national average of 1.3 pCi/L. Radon is a problem in California, just like it is in every US state. Just two counties in California have been flagged by the EPA for having higher levels of radon than what is common, but tests show that radon is a major issue in several additional counties. These counties are Santa Barbara and Ventura.
If you live in either of these counties, please run a radon test as soon as you can. You can do these yourself, or you can hire professionals. If you choose to run your own radon test, please visit this article to read about and pick up either the radon test kit that we recommend or our favorite radon detectors. Again, these two aren’t the only counties that have problems, but they are the two that the EPA made note of.
There are 30 counties that are in the EPA’s Zone Two (radon levels between 2-4 pCi/L) range, which is an area where radon is still a problem, but is not quite as bad as it is in the Zone One areas. It’s recommended that you test your home’s air for radon if you’re in a Zone Two area.
Finally, there are 26 counties that the EPA classified as Zone Three (radon levels between 0-1.9 pCi/L) range. Radon is more of a minor issue in these counties, but that does not necessarily mean that you’re out of the woods. There are plenty of counties that the EPA said are Zone Ones that tested out and have some really high average radon levels. There are plenty of homes that have really high levels of radon sprinkled throughout the whole nation. The only way to find out if your home has a radon issue is to test for it.
At the end of the day, counties that are marked as Zone One by the EPA have an increased risk of having a radon problem that’s really high, areas that are Zone Two mave a higher risk of having a mid-level radon threat, and Zone One counties have the lowest risk. Whatever zoning you’re in, it’s wisest to test for radon in your home. The zone designations serve as more of an idea on what you might be able to expect from your radon test results.
Here’s a county by county breakdown of California’s radon levels, as per the EPA and radon.com. To take a look at what the data below means, then you can do so on our article here.
| County Name | EPA Zone Designation (1=High, 2=Mid, 3=Low) | Average Radon Level (pCi/L) | Is Radon a Problem in this County? |
|---|---|---|---|
| Alameda | Zone Two (Mid) | 0.9 | Radon is a problem in Alameda County |
| Alpine | Zone Two (Mid) | 3.2 | Radon is a problem in Alpine County |
| Amador | Zone Two (Mid) | 2.2 | Radon is a problem in Amador County |
| Butte | Zone Three (Low) | 1.6 | Radon is a minor problem in Butte County |
| Calaveras | Zone Two (Mid) | 4.5 | Radon is a major problem in Calaveras County |
| Colusa | Zone Three (Low) | No Data | Radon is a minor problem in Colusa County |
| Contra Costa | Zone Two (Mid) | 1.0 | Radon is a problem in Contra Costa County |
| Del Norte | Zone Three (Low) | 1.8 | Radon is a minor problem in Del Norte County |
| El Dorado | Zone Two (Mid) | 3.8 | Radon is a problem in El Dorado County |
| Fresno | Zone Two (Mid) | 1.9 | Radon is a problem in Fresno County |
| Glenn | Zone Three (Low) | 0.2 | Radon is a minor problem in Glenn County |
| Humboldt | Zone Three (Low) | 1.9 | Radon is a minor problem in Humboldt County |
| Imperial | Zone Three (Low) | 1.4 | Radon is a minor problem in Imperial County |
| Inyo | Zone Two (Mid) | 3.6 | Radon is a problem in Inyo County |
| Kern | Zone Two (Mid) | 3.7 | Radon is a problem in Kern County |
| Kings | Zone Three (Low) | 3.0 | Radon is a problem in Kings County |
| Lake | Zone Three (Low) | 2.4 | Radon is a problem in Lake County |
| Lassen | Zone Three (Low) | 4.3 | Radon is a major problem in Lassen County |
| Los Angeles | Zone Two (Mid) | 2.6 | Radon is a problem in Los Angeles County |
| Madera | Zone Two (Mid) | 2.9 | Radon is a problem in Madera County |
| Marin | Zone Three (Low) | 1.2 | Radon is a minor problem in Marin County |
| Mariposa | Zone Two (Mid) | 2.3 | Radon is a problem in Mariposa County |
| Mendocino | Zone Three (Low) | 2.4 | Radon is a problem in Mendocino County |
| Merced | Zone Three (Low) | 1.7 | Radon is a minor problem in Merced County |
| Modoc | Zone Three (Low) | 1.0 | Radon is a minor problem in Modoc County |
| Mono | Zone Two (Mid) | 4.8 | Radon is a major problem in Mono County |
| Monterey | Zone Two (Mid) | 1.2 | Radon is a problem in Monterey County |
| Napa | Zone Three (Low) | 1.9 | Radon is a minor problem in Napa County |
| Nevada | Zone Two (Mid) | 3.2 | Radon is a problem in Nevada County |
| Orange | Zone Two (Mid) | 1.1 | Radon is a problem in Orange County |
| Placer | Zone Two (Mid) | 1.4 | Radon is a problem in Placer County |
| Plumas | Zone Two (Mid) | 3.8 | Radon is a problem in Plumas County |
| Riverside | Zone Two (Mid) | 1.0 | Radon is a problem in Riverside County |
| Sacramento | Zone Three (Low) | 1.2 | Radon is a minor problem in Sacramento County |
| San Benito | Zone Two (Mid) | 0.9 | Radon is a problem in San Benito County |
| San Bernardino | Zone Two (Mid) | 1.2 | Radon is a problem in San Bernardino County |
| San Diego | Zone Three (Low) | 0.8 | Radon is a minor problem in San Diego County |
| San Francisco | Zone Two (Mid) | 0.5 | Radon is a problem in San Francisco County |
| San Joaquin | Zone Three (Low) | 2.0 | Radon is a problem in San Joaquin County |
| San Luis Obispo | Zone Two (Mid) | 1.4 | Radon is a problem in San Luis Obispo County |
| San Mateo | Zone Two (Mid) | 1.2 | Radon is a problem in San Mateo County |
| Santa Barbara | Zone One (High) | 4.8 | Radon is a major problem in Santa Barbara County |
| Santa Clara | Zone Two (Mid) | 1.3 | Radon is a problem in Santa Clara County |
| Santa Cruz | Zone Two (Mid) | 3.6 | Radon is a problem in Santa Cruz County |
| Shasta | Zone Three (Low) | 1.2 | Radon is a minor problem in Shasta County |
| Sierra | Zone Two (Mid) | 3.1 | Radon is a problem in Sierra County |
| Siskiyou | Zone Three (Low) | 26.8 | Radon is an extreme problem in Siskiyou County |
| Solano | Zone Three (Low) | 0.5 | Radon is a minor problem in Solano County |
| Sonoma | Zone Three (Low) | 1.0 | Radon is a minor problem in Sonoma County |
| Stanislaus | Zone Three (Low) | 1.6 | Radon is a minor problem in Stanislaus County |
| Sutter | Zone Three (Low) | 2.1 | Radon is a problem in Sutter County |
| Tehama | Zone Three (Low) | 0.6 | Radon is a minor problem in Tehama County |
| Trinity | Zone Three (Low) | No Data | Radon is a minor problem in Trinity County |
| Tulare | Zone Two (Mid) | 2.3 | Radon is a problem in Tulare County |
| Tuolumne | Zone Two (Mid) | 2.6 | Radon is a problem in Tuolumne County |
| Ventura | Zone One (High) | 1.3 | Radon is a major problem in Ventura County |
| Yolo | Zone Three (Low) | 0.8 | Radon is a minor problem in Yolo County |
| Yuba | Zone Two (Mid) | 0.4 | Radon is a problem in Yuba County |
Is Radon a Problem in Colorado?
Radon is a big problem in the state of Colorado. In fact, Colorado is one of the most heavily affected states by radon in the US! The average level for radon in Colorado is 6.8 pCi/L which is considerably higher than the national average of 1.3 pCi/L. Radon is a problem in Colorado, just like it is in every US state. 51 different counties in Colorado have been flagged by the EPA for having higher levels of radon than what is common. These counties include Adams, Arapahoe, Baca, Bent, Boulder, Broomfield, Chaffee, Cheyenne, Clear Creek, Crowley, Custer, Delta, Denver, Dolores, Douglas, Elbert, El Paso, Fremont, Garfield, Gilpin, Grand, Gunnison, Huerfano, Jackson, Jefferson, Kiowa, Kit Carson, Lake, Larimer, Las Animas, Lincoln, Logan, Mesa, Moffat, Montezuma, Montrose, Morgan, Otero, Ouray, Park, Phillips, Pitkin, Prowers, Pueblo, Rio Blanco, San Miguel, Sedgwick, Summit, Teller, Washington, Weld, and Yuma.
If you live in any of these counties, please run a radon test as soon as you can. You can do these yourself, or you can hire professionals. If you choose to run your own radon test, please visit this article to read about and pick up either the radon test kit that we recommend or our favorite radon detectors.
There are 12 counties that are in the EPA’s Zone Two (radon levels between 2-4 pCi/L) range, which is an area where radon is still a problem, but is not quite as bad as it is in the Zone One areas. It’s recommended that you test your home’s air for radon if you’re in a Zone Two area.
Finally, there aren’t counties that the EPA classified as Zone Three (radon levels between 0-1.9 pCi/L) range. Homes in zone three counties usually have the lowest levels of radon, but there aren’t any in Colorado. There are plenty of homes that have really high levels of radon sprinkled throughout the whole nation. The only way to find out if your home has a radon issue is to test for it.
At the end of the day, counties that are marked as Zone One by the EPA have an increased risk of having a radon problem that’s really high, areas that are Zone Two have a higher risk of having a mid-level radon threat, and Zone One counties have the lowest risk. Whatever zoning you’re in, it’s wisest to test for radon in your home. The zone designations serve as more of an idea on what you might be able to expect from your radon test results.
Here’s a county by county breakdown of Colorado’s radon levels, as per the EPA and radon.com. If you’d like to read up on what the below data means for your particular county, you can do so on our article here.
| County Name | EPA Zone Designation (1=High, 2=Mid, 3=Low) | Average Radon Level (pCi/L) | Is Radon a Problem in this County? |
|---|---|---|---|
| Adams | Zone One (High) | 3.8 | Radon is a major problem in Adams County |
| Alamosa | Zone Two (Mid) | 2.6 | Radon is a problem in Alamosa County |
| Arapahoe | Zone One (High) | 4.7 | Radon is a major problem in Arapahoe County |
| Archuleta | Zone Two (Mid) | 4.4 | Radon is a major problem in Archuleta County |
| Baca | Zone One (High) | 4.3 | Radon is a major problem in Baca County |
| Bent | Zone One (High) | 5.9 | Radon is a major problem in Bent County |
| Boulder | Zone One (High) | 4.7 | Radon is a major problem in Boulder County |
| Broomfield | Zone One (High) | 4.3 | Radon is a major problem in Broomfield County |
| Chaffee | Zone One (High) | 8.0 | Radon is an extreme problem in Chaffee County |
| Cheyenne | Zone One (High) | 3.6 | Radon is a major problem in Cheyenne County |
| Clear Creek | Zone One (High) | 12.6 | Radon is an extreme problem in Clear Creek County |
| Conejos | Zone Two (Mid) | 3.4 | Radon is a problem in Conejos County |
| Costilla | Zone Two (Mid) | 4.9 | Radon is a major problem in Costilla County |
| Crowley | Zone One (High) | 4.3 | Radon is a major problem in Crowley County |
| Custer | Zone One (High) | 6.0 | Radon is a major problem in Custer County |
| Delta | Zone One (High) | 6.5 | Radon is a major problem in Delta County |
| Denver | Zone One (High) | 3.9 | Radon is a major problem in Denver County |
| Dolores | Zone One (High) | 7.7 | Radon is a major problem in Dolores County |
| Douglas | Zone One (High) | 4.0 | Radon is a major problem in Douglas County |
| Eagle | Zone Two (Mid) | 4.9 | Radon is a major problem in Eagle County |
| Elbert | Zone One (High) | 3.9 | Radon is a major problem in Elbert County |
| El Paso | Zone One (High) | 5.6 | Radon is a major problem in El Paso County |
| Fremont | Zone One (High) | 6.2 | Radon is a major problem in Fremont County |
| Garfield | Zone One (High) | 4.8 | Radon is a major problem in Garfield County |
| Gilpin | Zone One (High) | 9.4 | Radon is an extreme problem in Gilpin County |
| Grand | Zone One (High) | 5.5 | Radon is a major problem in Grand County |
| Gunnison | Zone One (High) | 6.5 | Radon is a major problem in Gunnison County |
| Hinsdale | Zone Two (Mid) | 9.6 | Radon is an extreme problem in Hinsdale County |
| Huerfano | Zone One (High) | 4.6 | Radon is a major problem in Huerfano County |
| Jackson | Zone One (High) | 9.2 | Radon is an extreme problem in Jackson County |
| Jefferson | Zone One (High) | 5.3 | Radon is a major problem in Jefferson County |
| Kiowa | Zone One (High) | 3.7 | Radon is a major problem in Kiowa County |
| Kit Carson | Zone One (High) | 4.8 | Radon is a major problem in Kit Carson County |
| Lake | Zone One (High) | 8.2 | Radon is an extreme problem in Lake County |
| La Plata | Zone Two (Mid) | 6.9 | Radon is a major problem in La Plata County |
| Larimer | Zone One (High) | 6.4 | Radon is a major problem in Larimer County |
| Las Animas | Zone One (High) | 4.2 | Radon is a major problem in Las Animas County |
| Lincoln | Zone One (High) | 4.8 | Radon is a major problem in Lincoln County |
| Logan | Zone One (High) | 4.4 | Radon is a major problem in Logan County |
| Mesa | Zone One (High) | 4.5 | Radon is a major problem in Mesa County |
| Mineral | Zone Two (Mid) | 13.3 | Radon is an extreme problem in Mineral County |
| Moffat | Zone One (High) | 5.5 | Radon is a major problem in Moffat County |
| Montezuma | Zone One (High) | 5.2 | Radon is a major problem in Montezuma County |
| Montrose | Zone One (High) | 8.6 | Radon is an extreme problem in Montrose County |
| Morgan | Zone One (High) | 5.3 | Radon is a major problem in Morgan County |
| Otero | Zone One (High) | 4.0 | Radon is a major problem in Otero County |
| Ouray | Zone One (High) | 7.4 | Radon is a major problem in Ouray County |
| Park | Zone One (High) | 7.3 | Radon is a major problem in Park County |
| Phillips | Zone One (High) | 4.3 | Radon is a major problem in Phillips County |
| Pitkin | Zone One (High) | 7.7 | Radon is a major problem in Pitkin County |
| Prowers | Zone One (High) | 3.6 | Radon is a major problem in Prowers County |
| Pueblo | Zone One (High) | 8.9 | Radon is an extreme problem in Pueblo County |
| Rio Blanco | Zone One (High) | 4.7 | Radon is a major problem in Rio Blanco County |
| Rio Grande | Zone Two (Mid) | 4.6 | Radon is a major problem in Rio Grande County |
| Routt | Zone Two (Mid) | 6.9 | Radon is a major problem in Routt County |
| Saguache | Zone Two (Mid) | 4.4 | Radon is a major problem in Saguache County |
| San Juan | Zone Two (Mid) | 6.5 | Radon is a major problem in San Juan County |
| San Miguel | Zone One (High) | 7.0 | Radon is a major problem in San Miguel County |
| Sedgwick | Zone One (High) | 2.4 | Radon is a major problem in Sedgwick County |
| Summit | Zone One (High) | 8.0 | Radon is an extreme problem in Summit County |
| Teller | Zone One (High) | 12.8 | Radon is an extreme problem in Teller County |
| Washington | Zone One (High) | 5.8 | Radon is a major problem in Washington County |
| Weld | Zone One (High) | 4.3 | Radon is a major problem in Weld County |
| Yuma | Zone One (High) | 3.9 | Radon is a major problem in Yuma County |
Is Radon a Problem in Connecticut?
Radon is indeed a problem in the state of Connecticut. The average level for radon in Connecticut is 3.4 pCi/L which is much higher than the national average of 1.3 pCi/L. Radon is a problem in Connecticut, just like it is in every US state. Four counties in Connecticut have been flagged by the EPA for having higher levels of radon than what is common. These counties include Fairfield, Middlesex, New Haven, and New London.
If you live in any of these counties, please run a radon test as soon as you can. You can do these yourself, or you can hire professionals. If you choose to run your own radon test, please visit this article to read about and pick up either the radon test kit that we recommend or our favorite radon detectors.
There are 3 counties that are in the EPA’s Zone Two (radon levels between 2-4 pCi/L) range, which is an area where radon is still a problem, but is not quite as bad as it is in the Zone One areas. It’s recommended that you test your home’s air for radon if you’re in a Zone Two area.
Finally, there is just one county that the EPA classified as Zone Three (radon levels between 0-1.9 pCi/L) range. Radon is more of a minor issue in this county, but that does not necessarily mean that it’s out of the woods. There are plenty of counties that the EPA said are Zone Ones that tested out and have some really high average radon levels. There are plenty of homes that have really high levels of radon sprinkled throughout the whole nation. The only way to find out if your home has a radon issue is to test for it.
At the end of the day, counties that are marked as Zone One by the EPA have an increased risk of having a radon problem that’s really high, areas that are Zone Two mave a higher risk of having a mid-level radon threat, and Zone One counties have the lowest risk. Whatever zoning you’re in, it’s wisest to test for radon in your home. The zone designations serve as more of an idea on what you might be able to expect from your radon test results.
Here’s a county by county breakdown of Connecticut’s radon levels, as per the EPA and radon.com. If you’d like to see what the below data means for your county, then you can do so on our article here.
| County Name | EPA Zone Designation (1=High, 2=Mid, 3=Low) | Average Radon Level (pCi/L) | Is Radon a Problem in this County? |
|---|---|---|---|
| Fairfield | Zone One (High) | 3.8 | Radon is a major problem in Fairfield County |
| Hartford | Zone Three (Low) | 2.7 | Radon is a problem in Hartford County |
| Litchfield | Zone Two (Mid) | 4.1 | Radon is a major problem in Litchfield County |
| Middlesex | Zone One (High) | 2.6 | Radon is a major problem in Middlesex County |
| New Haven | Zone One (High) | 3.7 | Radon is a major problem in New Haven County |
| New London | Zone One (High) | 3.9 | Radon is a major problem in New London County |
| Tolland | Zone Two (Mid) | 3.2 | Radon is a problem in Tolland County |
| Windham | Zone Two (Mid) | 4.1 | Radon is a major problem in Windham County |
Is Radon a Problem in Deleware?
Radon is a lesser problem in the state of Deleware. The average level for radon in Deleware is 3.9 pCi/L which is much higher than the national average of 1.3 pCi/L. Radon is a problem in Deleware, just like it is in every US state. There aren’t any counties in Deleware that have been flagged by the EPA for having higher levels of radon than what is common. That being said, radon is still problem in this state.
While there aren’t any counties the EPA noted for being a major risk for radon, it’s still an issue. If you choose to run your own radon test, please visit this article to read about and pick up either the radon test kit that we recommend or our favorite radon detectors.
There is just one county that is in the EPA’s Zone Two (radon levels between 2-4 pCi/L) range, which is an area where radon is still a problem, but is not quite as bad as it is in the Zone One areas. It’s recommended that you test your home’s air for radon if you’re in a Zone Two area.
Finally, there are 2 counties that the EPA classified as Zone Three (radon levels between 0-1.9 pCi/L) range. Radon is more of a minor issue in these counties, but that does not necessarily mean that you’re out of the woods. There are plenty of counties that the EPA said are Zone Ones that tested out and have some really high average radon levels. There are plenty of homes that have really high levels of radon sprinkled throughout the whole nation. The only way to find out if your home has a radon issue is to test for it.
At the end of the day, counties that are marked as Zone One by the EPA have an increased risk of having a radon problem that’s really high, areas that are Zone Two mave a higher risk of having a mid-level radon threat, and Zone One counties have the lowest risk. Whatever zoning you’re in, it’s wisest to test for radon in your home. The zone designations serve as more of an idea on what you might be able to expect from your radon test results.
Here’s a county by county breakdown of Deleware’s radon levels, as per the EPA and radon.com. If you’d like to read up on what this data means for your county, then you can do so on our article here.
| County Name | EPA Zone Designation (1=High, 2=Mid, 3=Low) | Average Radon Level (pCi/L) | Is Radon a Problem in this County? |
|---|---|---|---|
| Kent | Zone Three (Low) | 1.8 | Radon is a minor problem in Kent County |
| New Castle | Zone Two (Mid) | 2.6 | Radon is a problem in New Castle County |
| Sussex | Zone Three (Low) | 1.7 | Radon is a minor problem in Sussex County |
Is Radon a Problem in Florida?
Overall, radon is a lesser issue in the state of Florida. The average level for radon in Florida is 1.8 pCi/L which is slightly higher than the national average of 1.3 pCi/L. While radon is a problem to consider in Florida, just like it is in every US state, Florida is a lot better off than most of the nation. Not one county in Florida has been flagged by the EPA for having higher levels of radon than what is common, which is great news for Florida residents.
Despite the EPA’s not flagging any counties, radon is still a problem in a small handful of Florida counties. If you live in any of these counties, please run a radon test as soon as you can. You can do these yourself, or you can hire professionals. If you choose to run your own radon test, please visit this article to read about and pick up either the radon test kit that we recommend or our favorite radon detectors.
There are 9 counties that are in the EPA’s Zone Two (radon levels between 2-4 pCi/L) range, which is an area where radon is still a problem, but is not quite as bad as it is in the Zone One areas. It’s recommended that you test your home’s air for radon if you’re in a Zone Two area.
Finally, there are 58 counties that the EPA classified as Zone Three (radon levels between 0-1.9 pCi/L) range. Radon is more of a minor issue in these counties, but that does not necessarily mean that you’re out of the woods. There are plenty of counties that the EPA said are Zone Ones that tested out and have some really high average radon levels. There are plenty of homes that have really high levels of radon sprinkled throughout the whole nation. The only way to find out if your home has a radon issue is to test for it.
At the end of the day, counties that are marked as Zone One by the EPA have an increased risk of having a radon problem that’s really high, areas that are Zone Two mave a higher risk of having a mid-level radon threat, and Zone One counties have the lowest risk. Whatever zoning you’re in, it’s wisest to test for radon in your home. The zone designations serve as more of an idea on what you might be able to expect from your radon test results.
Here’s a county by county breakdown of Florida’s radon levels, as per the EPA and radon.com. If you’d like to see how this data affects your county, you can do so on our article here.
| County Name | EPA Zone Designation (1=High, 2=Mid, 3=Low) | Average Radon Level (pCi/L) | Is Radon a Problem in this County? |
|---|---|---|---|
| Alachua | Zone Two (Mid) | 5.7 | Radon is a major problem in Alachua County |
| Baker | Zone Three (Low) | 0.8 | Radon is a minor problem in Baker County |
| Bay | Zone Three (Low) | 0.3 | Radon is a minor problem in Bay County |
| Bradford | Zone Three (Low) | 0.7 | Radon is a minor problem in Bradford County |
| Brevard | Zone Three (Low) | 0.9 | Radon is a minor problem in Brevard County |
| Broward | Zone Three (Low) | 1.6 | Radon is a minor problem in Broward County |
| Calhoun | Zone Three (Low) | 0.4 | Radon is a minor problem in Calhoun County |
| Charlotte | Zone Three (Low) | 2.0 | Radon is a problem in Charlotte County |
| Citrus | Zone Two (Mid) | 1.7 | Radon is a problem in Citrus County |
| Clay | Zone Three (Low) | 1.6 | Radon is a minor problem in Clay County |
| Collier | Zone Three (Low) | 2.6 | Radon is a problem in Collier County |
| Columbia | Zone Two (Mid) | 0.5 | Radon is a problem in Columbia County |
| DeSoto | Zone Three (Low) | 0.9 | Radon is a minor problem in DeSoto County |
| Dixie | Zone Three (Low) | 1.0 | Radon is a minor problem in Dixie County |
| Duval | Zone Three (Low) | 2.2 | Radon is a problem in Duval County |
| Escambia | Zone Three (Low) | 0.5 | Radon is a minor problem in Escambia County |
| Flagler | Zone Three (Low) | 1.1 | Radon is a minor problem in Flagler County |
| Franklin | Zone Three (Low) | 0.3 | Radon is a minor problem in Franklin County |
| Gadsden | Zone Three (Low) | 0.8 | Radon is a minor problem in Gadsden County |
| Gilchrist | Zone Three (Low) | 1.3 | Radon is a minor problem in Gilchrist County |
| Glades | Zone Three (Low) | 1.6 | Radon is a minor problem in Glades County |
| Gulf | Zone Three (Low) | 0.5 | Radon is a minor problem in Gulf County |
| Hamilton | Zone Three (Low) | 0.6 | Radon is a minor problem in Hamilton County |
| Hardee | Zone Three (Low) | 1.0 | Radon is a minor problem in Hardee County |
| Hendry | Zone Three (Low) | 0.9 | Radon is a minor problem in Hendry County |
| Hernando | Zone Three (Low) | 0.8 | Radon is a minor problem in Hernando County |
| Highlands | Zone Three (Low) | 0.9 | Radon is a minor problem in Highlands County |
| Hillsborough | Zone Two (Mid) | 1.7 | Radon is a problem in Hillsborough County |
| Holmes | Zone Three (Low) | 0.4 | Radon is a minor problem in Holmes County |
| Indian River | Zone Three (Low) | 0.7 | Radon is a minor problem in Indian River County |
| Jackson | Zone Three (Low) | 0.7 | Radon is a minor problem in Jackson County |
| Jefferson | Zone Three (Low) | 1.2 | Radon is a minor problem in Jefferson County |
| Lafayette | Zone Three (Low) | 0.6 | Radon is a minor problem in Lafayette County |
| Lake | Zone Three (Low) | 0.9 | Radon is a minor problem in Lake County |
| Lee | Zone Three (Low) | 2.9 | Radon is a problem in Lee County |
| Leon | Zone Two (Mid) | 2.5 | Radon is a problem in Leon County |
| Levy | Zone Three (Low) | 1.8 | Radon is a minor problem in Levy County |
| Liberty | Zone Three (Low) | 0.1 | Radon is a minor problem in Liberty County |
| Madison | Zone Three (Low) | 1.2 | Radon is a minor problem in Madison County |
| Manatee | Zone Three (Low) | 1.6 | Radon is a minor problem in Manatee County |
| Marion | Zone Two (Mid) | 5.8 | Radon is a major problem in Marion County |
| Martin | Zone Three (Low) | 1.0 | Radon is a minor problem in Martin County |
| Miami-Dade | Zone Two (Mid) | 2.0 | Radon is a problem in Miami-Dade County |
| Monroe | Zone Three (Low) | 1.2 | Radon is a minor problem in Monroe County |
| Nassau | Zone Three (Low) | 1.7 | Radon is a minor problem in Nassau County |
| Okaloosa | Zone Three (Low) | 0.5 | Radon is a minor problem in Okaloosa County |
| Okeechobee | Zone Three (Low) | 0.7 | Radon is a minor problem in Okeechobee County |
| Orange | Zone Three (Low) | 1.6 | Radon is a minor problem in Orange County |
| Osceola | Zone Three (Low) | 0.7 | Radon is a minor problem in Osceola County |
| Palm Beach | Zone Three (Low) | 1.5 | Radon is a minor problem in Palm Beach County |
| Pasco | Zone Three (Low) | 0.9 | Radon is a minor problem in Pasco County |
| Pinellas | Zone Three (Low) | 0.8 | Radon is a minor problem in Pinellas County |
| Polk | Zone Two (Mid) | 2.4 | Radon is a problem in Polk County |
| Putnam | Zone Three (Low) | 0.4 | Radon is a minor problem in Putnam County |
| Saint Johns (St. Johns) | Zone Three (Low) | 1.3 | Radon is a minor problem in Saint Johns County |
| Saint Lucie (St. Lucie) | Zone Three (Low) | 0.7 | Radon is a minor problem in Saint Lucie County |
| Santa Rosa | Zone Three (Low) | 0.5 | Radon is a minor problem in Santa Rosa County |
| Sarasota | Zone Three (Low) | 2.0 | Radon is a problem in Sarasota County |
| Seminole | Zone Three (Low) | 0.9 | Radon is a minor problem in Seminole County |
| Sumter | Zone Three (Low) | 1.7 | Radon is a minor problem in Sumter County |
| Suwannee | Zone Three (Low) | 0.9 | Radon is a minor problem in Suwannee County |
| Taylor | Zone Three (Low) | 2.4 | Radon is a problem in Taylor County |
| Union | Zone Two (Mid) | 1.9 | Radon is a problem in Union County |
| Volusia | Zone Three (Low) | 0.6 | Radon is a minor problem in Volusia County |
| Wakulla | Zone Three (Low) | 0.9 | Radon is a minor problem in Wakulla County |
| Walton | Zone Three (Low) | 0.7 | Radon is a minor problem in Walton County |
| Washington | Zone Three (Low) | 0.3 | Radon is a minor problem in Washington County |
Is Radon a Problem in Georgia?
Radon is indeed a problem in the state of Georgia. The average level for radon in Georgia is 2.3 pCi/L which is higher than the national average of 1.3 pCi/L. Radon is a problem in Georgia, just like it is in every US state. Five counties in Georgia have been flagged by the EPA for having higher levels of radon than what is common. These counties include Cobb, DeKalb, Fulton, Gwinnett, and Screven.
If you live in any of these counties, please run a radon test as soon as you can. You can do these yourself, or you can hire professionals. If you choose to run your own radon test, please visit this article to read about and pick up either the radon test kit that we recommend or our favorite radon detectors.
There are 57 counties that are in the EPA’s Zone Two (radon levels between 2-4 pCi/L) range, which is an area where radon is still a problem, but is not quite as bad as it is in the Zone One areas. It’s recommended that you test your home’s air for radon if you’re in a Zone Two area.
Finally, there are 97 counties that the EPA classified as Zone Three (radon levels between 0-1.9 pCi/L) range. Radon is more of a minor issue in these counties, but that does not necessarily mean that you’re out of the woods. There are plenty of counties that the EPA said are Zone Ones that tested out and have some really high average radon levels. There are plenty of homes that have really high levels of radon sprinkled throughout the whole nation. The only way to find out if your home has a radon issue is to test for it.
At the end of the day, counties that are marked as Zone One by the EPA have an increased risk of having a radon problem that’s really high, areas that are Zone Two mave a higher risk of having a mid-level radon threat, and Zone One counties have the lowest risk. Whatever zoning you’re in, it’s wisest to test for radon in your home. The zone designations serve as more of an idea on what you might be able to expect from your radon test results.
Here’s a county by county breakdown of Georgia’s radon levels, as per the EPA and radon.com. If you’d like to see more detailed information on each county, then you can do so on our article here.
| County Name | EPA Zone Designation (1=High, 2=Mid, 3=Low) | Average Radon Level (pCi/L) | Is Radon a Problem in this County? |
|---|---|---|---|
| Appling | Zone Three (Low) | No Data | Radon is a minor problem in Appling County |
| Atkinson | Zone Three (Low) | No Data | Radon is a minor problem in Atkinson County |
| Bacon | Zone Three (Low) | No Data | Radon is a minor problem in Bacon County |
| Baker | Zone Three (Low) | No Data | Radon is a minor problem in Baker County |
| Baldwin | Zone Three (Low) | 1.7 | Radon is a minor problem in Baldwin County |
| Banks | Zone Two (Mid) | 3.6 | Radon is a problem in Banks County |
| Barrow | Zone Two (Mid) | 5.0 | Radon is a major problem in Barrow County |
| Bartow | Zone Two (Mid) | 2.9 | Radon is a problem in Bartow County |
| Ben Hill | Zone Three (Low) | 0.5 | Radon is a minor problem in Ben Hill County |
| Berrien | Zone Three (Low) | 0.4 | Radon is a minor problem in Berrien County |
| Bibb | Zone Three (Low) | 1.3 | Radon is a minor problem in Bibb County |
| Bleckley | Zone Three (Low) | 0.6 | Radon is a minor problem in Bleckley County |
| Brantley | Zone Three (Low) | 9.5 | Radon is an extreme problem in Brantley County |
| Brooks | Zone Three (Low) | 1.0 | Radon is a minor problem in Brooks County |
| Bryan | Zone Three (Low) | 0.1 | Radon is a minor problem in Bryan County |
| Bulloch | Zone Three (Low) | 0.9 | Radon is a minor problem in Bulloch County |
| Burke | Zone Three (Low) | 2.1 | Radon is a problem in Burke County |
| Butts | Zone Two (Mid) | 3.5 | Radon is a problem in Butts County |
| Calhoun | Zone Three (Low) | No Data | Radon is a minor problem in Calhoun County |
| Camden | Zone Three (Low) | 0.5 | Radon is a minor problem in Camden County |
| Candler | Zone Three (Low) | 0.7 | Radon is a minor problem in Candler County |
| Carroll | Zone Two (Mid) | 3.7 | Radon is a problem in Carroll County |
| Catoosa | Zone Two (Mid) | 2.6 | Radon is a problem in Catoosa County |
| Charlton | Zone Three (Low) | No Data | Radon is a minor problem in Charlton County |
| Chatham | Zone Three (Low) | 1.8 | Radon is a minor problem in Chatham County |
| Chattahoochee | Zone Three (Low) | 0.3 | Radon is a minor problem in Chattahoochee County |
| Chattooga | Zone Three (Low) | 3.4 | Radon is a problem in Chattooga County |
| Cherokee | Zone Two (Mid) | 2.1 | Radon is a problem in Cherokee County |
| Clarke | Zone Two (Mid) | 2.0 | Radon is a problem in Clarke County |
| Clay | Zone Three (Low) | No Data | Radon is a minor problem in Clay County |
| Clayton | Zone Two (Mid) | 2.1 | Radon is a problem in Clayton County |
| Clinch | Zone Three (Low) | 2.5 | Radon is a problem in Clinch County |
| Cobb | Zone One (High) | 1.9 | Radon is a major problem in Cobb County |
| Coffee | Zone Three (Low) | 1.1 | Radon is a minor problem in Coffee County |
| Colquitt | Zone Three (Low) | 0.5 | Radon is a minor problem in Colquitt County |
| Columbia | Zone Three (Low) | 1.1 | Radon is a minor problem in Columbia County |
| Cook | Zone Three (Low) | 2.1 | Radon is a problem in Cook County |
| Coweta | Zone Two (Mid) | 2.7 | Radon is a problem in Coweta County |
| Crawford | Zone Three (Low) | 3.2 | Radon is a problem in Crawford County |
| Crisp | Zone Three (Low) | 0.2 | Radon is a minor problem in Crisp County |
| Dade | Zone Three (Low) | 2.3 | Radon is a problem in Dade County |
| Dawson | Zone Two (Mid) | 2.4 | Radon is a problem in Dawson County |
| DeKalb | Zone One (High) | 2.6 | Radon is a major problem in DeKalb County |
| Decatur | Zone Three (Low) | 1.1 | Radon is a minor problem in Decatur County |
| Dodge | Zone Three (Low) | 0.2 | Radon is a minor problem in Dodge County |
| Dooly | Zone Three (Low) | 0.4 | Radon is a minor problem in Dooly County |
| Dougherty | Zone Three (Low) | 1.6 | Radon is a minor problem in Dougherty County |
| Douglas | Zone Two (Mid) | 4.1 | Radon is a major problem in Douglas County |
| Early | Zone Three (Low) | 1.8 | Radon is a minor problem in Early County |
| Echols | Zone Three (Low) | No Data | Radon is a minor problem in Echols County |
| Effingham | Zone Three (Low) | 0.7 | Radon is a minor problem in Effingham County |
| Elbert | Zone Two (Mid) | 2.6 | Radon is a problem in Elbert County |
| Emanuel | Zone Three (Low) | 0.7 | Radon is a minor problem in Emanuel County |
| Evans | Zone Three (Low) | 0.7 | Radon is a minor problem in Evans County |
| Fannin | Zone Two (Mid) | 4.6 | Radon is a major problem in Fannin County |
| Fayette | Zone Two (Mid) | 3.0 | Radon is a problem in Fayette County |
| Floyd | Zone Two (Mid) | 1.9 | Radon is a problem in Floyd County |
| Forsyth | Zone Two (Mid) | 1.9 | Radon is a problem in Forsyth County |
| Franklin | Zone Two (Mid) | 3.7 | Radon is a problem in Franklin County |
| Fulton | Zone One (High) | 2.3 | Radon is a major problem in Fulton County |
| Gilmer | Zone Two (Mid) | 4.3 | Radon is a major problem in Gilmer County |
| Glascock | Zone Three (Low) | 1.3 | Radon is a minor problem in Glascock County |
| Glynn | Zone Three (Low) | 0.8 | Radon is a minor problem in Glynn County |
| Gordon | Zone Three (Low) | 2.8 | Radon is a problem in Gordon County |
| Grady | Zone Three (Low) | No Data | Radon is a minor problem in Grady County |
| Greene | Zone Two (Mid) | 2.6 | Radon is a problem in Greene County |
| Gwinnett | Zone One (High) | 3.2 | Radon is a major problem in Gwinnett County |
| Habersham | Zone Two (Mid) | 3.4 | Radon is a problem in Habersham County |
| Hall | Zone Two (Mid) | 3.6 | Radon is a problem in Hall County |
| Hancock | Zone Three (Low) | 2.6 | Radon is a problem in Hancock County |
| Haralson | Zone Two (Mid) | 4.0 | Radon is a major problem in Haralson County |
| Harris | Zone Two (Mid) | 8.0 | Radon is an extreme problem in Harris County |
| Hart | Zone Two (Mid) | 4.3 | Radon is a major problem in Hart County |
| Heard | Zone Two (Mid) | 2.5 | Radon is a problem in Heard County |
| Henry | Zone Two (Mid) | 2.5 | Radon is a problem in Henry County |
| Houston | Zone Three (Low) | 2.1 | Radon is a problem in Houston County |
| Irwin | Zone Three (Low) | No Data | Radon is a minor problem in Irwin County |
| Jackson | Zone Two (Mid) | 4.1 | Radon is a major problem in Jackson County |
| Jasper | Zone Two (Mid) | 2.8 | Radon is a problem in Jasper County |
| Jeff Davis | Zone Three (Low) | No Data | Radon is a minor problem in Jeff Davis County |
| Jefferson | Zone Three (Low) | 2.0 | Radon is a problem in Jefferson County |
| Jenkins | Zone Three (Low) | 1.3 | Radon is a minor problem in Jenkins County |
| Johnson | Zone Three (Low) | 2.2 | Radon is a problem in Johnson County |
| Jones | Zone Three (Low) | 3.2 | Radon is a problem in Jones County |
| Lamar | Zone Two (Mid) | 3.6 | Radon is a problem in Lamar County |
| Lanier | Zone Three (Low) | No Data | Radon is a minor problem in Lanier County |
| Laurens | Zone Three (Low) | 1.2 | Radon is a minor problem in Laurens County |
| Lee | Zone Three (Low) | 1.0 | Radon is a minor problem in Lee County |
| Liberty | Zone Three (Low) | 0.3 | Radon is a minor problem in Liberty County |
| Lincoln | Zone Three (Low) | 0.6 | Radon is a minor problem in Lincoln County |
| Long | Zone Three (Low) | No Data | Radon is a minor problem in Long County |
| Lowndes | Zone Three (Low) | 1.0 | Radon is a minor problem in Lowndes County |
| Lumpkin | Zone Two (Mid) | 3.8 | Radon is a problem in Lumpkin County |
| Macon | Zone Three (Low) | 1.5 | Radon is a minor problem in Macon County |
| Madison | Zone Two (Mid) | 2.4 | Radon is a problem in Madison County |
| Marion | Zone Three (Low) | 1.4 | Radon is a minor problem in Marion County |
| McDuffie | Zone Three (Low) | 2.9 | Radon is a problem in McDuffie County |
| McIntosh | Zone Three (Low) | 0.8 | Radon is a minor problem in McIntosh County |
| Meriwether | Zone Two (Mid) | 1.4 | Radon is a problem in Meriwether County |
| Miller | Zone Three (Low) | No Data | Radon is a minor problem in Miller County |
| Mitchell | Zone Three (Low) | 0.9 | Radon is a minor problem in Mitchell County |
| Monroe | Zone Two (Mid) | 2.8 | Radon is a problem in Monroe County |
| Montgomery | Zone Three (Low) | 1.0 | Radon is a minor problem in Montgomery County |
| Morgan | Zone Two (Mid) | 1.6 | Radon is a problem in Morgan County |
| Murray | Zone Three (Low) | 0.9 | Radon is a minor problem in Murray County |
| Muscogee | Zone Three (Low) | 1.5 | Radon is a minor problem in Muscogee County |
| Newton | Zone Two (Mid) | 2.9 | Radon is a problem in Newton County |
| Oconee | Zone Two (Mid) | 2.0 | Radon is a problem in Oconee County |
| Oglethorpe | Zone Two (Mid) | 3.7 | Radon is a problem in Oglethorpe County |
| Paulding | Zone Two (Mid) | 3.3 | Radon is a problem in Paulding County |
| Peach | Zone Three (Low) | 2.5 | Radon is a problem in Peach County |
| Pickens | Zone Two (Mid) | 3.7 | Radon is a problem in Pickens County |
| Pierce | Zone Three (Low) | 0.3 | Radon is a minor problem in Pierce County |
| Pike | Zone Two (Mid) | 5.2 | Radon is a major problem in Pike County |
| Polk | Zone Three (Low) | 3.5 | Radon is a problem in Polk County |
| Pulaski | Zone Three (Low) | 1.0 | Radon is a minor problem in Pulaski County |
| Putnam | Zone Three (Low) | 5.4 | Radon is a major problem in Putnam County |
| Quitman | Zone Three (Low) | No Data | Radon is a minor problem in Quitman County |
| Rabun | Zone Two (Mid) | 3.7 | Radon is a problem in Rabun County |
| Randolph | Zone Three (Low) | 1.5 | Radon is a minor problem in Randolph County |
| Richmond | Zone Two (Mid) | 1.1 | Radon is a problem in Richmond County |
| Rockdale | Zone Two (Mid) | 3.3 | Radon is a problem in Rockdale County |
| Schley | Zone Three (Low) | 0.8 | Radon is a minor problem in Schley County |
| Screven | Zone Three (Low) | 0.4 | Radon is a minor problem in Screven County |
| Seminole | Zone Three (Low) | No Data | Radon is a minor problem in Seminole County |
| Spalding | Zone Two (Mid) | 3.8 | Radon is a problem in Spalding County |
| Stephens | Zone Two (Mid) | 2.8 | Radon is a problem in Stephens County |
| Stewart | Zone Three (Low) | 0.6 | Radon is a minor problem in Stewart County |
| Sumter | Zone Three (Low) | 0.9 | Radon is a minor problem in Sumter County |
| Talbot | Zone Two (Mid) | 0.9 | Radon is a problem in Talbot County |
| Taliaferro | Zone Three (Low) | 80.7 | Radon is an extreme problem in Taliaferro County |
| Tattnall | Zone Three (Low) | 0.6 | Radon is a minor problem in Tattnall County |
| Taylor | Zone Three (Low) | No Data | Radon is a minor problem in Taylor County |
| Telfair | Zone Three (Low) | 0.6 | Radon is a minor problem in Telfair County |
| Terrell | Zone Three (Low) | 0.6 | Radon is a minor problem in Terrell County |
| Thomas | Zone Three (Low) | 1.1 | Radon is a minor problem in Thomas County |
| Tift | Zone Three (Low) | 0.9 | Radon is a minor problem in Tift County |
| Toombs | Zone Three (Low) | 0.5 | Radon is a minor problem in Toombs County |
| Towns | Zone Two (Mid) | 3.9 | Radon is a problem in Towns County |
| Treutlen | Zone Three (Low) | No Data | Radon is a minor problem in Treutlen County |
| Troup | Zone Two (Mid) | 2.8 | Radon is a problem in Troup County |
| Turner | Zone Three (Low) | 0.9 | Radon is a minor problem in Turner County |
| Twiggs | Zone Three (Low) | 3.6 | Radon is a problem in Twiggs County |
| Union | Zone Two (Mid) | 4.5 | Radon is a major problem in Union County |
| Upson | Zone Two (Mid) | 1.1 | Radon is a problem in Upson County |
| Walker | Zone Two (Mid) | 2.6 | Radon is a problem in Walker County |
| Walton | Zone Two (Mid) | 3.6 | Radon is a problem in Walton County |
| Ware | Zone Three (Low) | 0.5 | Radon is a minor problem in Ware County |
| Warren | Zone Two (Mid) | 0.8 | Radon is a problem in Warren County |
| Washington | Zone Three (Low) | 0.9 | Radon is a minor problem in Washington County |
| Wayne | Zone Three (Low) | 0.4 | Radon is a minor problem in Wayne County |
| Webster | Zone Three (Low) | 0.5 | Radon is a minor problem in Webster County |
| Wheeler | Zone Three (Low) | 0.4 | Radon is a minor problem in Wheeler County |
| White | Zone Two (Mid) | 2.9 | Radon is a problem in White County |
| Whitfield | Zone Two (Mid) | 2.1 | Radon is a problem in Whitfield County |
| Wilcox | Zone Three (Low) | 1.1 | Radon is a minor problem in Wilcox County |
| Wilkes | Zone Three (Low) | 1.1 | Radon is a minor problem in Wilkes County |
| Wilkinson | Zone Three (Low) | 2.1 | Radon is a problem in Wilkinson County |
| Worth | Zone Three (Low) | 2.7 | Radon is a problem in Worth County |
Is Radon a Problem in Hawaii?
Radon is a very minor problem in the state of Hawaii. There isn’t enough dta to find the average level of radon in Hawaii, but the fact that the EPA put the whole state in Zone Three is a good sign for Hawaiian residents. No island was flagged by the EPA for having radon issues and there aren’t enough tests to conclude that it is a problem anywhere on the islands.
Radon is a dangerous, radioactive gas and the EPA still recommends that people test for it, however. If you would like to test for radon levels in your home, you can run a test yourself, or you can hire professionals. If you choose to run your own radon test, please visit this article to read about and pick up either the radon test kit that we recommend or our favorite radon detectors.
Here’s a county by county breakdown of Hawaii’s radon levels, as per the EPA and radon.com. If you’d like to see the county by county data that we collected explained, then you can do so on our article here.
| County Name | EPA Zone Designation (1=High, 2=Mid, 3=Low) | Average Radon Level (pCi/L) | Is Radon a Problem in this County? |
|---|---|---|---|
| Hawaii | Zone Three (Low) | No Data | Radon is a minor problem in Hawaii County |
| Honolulu | Zone Three (Low) | No Data | Radon is a minor problem in Honolulu County |
| Kalawao | Zone Three (Low) | No Data | Radon is a minor problem in Kalawao County |
| Kauai | Zone Three (Low) | No Data | Radon is a minor problem in Kauai County |
| Maui | Zone Three (Low) | No Data | Radon is a minor problem in Maui County |
Is Radon a Problem in Idaho?
Radon is indeed a problem in the state of Idaho. The average level for radon in Idaho is 7.3 pCi/L which is alarmingly higher than the national average of 1.3 pCi/L. Radon is a severe problem in Idaho, more so than most every US state. Idaho has a worse radon problem than most of the US. 18 different counties in Idaho have been flagged by the EPA for having higher levels of radon than what is common. These counties include Benewah, Blaine, Boise, Boundary, Butte, Camas, Clark, Clearwater, Custer, Elmore, Fremont, Gooding, Idaho, Kootenai, Latah, Lemhi, Shoshone, and Valley.
If you live in any of these counties, please run a radon test as soon as you can. You can do these yourself, or you can hire professionals. If you choose to run your own radon test, please visit this article to read about and pick up either the radon test kit that we recommend or our favorite radon detectors.
There are 21 counties that are in the EPA’s Zone Two (radon levels between 2-4 pCi/L) range, which is an area where radon is still a problem, but is not quite as bad as it is in the Zone One areas. It’s recommended that you test your home’s air for radon if you’re in a Zone Two area.
Finally, there are just 5 counties that the EPA classified as Zone Three (radon levels between 0-1.9 pCi/L) range. This would suggest that radon is more of a minor issue in these counties, but that isn’t really the case. Tests have shown that radon is indeed quite the issue in most of these Zone Three counties. There are plenty of homes that have really high levels of radon sprinkled throughout the whole nation and the only way to find out if your home has a radon issue is to test for it.
At the end of the day, counties that are marked as Zone One by the EPA have an increased risk of having a radon problem that’s really high, areas that are Zone Two have a higher risk of having a mid-level radon threat, and Zone Three counties have the lowest risk. Whatever zoning you’re in, it’s wisest to test for radon in your home. The zone designations serve as more of an idea on what you might be able to expect from your radon test results.
Here’s a county by county breakdown of Idaho’s radon levels, as per the EPA and radon.com. If you would like to see what this data means for you, then you can do so on our article here.
| County Name | EPA Zone Designation (1=High, 2=Mid, 3=Low) | Average Radon Level (pCi/L) | Is Radon a Problem in this County? |
|---|---|---|---|
| Ada | Zone Two (Mid) | 3.0 | Radon is a problem in Ada County |
| Adams | Zone Three (Low) | 5.0 | Radon is a major problem in Adams County |
| Bannock | Zone Two (Mid) | 5.5 | Radon is a major problem in Bannock County |
| Bear Lake | Zone Two (Mid) | 6.9 | Radon is a major problem in Bear Lake County |
| Benewah | Zone One (High) | 4.4 | Radon is a major problem in Benewah County |
| Bingham | Zone Two (Mid) | 5.0 | Radon is a major problem in Bingham County |
| Blaine | Zone One (High) | 8.5 | Radon is an extreme problem in Blaine County |
| Boise | Zone One (High) | 3.3 | Radon is a major problem in Boise County |
| Bonner | Zone Two (Mid) | 5.1 | Radon is a major problem in Bonner County |
| Bonneville | Zone Two (Mid) | 4.1 | Radon is a major problem in Bonneville County |
| Boundary | Zone One (High) | 2.2 | Radon is a major problem in Boundary County |
| Butte | Zone One (High) | 18.4 | Radon is an extreme problem in Butte County |
| Camas | Zone One (High) | 5.6 | Radon is a major problem in Camas County |
| Canyon | Zone Two (Mid) | 1.9 | Radon is a problem in Canyon County |
| Caribou | Zone Two (Mid) | 4.7 | Radon is a major problem in Caribou County |
| Cassia | Zone Two (Mid) | 7.5 | Radon is a major problem in Cassia County |
| Clark | Zone One (High) | 13.9 | Radon is an extreme problem in Clark County |
| Clearwater | Zone One (High) | 2.9 | Radon is a major problem in Clearwater County |
| Custer | Zone One (High) | 8.8 | Radon is an extreme problem in Custer County |
| Elmore | Zone One (High) | 7.8 | Radon is a major problem in Elmore County |
| Franklin | Zone Two (Mid) | 3.8 | Radon is a problem in Franklin County |
| Fremont | Zone One (High) | 6.9 | Radon is a major problem in Fremont County |
| Gem | Zone Three (Low) | 2.1 | Radon is a problem in Gem County |
| Gooding | Zone One (High) | 3.6 | Radon is a major problem in Gooding County |
| Idaho | Zone One (High) | 4.7 | Radon is a major problem in Idaho County |
| Jefferson | Zone Two (Mid) | 7.8 | Radon is a major problem in Jefferson County |
| Jerome | Zone Two (Mid) | 2.6 | Radon is a problem in Jerome County |
| Kootenai | Zone One (High) | 12.3 | Radon is an extreme problem in Kootenai County |
| Latah | Zone One (High) | 3.4 | Radon is a major problem in Latah County |
| Lemhi | Zone One (High) | 7.5 | Radon is a major problem in Lemhi County |
| Lewis | Zone Three (Low) | 13.0 | Radon is an extreme problem in Lewis County |
| Lincoln | Zone Two (Mid) | 6.3 | Radon is a major problem in Lincoln County |
| Madison | Zone Two (Mid) | 9.9 | Radon is an extreme problem in Madison County |
| Minidoka | Zone Two (Mid) | 2.8 | Radon is a problem in Minidoka County |
| Nez Perce | Zone Three (Low) | 3.4 | Radon is a problem in Nez Perce County |
| Oneida | Zone Two (Mid) | 6.4 | Radon is a major problem in Oneida County |
| Owyhee | Zone Two (Mid) | 3.0 | Radon is a problem in Owyhee County |
| Payette | Zone Two (Mid) | 2.0 | Radon is a problem in Payette County |
| Power | Zone Two (Mid) | 3.5 | Radon is a problem in Power County |
| Shoshone | Zone One (High) | 11.2 | Radon is an extreme problem in Shoshone County |
| Teton | Zone Two (Mid) | 10.8 | Radon is an extreme problem in Teton County |
| Twin Falls | Zone Two (Mid) | 3.0 | Radon is a problem in Twin Falls County |
| Valley | Zone One (High) | 3.1 | Radon is a major problem in Valley County |
| Washington | Zone Three (Low) | 3.4 | Radon is a problem in Washington County |
Is Radon a Problem in Illinois?
Radon is a major problem in the state of Illinois. The average level for radon in Illinois is 5.3 pCi/L which is much higher than the national average of 1.3 pCi/L. Radon is a problem in Illinois, just like it is in every US state. 56 different counties in Illinois have been flagged by the EPA for having higher levels of radon than what is common. These counties include Adams, Boone, Brown, Bureau, Calhoun, Carroll, Cass, Champaign, Coles, DeKalb, DeWitt, Douglas, Edgar, Ford, Fulton, Greene, Grundy, Hancock, Henderson, Henry, Iroquois, Jersey, Jo Daviess, Kane, Kendall, Knox, La Salle, Lee, Livingston, Logan, McDonough, McLean, Macon, Marshall, Mason, Menard, Mercer, Morgan, Moultrie, Ogle, Peoria, Piatt, Pike, Putnam, Rock Island, Sangamon, Schuyler, Scott, Stark, Stephenson, Tazewell, Vermilion, Whiteside, Winnebago, and Woodford.
If you live in any of these counties, please run a radon test as soon as you can. You can do these yourself, or you can hire professionals. If you choose to run your own radon test, please visit this article to read about and pick up either the radon test kit that we recommend or our favorite radon detectors.
There are 43 counties that are in the EPA’s Zone Two (radon levels between 2-4 pCi/L) range, which is an area where radon is still a problem, but is not quite as bad as it is in the Zone One areas. It’s recommended that you test your home’s air for radon if you’re in a Zone Two area.
Finally, there are just 3 counties that the EPA classified as Zone Three (radon levels between 0-1.9 pCi/L) range. Radon is more of a minor issue in these counties, but that does not necessarily mean that you’re out of the woods. There are plenty of counties that the EPA said are in Zone Three that tested out and have some really high average radon levels. There are plenty of homes that have really high levels of radon sprinkled throughout the whole nation. The only way to find out if your home has a radon issue is to test for it.
At the end of the day, counties that are marked as Zone One by the EPA have an increased risk of having a radon problem that’s really high, areas that are Zone Two have a higher risk of having a mid-level radon threat, and Zone Three counties have the lowest risk. Whatever zoning you’re in, it’s wisest to test for radon in your home. The zone designations serve as more of an idea on what you might be able to expect from your radon test results.
Here’s a county by county breakdown of Illinois’s radon levels, as per the EPA and radon.com. If you’d like to see what the data on the below table means for you, then you can do so on our article here.
| County Name | EPA Zone Designation (1=High, 2=Mid, 3=Low) | Average Radon Level (pCi/L) | Is Radon a Problem in this County? |
|---|---|---|---|
| Adams | Zone One (High) | 7.5 | Radon is a major problem in Adams County |
| Alexander | Zone Three (Low) | 2.6 | Radon is a problem in Alexander County |
| Bond | Zone Two (Mid) | 4.3 | Radon is a major problem in Bond County |
| Boone | Zone One (High) | 4.4 | Radon is a major problem in Boone County |
| Brown | Zone One (High) | 5.6 | Radon is a major problem in Brown County |
| Bureau | Zone One (High) | 6.4 | Radon is a major problem in Bureau County |
| Calhoun | Zone One (High) | 3.7 | Radon is a major problem in Calhoun County |
| Carroll | Zone One (High) | 6.9 | Radon is a major problem in Carroll County |
| Cass | Zone One (High) | 4.8 | Radon is a major problem in Cass County |
| Champaign | Zone One (High) | 4.9 | Radon is a major problem in Champaign County |
| Christian | Zone Two (Mid) | 6.7 | Radon is a major problem in Christian County |
| Clark | Zone Two (Mid) | 2.7 | Radon is a problem in Clark County |
| Clay | Zone Two (Mid) | 2.1 | Radon is a problem in Clay County |
| Clinton | Zone Two (Mid) | 3.7 | Radon is a problem in Clinton County |
| Coles | Zone One (High) | 3.4 | Radon is a major problem in Coles County |
| Cook | Zone Two (Mid) | 2.1 | Radon is a problem in Cook County |
| Crawford | Zone Two (Mid) | 1.7 | Radon is a problem in Crawford County |
| Cumberland | Zone Two (Mid) | 2.5 | Radon is a problem in Cumberland County |
| DeKalb | Zone One (High) | 4.0 | Radon is a major problem in DeKalb County |
| DeWitt | Zone One (High) | 7.9 | Radon is a major problem in DeWitt County |
| Douglas | Zone One (High) | 5.4 | Radon is a major problem in Douglas County |
| DuPage | Zone Two (Mid) | 4.1 | Radon is a major problem in DuPage County |
| Edgar | Zone One (High) | 2.2 | Radon is a major problem in Edgar County |
| Edwards | Zone Two (Mid) | 2.8 | Radon is a problem in Edwards County |
| Effingham | Zone Two (Mid) | 3.5 | Radon is a problem in Effingham County |
| Fayette | Zone Two (Mid) | 3.7 | Radon is a problem in Fayette County |
| Ford | Zone One (High) | 5.3 | Radon is a major problem in Ford County |
| Franklin | Zone Two (Mid) | 2.4 | Radon is a problem in Franklin County |
| Fulton | Zone One (High) | 7.9 | Radon is a major problem in Fulton County |
| Gallatin | Zone Two (Mid) | 3.7 | Radon is a problem in Gallatin County |
| Greene | Zone One (High) | 4.8 | Radon is a major problem in Greene County |
| Grundy | Zone One (High) | 7.2 | Radon is a major problem in Grundy County |
| Hamilton | Zone Two (Mid) | 2.5 | Radon is a problem in Hamilton County |
| Hancock | Zone One (High) | 6.3 | Radon is a major problem in Hancock County |
| Hardin | Zone Two (Mid) | 2.5 | Radon is a problem in Hardin County |
| Henderson | Zone One (High) | 6.7 | Radon is a major problem in Henderson County |
| Henry | Zone One (High) | 6.3 | Radon is a major problem in Henry County |
| Iroquois | Zone One (High) | 3.6 | Radon is a major problem in Iroquois County |
| Jackson | Zone Two (Mid) | 3.1 | Radon is a problem in Jackson County |
| Jasper | Zone Two (Mid) | 2.7 | Radon is a problem in Jasper County |
| Jefferson | Zone Two (Mid) | 2.3 | Radon is a problem in Jefferson County |
| Jersey | Zone One (High) | 4.4 | Radon is a major problem in Jersey County |
| Jo Daviess | Zone One (High) | 7.7 | Radon is a major problem in Jo Daviess County |
| Johnson | Zone Two (Mid) | 2.0 | Radon is a problem in Johnson County |
| Kane | Zone One (High) | 4.6 | Radon is a major problem in Kane County |
| Kankakee | Zone Two (Mid) | 4.2 | Radon is a major problem in Kankakee County |
| Kendall | Zone One (High) | 6.0 | Radon is a major problem in Kendall County |
| Knox | Zone One (High) | 8.2 | Radon is an extreme problem in Knox County |
| La Salle | Zone One (High) | 5.8 | Radon is a major problem in La Salle County |
| Lake | Zone Two (Mid) | 3.1 | Radon is a problem in Lake County |
| Lawrence | Zone Two (Mid) | 3.4 | Radon is a problem in Lawrence County |
| Lee | Zone One (High) | 4.3 | Radon is a major problem in Lee County |
| Livingston | Zone One (High) | 8.8 | Radon is an extreme problem in Livingston County |
| Logan | Zone One (High) | 6.3 | Radon is a major problem in Logan County |
| McDonough | Zone One (High) | 5.6 | Radon is a major problem in McDonough County |
| McHenry | Zone Two (Mid) | 4.0 | Radon is a major problem in McHenry County |
| McLean | Zone One (High) | 5.6 | Radon is a major problem in McLean County |
| Macon | Zone One (High) | 4.6 | Radon is a major problem in Macon County |
| Macoupin | Zone Two (Mid) | 3.7 | Radon is a problem in Macoupin County |
| Madison | Zone Two (Mid) | 4.1 | Radon is a major problem in Madison County |
| Marion | Zone Two (Mid) | 2.5 | Radon is a problem in Marion County |
| Marshall | Zone One (High) | 10.5 | Radon is an extreme problem in Marshall County |
| Mason | Zone One (High) | 5.6 | Radon is a major problem in Mason County |
| Massac | Zone Three (Low) | 1.8 | Radon is a minor problem in Massac County |
| Menard | Zone One (High) | 6.1 | Radon is a major problem in Menard County |
| Mercer | Zone One (High) | 8.3 | Radon is an extreme problem in Mercer County |
| Monroe | Zone Two (Mid) | 4.7 | Radon is a major problem in Monroe County |
| Montgomery | Zone Two (Mid) | 4.8 | Radon is a major problem in Montgomery County |
| Morgan | Zone One (High) | 6.8 | Radon is a major problem in Morgan County |
| Moultrie | Zone One (High) | 6.5 | Radon is a major problem in Moultrie County |
| Ogle | Zone One (High) | 7.3 | Radon is a major problem in Ogle County |
| Peoria | Zone One (High) | 7.3 | Radon is a major problem in Peoria County |
| Perry | Zone Two (Mid) | 3.2 | Radon is a problem in Perry County |
| Piatt | Zone One (High) | 5.2 | Radon is a major problem in Piatt County |
| Pike | Zone One (High) | 4.7 | Radon is a major problem in Pike County |
| Pope | Zone Two (Mid) | 2.4 | Radon is a problem in Pope County |
| Pulaski | Zone Three (Low) | 2.4 | Radon is a problem in Pulaski County |
| Putnam | Zone One (High) | 8.0 | Radon is an extreme problem in Putnam County |
| Randolph | Zone Two (Mid) | 4.5 | Radon is a major problem in Randolph County |
| Richland | Zone Two (Mid) | 2.8 | Radon is a problem in Richland County |
| Rock Island | Zone One (High) | 5.0 | Radon is a major problem in Rock Island County |
| Saline | Zone Two (Mid) | 2.2 | Radon is a problem in Saline County |
| Sangamon | Zone One (High) | 3.9 | Radon is a major problem in Sangamon County |
| Schuyler | Zone One (High) | 5.8 | Radon is a major problem in Schuyler County |
| Scott | Zone One (High) | 12.0 | Radon is an extreme problem in Scott County |
| Shelby | Zone Two (Mid) | 4.2 | Radon is a major problem in Shelby County |
| Saint Clair (St. Clair) | Zone Two (Mid) | 4.4 | Radon is a major problem in Saint Clair County |
| Stark | Zone One (High) | 11.1 | Radon is an extreme problem in Stark County |
| Stephenson | Zone One (High) | 6.3 | Radon is a major problem in Stephenson County |
| Tazewell | Zone One (High) | 7.8 | Radon is a major problem in Tazewell County |
| Union | Zone Two (Mid) | 2.8 | Radon is a problem in Union County |
| Vermilion | Zone One (High) | 4.6 | Radon is a major problem in Vermilion County |
| Wabash | Zone Two (Mid) | 3.6 | Radon is a problem in Wabash County |
| Warren | Zone One (High) | 10.2 | Radon is an extreme problem in Warren County |
| Washington | Zone Two (Mid) | 3.2 | Radon is a problem in Washington County |
| Wayne | Zone Two (Mid) | 2.0 | Radon is a problem in Wayne County |
| White | Zone Two (Mid) | 2.5 | Radon is a problem in White County |
| Whiteside | Zone One (High) | 5.0 | Radon is a major problem in Whiteside County |
| Will | Zone Two (Mid) | 5.0 | Radon is a major problem in Will County |
| Williamson | Zone Two (Mid) | 1.9 | Radon is a problem in Williamson County |
| Winnebago | Zone One (High) | 3.9 | Radon is a major problem in Winnebago County |
| Woodford | Zone One (High) | 8.1 | Radon is an extreme problem in Woodford County |
Is Radon a Problem in Indiana?
| County Name | EPA Zone Designation (1=High, 2=Mid, 3=Low) | Average Radon Level (pCi/L) | Is Radon a Problem in this County? |
|---|---|---|---|
| Adams | Zone One (High) | 4.3 | Radon is a major problem in Adams County |
| Allen | Zone One (High) | 4.6 | Radon is a major problem in Allen County |
| Bartholomew | Zone One (High) | 3.5 | Radon is a major problem in Bartholomew County |
| Benton | Zone One (High) | 6.0 | Radon is a major problem in Benton County |
| Blackford | Zone One (High) | 3.1 | Radon is a major problem in Blackford County |
| Boone | Zone One (High) | 3.7 | Radon is a major problem in Boone County |
| Brown | Zone Two (Mid) | 2.7 | Radon is a problem in Brown County |
| Carroll | Zone One (High) | 5.6 | Radon is a major problem in Carroll County |
| Cass | Zone One (High) | 5.1 | Radon is a major problem in Cass County |
| Clark | Zone One (High) | 6.2 | Radon is a major problem in Clark County |
| Clay | Zone Two (Mid) | 3.5 | Radon is a problem in Clay County |
| Clinton | Zone One (High) | 4.7 | Radon is a major problem in Clinton County |
| Crawford | Zone Two (Mid) | 4.0 | Radon is a major problem in Crawford County |
| Daviess | Zone Two (Mid) | 3.0 | Radon is a problem in Daviess County |
| Dearborn | Zone Two (Mid) | 3.5 | Radon is a problem in Dearborn County |
| Decatur | Zone One (High) | 4.9 | Radon is a major problem in Decatur County |
| DeKalb | Zone One (High) | 5.1 | Radon is a major problem in DeKalb County |
| Delaware | Zone One (High) | 3.4 | Radon is a major problem in Delaware County |
| Dubois | Zone Two (Mid) | 4.4 | Radon is a major problem in Dubois County |
| Elkhart | Zone One (High) | 4.3 | Radon is a major problem in Elkhart County |
| Fayette | Zone One (High) | 5.9 | Radon is a major problem in Fayette County |
| Floyd | Zone Two (Mid) | 5.1 | Radon is a major problem in Floyd County |
| Fountain | Zone One (High) | 9.6 | Radon is an extreme problem in Fountain County |
| Franklin | Zone Two (Mid) | 2.7 | Radon is a problem in Franklin County |
| Fulton | Zone One (High) | 8.3 | Radon is an extreme problem in Fulton County |
| Gibson | Zone Two (Mid) | 4.2 | Radon is a major problem in Gibson County |
| Grant | Zone One (High) | 5.0 | Radon is a major problem in Grant County |
| Greene | Zone Two (Mid) | 2.3 | Radon is a problem in Greene County |
| Hamilton | Zone One (High) | 3.2 | Radon is a major problem in Hamilton County |
| Hancock | Zone One (High) | 2.4 | Radon is a major problem in Hancock County |
| Harrison | Zone One (High) | 7.8 | Radon is a major problem in Harrison County |
| Hendricks | Zone One (High) | 2.8 | Radon is a major problem in Hendricks County |
| Henry | Zone One (High) | 6.9 | Radon is a major problem in Henry County |
| Howard | Zone One (High) | 4.4 | Radon is a major problem in Howard County |
| Huntington | Zone One (High) | 4.6 | Radon is a major problem in Huntington County |
| Jackson | Zone Two (Mid) | 2.8 | Radon is a problem in Jackson County |
| Jasper | Zone Two (Mid) | 2.3 | Radon is a problem in Jasper County |
| Jay | Zone One (High) | 4.3 | Radon is a major problem in Jay County |
| Jefferson | Zone Two (Mid) | 7.7 | Radon is a major problem in Jefferson County |
| Jennings | Zone One (High) | 4.6 | Radon is a major problem in Jennings County |
| Johnson | Zone One (High) | 2.8 | Radon is a major problem in Johnson County |
| Knox | Zone Two (Mid) | 3.3 | Radon is a problem in Knox County |
| Kosciusko | Zone One (High) | 4.4 | Radon is a major problem in Kosciusko County |
| LaPorte | Zone Two (Mid) | 7.3 | Radon is a major problem in LaPorte County |
| LaGrange | Zone One (High) | 5.5 | Radon is a major problem in LaGrange County |
| Lake | Zone Two (Mid) | 2.0 | Radon is a problem in Lake County |
| Lawrence | Zone One (High) | 4.9 | Radon is a major problem in Lawrence County |
| Madison | Zone One (High) | 4.5 | Radon is a major problem in Madison County |
| Marion | Zone One (High) | 3.7 | Radon is a major problem in Marion County |
| Marshall | Zone One (High) | 6.9 | Radon is a major problem in Marshall County |
| Martin | Zone Two (Mid) | 4.6 | Radon is a major problem in Martin County |
| Miami | Zone One (High) | 6.6 | Radon is a major problem in Miami County |
| Monroe | Zone One (High) | 3.9 | Radon is a major problem in Monroe County |
| Montgomery | Zone One (High) | 3.7 | Radon is a major problem in Montgomery County |
| Morgan | Zone Two (Mid) | 3.8 | Radon is a problem in Morgan County |
| Newton | Zone Two (Mid) | 2.4 | Radon is a problem in Newton County |
| Noble | Zone One (High) | 7.3 | Radon is a major problem in Noble County |
| Ohio | Zone Two (Mid) | 3.7 | Radon is a problem in Ohio County |
| Orange | Zone One (High) | 5.4 | Radon is a major problem in Orange County |
| Owen | Zone Two (Mid) | 3.6 | Radon is a problem in Owen County |
| Parke | Zone Two (Mid) | 4.8 | Radon is a major problem in Parke County |
| Perry | Zone Two (Mid) | 1.5 | Radon is a problem in Perry County |
| Pike | Zone Two (Mid) | 2.3 | Radon is a problem in Pike County |
| Porter | Zone Two (Mid) | 5.7 | Radon is a major problem in Porter County |
| Posey | Zone Two (Mid) | 3.6 | Radon is a problem in Posey County |
| Pulaski | Zone Two (Mid) | 3.3 | Radon is a problem in Pulaski County |
| Putnam | Zone One (High) | 4.2 | Radon is a major problem in Putnam County |
| Randolph | Zone One (High) | 3.8 | Radon is a major problem in Randolph County |
| Ripley | Zone Two (Mid) | 3.1 | Radon is a problem in Ripley County |
| Rush | Zone One (High) | 6.8 | Radon is a major problem in Rush County |
| Saint Joseph (St. Joseph) | Zone One (High) | 3.4 | Radon is a major problem in Saint Joseph County |
| Scott | Zone One (High) | 3.1 | Radon is a major problem in Scott County |
| Shelby | Zone One (High) | 5.9 | Radon is a major problem in Shelby County |
| Spencer | Zone Two (Mid) | 5.0 | Radon is a major problem in Spencer County |
| Starke | Zone Two (Mid) | 2.3 | Radon is a problem in Starke County |
| Steuben | Zone One (High) | 5.3 | Radon is a major problem in Steuben County |
| Sullivan | Zone Two (Mid) | 3.5 | Radon is a problem in Sullivan County |
| Switzerland | Zone Two (Mid) | 1.7 | Radon is a problem in Switzerland County |
| Tippecanoe | Zone One (High) | 4.3 | Radon is a major problem in Tippecanoe County |
| Tipton | Zone One (High) | 3.8 | Radon is a major problem in Tipton County |
| Union | Zone One (High) | 6.3 | Radon is a major problem in Union County |
| Vanderburgh | Zone Two (Mid) | 2.5 | Radon is a problem in Vanderburgh County |
| Vermillion | Zone One (High) | 7.2 | Radon is a major problem in Vermillion County |
| Vigo | Zone Two (Mid) | 3.7 | Radon is a problem in Vigo County |
| Wabash | Zone One (High) | 5.1 | Radon is a major problem in Wabash County |
| Warren | Zone One (High) | 4.3 | Radon is a major problem in Warren County |
| Warrick | Zone Two (Mid) | 1.9 | Radon is a problem in Warrick County |
| Washington | Zone One (High) | 4.9 | Radon is a major problem in Washington County |
| Wayne | Zone One (High) | 4.9 | Radon is a major problem in Wayne County |
| Wells | Zone One (High) | 5.1 | Radon is a major problem in Wells County |
| White | Zone One (High) | 3.4 | Radon is a major problem in White County |
| Whitley | Zone One (High) | 5.8 | Radon is a major problem in Whitley County |
Is Radon a Problem in Iowa?
| County Name | EPA Zone Designation (1=High, 2=Mid, 3=Low) | Average Radon Level (pCi/L) | Is Radon a Problem in this County? |
|---|---|---|---|
| Adair | Zone One (High) | 8.9 | Radon is an extreme problem in Adair County |
| Adams | Zone One (High) | 5.9 | Radon is a major problem in Adams County |
| Allamakee | Zone One (High) | 8.0 | Radon is an extreme problem in Allamakee County |
| Appanoose | Zone One (High) | 4.0 | Radon is a major problem in Appanoose County |
| Audubon | Zone One (High) | 9.5 | Radon is an extreme problem in Audubon County |
| Benton | Zone One (High) | 7.4 | Radon is a major problem in Benton County |
| Black Hawk | Zone One (High) | 3.9 | Radon is a major problem in Black Hawk County |
| Boone | Zone One (High) | 6.7 | Radon is a major problem in Boone County |
| Bremer | Zone One (High) | 4.7 | Radon is a major problem in Bremer County |
| Buchanan | Zone One (High) | 7.6 | Radon is a major problem in Buchanan County |
| Buena Vista | Zone One (High) | 9.2 | Radon is an extreme problem in Buena Vista County |
| Butler | Zone One (High) | 5.9 | Radon is a major problem in Butler County |
| Calhoun | Zone One (High) | 6.5 | Radon is a major problem in Calhoun County |
| Carroll | Zone One (High) | 10.1 | Radon is an extreme problem in Carroll County |
| Cass | Zone One (High) | 8.1 | Radon is an extreme problem in Cass County |
| Cedar | Zone One (High) | 5.9 | Radon is a major problem in Cedar County |
| Cerro Gordo | Zone One (High) | 5.6 | Radon is a major problem in Cerro Gordo County |
| Cherokee | Zone One (High) | 9.1 | Radon is an extreme problem in Cherokee County |
| Chickasaw | Zone One (High) | 6.7 | Radon is a major problem in Chickasaw County |
| Clarke | Zone One (High) | 3.6 | Radon is a major problem in Clarke County |
| Clay | Zone One (High) | 10.2 | Radon is an extreme problem in Clay County |
| Clayton | Zone One (High) | 6.2 | Radon is a major problem in Clayton County |
| Clinton | Zone One (High) | 5.6 | Radon is a major problem in Clinton County |
| Crawford | Zone One (High) | 9.3 | Radon is an extreme problem in Crawford County |
| Dallas | Zone One (High) | 5.3 | Radon is a major problem in Dallas County |
| Davis | Zone One (High) | 4.1 | Radon is a major problem in Davis County |
| Decatur | Zone One (High) | 2.8 | Radon is a major problem in Decatur County |
| Delaware | Zone One (High) | 6.3 | Radon is a major problem in Delaware County |
| Des Moines | Zone One (High) | 3.9 | Radon is a major problem in Des Moines County |
| Dickinson | Zone One (High) | 8.6 | Radon is an extreme problem in Dickinson County |
| Dubuque | Zone One (High) | 4.7 | Radon is a major problem in Dubuque County |
| Emmet | Zone One (High) | 6.9 | Radon is a major problem in Emmet County |
| Fayette | Zone One (High) | 6.7 | Radon is a major problem in Fayette County |
| Floyd | Zone One (High) | 6.4 | Radon is a major problem in Floyd County |
| Franklin | Zone One (High) | 6.0 | Radon is a major problem in Franklin County |
| Fremont | Zone One (High) | 8.9 | Radon is an extreme problem in Fremont County |
| Greene | Zone One (High) | 7.4 | Radon is a major problem in Greene County |
| Grundy | Zone One (High) | 7.8 | Radon is a major problem in Grundy County |
| Guthrie | Zone One (High) | 8.7 | Radon is an extreme problem in Guthrie County |
| Hamilton | Zone One (High) | 4.9 | Radon is a major problem in Hamilton County |
| Hancock | Zone One (High) | 8.2 | Radon is an extreme problem in Hancock County |
| Hardin | Zone One (High) | 6.3 | Radon is a major problem in Hardin County |
| Harrison | Zone One (High) | 6.8 | Radon is a major problem in Harrison County |
| Henry | Zone One (High) | 5.0 | Radon is a major problem in Henry County |
| Howard | Zone One (High) | 7.4 | Radon is a major problem in Howard County |
| Humboldt | Zone One (High) | 7.0 | Radon is a major problem in Humboldt County |
| Ida | Zone One (High) | 9.5 | Radon is an extreme problem in Ida County |
| Iowa | Zone One (High) | 5.8 | Radon is a major problem in Iowa County |
| Jackson | Zone One (High) | 6.0 | Radon is a major problem in Jackson County |
| Jasper | Zone One (High) | 8.2 | Radon is an extreme problem in Jasper County |
| Jefferson | Zone One (High) | 5.4 | Radon is a major problem in Jefferson County |
| Johnson | Zone One (High) | 4.2 | Radon is a major problem in Johnson County |
| Jones | Zone One (High) | 6.1 | Radon is a major problem in Jones County |
| Keokuk | Zone One (High) | 6.2 | Radon is a major problem in Keokuk County |
| Kossuth | Zone One (High) | 6.3 | Radon is a major problem in Kossuth County |
| Lee | Zone One (High) | 4.4 | Radon is a major problem in Lee County |
| Linn | Zone One (High) | 4.1 | Radon is a major problem in Linn County |
| Louisa | Zone One (High) | 4.5 | Radon is a major problem in Louisa County |
| Lucas | Zone One (High) | 4.9 | Radon is a major problem in Lucas County |
| Lyon | Zone One (High) | 9.3 | Radon is an extreme problem in Lyon County |
| Madison | Zone One (High) | 7.1 | Radon is a major problem in Madison County |
| Mahaska | Zone One (High) | 5.6 | Radon is a major problem in Mahaska County |
| Marion | Zone One (High) | 6.7 | Radon is a major problem in Marion County |
| Marshall | Zone One (High) | 6.8 | Radon is a major problem in Marshall County |
| Mills | Zone One (High) | 6.1 | Radon is a major problem in Mills County |
| Mitchell | Zone One (High) | 7.7 | Radon is a major problem in Mitchell County |
| Monona | Zone One (High) | 8.5 | Radon is an extreme problem in Monona County |
| Monroe | Zone One (High) | 2.8 | Radon is a major problem in Monroe County |
| Montgomery | Zone One (High) | 8.1 | Radon is an extreme problem in Montgomery County |
| Muscatine | Zone One (High) | 4.7 | Radon is a major problem in Muscatine County |
| O’Brien | Zone One (High) | 9.2 | Radon is an extreme problem in O’Brien County |
| Osceola | Zone One (High) | 7.6 | Radon is a major problem in Osceola County |
| Page | Zone One (High) | 8.8 | Radon is an extreme problem in Page County |
| Palo Alto | Zone One (High) | 7.0 | Radon is a major problem in Palo Alto County |
| Plymouth | Zone One (High) | 9.0 | Radon is an extreme problem in Plymouth County |
| Pocahontas | Zone One (High) | 8.8 | Radon is an extreme problem in Pocahontas County |
| Polk | Zone One (High) | 5.2 | Radon is a major problem in Polk County |
| Pottawattamie | Zone One (High) | 5.4 | Radon is a major problem in Pottawattamie County |
| Poweshiek | Zone One (High) | 7.1 | Radon is a major problem in Poweshiek County |
| Ringgold | Zone One (High) | 3.8 | Radon is a major problem in Ringgold County |
| Sac | Zone One (High) | 9.0 | Radon is an extreme problem in Sac County |
| Scott | Zone One (High) | 4.4 | Radon is a major problem in Scott County |
| Shelby | Zone One (High) | 9.8 | Radon is an extreme problem in Shelby County |
| Sioux | Zone One (High) | 10.7 | Radon is an extreme problem in Sioux County |
| Story | Zone One (High) | 4.8 | Radon is a major problem in Story County |
| Tama | Zone One (High) | 6.2 | Radon is a major problem in Tama County |
| Taylor | Zone One (High) | 6.1 | Radon is a major problem in Taylor County |
| Union | Zone One (High) | 5.5 | Radon is a major problem in Union County |
| Van Buren | Zone One (High) | 2.9 | Radon is a major problem in Van Buren County |
| Wapello | Zone One (High) | 3.5 | Radon is a major problem in Wapello County |
| Warren | Zone One (High) | 7.1 | Radon is a major problem in Warren County |
| Washington | Zone One (High) | 6.6 | Radon is a major problem in Washington County |
| Wayne | Zone One (High) | 3.6 | Radon is a major problem in Wayne County |
| Webster | Zone One (High) | 7.0 | Radon is a major problem in Webster County |
| Winnebago | Zone One (High) | 7.8 | Radon is a major problem in Winnebago County |
| Winneshiek | Zone One (High) | 8.0 | Radon is an extreme problem in Winneshiek County |
| Woodbury | Zone One (High) | 6.7 | Radon is a major problem in Woodbury County |
| Worth | Zone One (High) | 6.0 | Radon is a major problem in Worth County |
| Wright | Zone One (High) | 7.4 | Radon is a major problem in Wright County |
Is Radon a Problem in Kansas?
| County Name | EPA Zone Designation (1=High, 2=Mid, 3=Low) | Average Radon Level (pCi/L) | Is Radon a Problem in this County? |
|---|---|---|---|
| Allen | Zone Two (Mid) | 2.8 | Radon is a problem in Allen County |
| Anderson | Zone Two (Mid) | 4.9 | Radon is a major problem in Anderson County |
| Atchison | Zone One (High) | 5.3 | Radon is a major problem in Atchison County |
| Barber | Zone Two (Mid) | 4.3 | Radon is a major problem in Barber County |
| Barton | Zone One (High) | 4.9 | Radon is a major problem in Barton County |
| Bourbon | Zone Two (Mid) | 6.1 | Radon is a major problem in Bourbon County |
| Brown | Zone One (High) | 5.6 | Radon is a major problem in Brown County |
| Butler | Zone Two (Mid) | 4.6 | Radon is a major problem in Butler County |
| Chase | Zone Two (Mid) | 4.7 | Radon is a major problem in Chase County |
| Chautauqua | Zone Two (Mid) | 1.0 | Radon is a problem in Chautauqua County |
| Cherokee | Zone Two (Mid) | 4.8 | Radon is a major problem in Cherokee County |
| Cheyenne | Zone One (High) | 4.7 | Radon is a major problem in Cheyenne County |
| Clark | Zone Two (Mid) | 5.6 | Radon is a major problem in Clark County |
| Clay | Zone One (High) | 6.4 | Radon is a major problem in Clay County |
| Cloud | Zone One (High) | 6.6 | Radon is a major problem in Cloud County |
| Coffey | Zone Two (Mid) | 3.7 | Radon is a problem in Coffey County |
| Comanche | Zone Two (Mid) | 4.0 | Radon is a major problem in Comanche County |
| Cowley | Zone Two (Mid) | 5.6 | Radon is a major problem in Cowley County |
| Crawford | Zone Two (Mid) | 4.7 | Radon is a major problem in Crawford County |
| Decatur | Zone One (High) | 5.5 | Radon is a major problem in Decatur County |
| Dickinson | Zone One (High) | 5.6 | Radon is a major problem in Dickinson County |
| Doniphan | Zone Two (Mid) | 6.7 | Radon is a major problem in Doniphan County |
| Douglas | Zone One (High) | 4.0 | Radon is a major problem in Douglas County |
| Edwards | Zone Two (Mid) | 3.8 | Radon is a problem in Edwards County |
| Elk | Zone Two (Mid) | 2.4 | Radon is a problem in Elk County |
| Ellis | Zone One (High) | 5.9 | Radon is a major problem in Ellis County |
| Ellsworth | Zone One (High) | 13.8 | Radon is an extreme problem in Ellsworth County |
| Finney | Zone One (High) | 4.3 | Radon is a major problem in Finney County |
| Ford | Zone One (High) | 4.9 | Radon is a major problem in Ford County |
| Franklin | Zone Two (Mid) | 5.0 | Radon is a major problem in Franklin County |
| Geary | Zone One (High) | 5.2 | Radon is a major problem in Geary County |
| Gove | Zone One (High) | 6.7 | Radon is a major problem in Gove County |
| Graham | Zone One (High) | 5.2 | Radon is a major problem in Graham County |
| Grant | Zone One (High) | 3.8 | Radon is a major problem in Grant County |
| Gray | Zone One (High) | 5.8 | Radon is a major problem in Gray County |
| Greeley | Zone One (High) | 6.5 | Radon is a major problem in Greeley County |
| Greenwood | Zone Two (Mid) | 4.0 | Radon is a major problem in Greenwood County |
| Hamilton | Zone One (High) | 4.5 | Radon is a major problem in Hamilton County |
| Harper | Zone Two (Mid) | 3.1 | Radon is a problem in Harper County |
| Harvey | Zone Two (Mid) | 4.3 | Radon is a major problem in Harvey County |
| Haskell | Zone One (High) | 5.2 | Radon is a major problem in Haskell County |
| Hodgeman | Zone One (High) | 5.1 | Radon is a major problem in Hodgeman County |
| Jackson | Zone One (High) | 2.5 | Radon is a major problem in Jackson County |
| Jefferson | Zone Two (Mid) | 4.5 | Radon is a major problem in Jefferson County |
| Jewell | Zone One (High) | 9.7 | Radon is an extreme problem in Jewell County |
| Johnson | Zone One (High) | 5.6 | Radon is a major problem in Johnson County |
| Kearny | Zone One (High) | 5.0 | Radon is a major problem in Kearny County |
| Kingman | Zone One (High) | 2.8 | Radon is a major problem in Kingman County |
| Kiowa | Zone One (High) | 6.2 | Radon is a major problem in Kiowa County |
| Labette | Zone Two (Mid) | 2.6 | Radon is a problem in Labette County |
| Lane | Zone One (High) | 5.8 | Radon is a major problem in Lane County |
| Leavenworth | Zone One (High) | 4.2 | Radon is a major problem in Leavenworth County |
| Lincoln | Zone One (High) | 6.1 | Radon is a major problem in Lincoln County |
| Linn | Zone Two (Mid) | 5.9 | Radon is a major problem in Linn County |
| Logan | Zone One (High) | 5.3 | Radon is a major problem in Logan County |
| Lyon | Zone Two (Mid) | 5.0 | Radon is a major problem in Lyon County |
| Marion | Zone One (High) | 5.5 | Radon is a major problem in Marion County |
| Marshall | Zone One (High) | 7.5 | Radon is a major problem in Marshall County |
| McPherson | Zone One (High) | 6.0 | Radon is a major problem in McPherson County |
| Meade | Zone One (High) | 6.2 | Radon is a major problem in Meade County |
| Miami | Zone Two (Mid) | 6.4 | Radon is a major problem in Miami County |
| Mitchell | Zone One (High) | 7.9 | Radon is a major problem in Mitchell County |
| Montgomery | Zone Two (Mid) | 2.0 | Radon is a problem in Montgomery County |
| Morris | Zone Two (Mid) | 3.4 | Radon is a problem in Morris County |
| Morton | Zone Two (Mid) | 3.3 | Radon is a problem in Morton County |
| Nemaha | Zone One (High) | 6.9 | Radon is a major problem in Nemaha County |
| Neosho | Zone Two (Mid) | 2.1 | Radon is a problem in Neosho County |
| Ness | Zone One (High) | 7.3 | Radon is a major problem in Ness County |
| Norton | Zone One (High) | 5.7 | Radon is a major problem in Norton County |
| Osage | Zone Two (Mid) | 4.8 | Radon is a major problem in Osage County |
| Osborne | Zone One (High) | 5.9 | Radon is a major problem in Osborne County |
| Ottawa | Zone One (High) | 5.9 | Radon is a major problem in Ottawa County |
| Pawnee | Zone One (High) | 5.7 | Radon is a major problem in Pawnee County |
| Phillips | Zone One (High) | 6.0 | Radon is a major problem in Phillips County |
| Pottawatomie | Zone One (High) | 5.7 | Radon is a major problem in Pottawatomie County |
| Pratt | Zone One (High) | 3.4 | Radon is a major problem in Pratt County |
| Rawlins | Zone One (High) | 6.7 | Radon is a major problem in Rawlins County |
| Reno | Zone Two (Mid) | 3.5 | Radon is a problem in Reno County |
| Republic | Zone One (High) | 7.8 | Radon is a major problem in Republic County |
| Rice | Zone One (High) | 4.6 | Radon is a major problem in Rice County |
| Riley | Zone One (High) | 5.6 | Radon is a major problem in Riley County |
| Rooks | Zone One (High) | 6.9 | Radon is a major problem in Rooks County |
| Rush | Zone One (High) | 7.6 | Radon is a major problem in Rush County |
| Russell | Zone One (High) | 6.8 | Radon is a major problem in Russell County |
| Saline | Zone One (High) | 5.8 | Radon is a major problem in Saline County |
| Scott | Zone One (High) | 7.6 | Radon is a major problem in Scott County |
| Sedgwick | Zone Two (Mid) | 3.2 | Radon is a problem in Sedgwick County |
| Seward | Zone Two (Mid) | 2.4 | Radon is a problem in Seward County |
| Shawnee | Zone Two (Mid) | 4.7 | Radon is a major problem in Shawnee County |
| Sheridan | Zone One (High) | 6.4 | Radon is a major problem in Sheridan County |
| Sherman | Zone One (High) | 5.1 | Radon is a major problem in Sherman County |
| Smith | Zone One (High) | 6.8 | Radon is a major problem in Smith County |
| Stafford | Zone Two (Mid) | 4.5 | Radon is a major problem in Stafford County |
| Stanton | Zone One (High) | 6.9 | Radon is a major problem in Stanton County |
| Stevens | Zone Two (Mid) | 5.5 | Radon is a major problem in Stevens County |
| Sumner | Zone Two (Mid) | 4.4 | Radon is a major problem in Sumner County |
| Thomas | Zone One (High) | 5.5 | Radon is a major problem in Thomas County |
| Trego | Zone One (High) | 6.5 | Radon is a major problem in Trego County |
| Wabaunsee | Zone Two (Mid) | 5.6 | Radon is a major problem in Wabaunsee County |
| Wallace | Zone One (High) | 5.5 | Radon is a major problem in Wallace County |
| Washington | Zone One (High) | 7.3 | Radon is a major problem in Washington County |
| Wichita | Zone One (High) | 6.6 | Radon is a major problem in Wichita County |
| Wilson | Zone Two (Mid) | 3.8 | Radon is a problem in Wilson County |
| Woodson | Zone Two (Mid) | 1.6 | Radon is a problem in Woodson County |
| Wyandotte | Zone One (High) | 4.6 | Radon is a major problem in Wyandotte County |
Is Radon a Problem in Kentucky?
| County Name | EPA Zone Designation (1=High, 2=Mid, 3=Low) | Average Radon Level (pCi/L) | Is Radon a Problem in this County? |
|---|---|---|---|
| Adair | Zone One (High) | 3.0 | Radon is a major problem in Adair County |
| Allen | Zone One (High) | 3.2 | Radon is a major problem in Allen County |
| Anderson | Zone Two (Mid) | 2.4 | Radon is a problem in Anderson County |
| Ballard | Zone Three (Low) | 1.5 | Radon is a minor problem in Ballard County |
| Barren | Zone One (High) | 6.0 | Radon is a major problem in Barren County |
| Bath | Zone Two (Mid) | 1.9 | Radon is a problem in Bath County |
| Bell | Zone Two (Mid) | 1.0 | Radon is a problem in Bell County |
| Boone | Zone Two (Mid) | 3.8 | Radon is a problem in Boone County |
| Bourbon | Zone One (High) | 7.0 | Radon is a major problem in Bourbon County |
| Boyd | Zone Two (Mid) | 3.7 | Radon is a problem in Boyd County |
| Boyle | Zone One (High) | 5.3 | Radon is a major problem in Boyle County |
| Bracken | Zone Two (Mid) | 1.5 | Radon is a problem in Bracken County |
| Breathitt | Zone Two (Mid) | 2.4 | Radon is a problem in Breathitt County |
| Breckinridge | Zone Two (Mid) | 7.4 | Radon is a major problem in Breckinridge County |
| Bullitt | Zone One (High) | 6.3 | Radon is a major problem in Bullitt County |
| Butler | Zone Two (Mid) | 2.1 | Radon is a problem in Butler County |
| Caldwell | Zone Two (Mid) | 4.9 | Radon is a major problem in Caldwell County |
| Calloway | Zone Three (Low) | 1.4 | Radon is a minor problem in Calloway County |
| Campbell | Zone Two (Mid) | 2.6 | Radon is a problem in Campbell County |
| Carlisle | Zone Three (Low) | 0.8 | Radon is a minor problem in Carlisle County |
| Carroll | Zone Two (Mid) | 2.3 | Radon is a problem in Carroll County |
| Carter | Zone Two (Mid) | 3.0 | Radon is a problem in Carter County |
| Casey | Zone One (High) | 4.3 | Radon is a major problem in Casey County |
| Christian | Zone Two (Mid) | 5.3 | Radon is a major problem in Christian County |
| Clark | Zone One (High) | 3.4 | Radon is a major problem in Clark County |
| Clay | Zone Two (Mid) | 1.9 | Radon is a problem in Clay County |
| Clinton | Zone Two (Mid) | 5.4 | Radon is a major problem in Clinton County |
| Crittenden | Zone Two (Mid) | 1.7 | Radon is a problem in Crittenden County |
| Cumberland | Zone One (High) | 5.5 | Radon is a major problem in Cumberland County |
| Daviess | Zone Two (Mid) | 2.6 | Radon is a problem in Daviess County |
| Edmonson | Zone Two (Mid) | 1.5 | Radon is a problem in Edmonson County |
| Elliott | Zone Two (Mid) | 4.5 | Radon is a major problem in Elliott County |
| Estill | Zone Two (Mid) | 7.5 | Radon is a major problem in Estill County |
| Fayette | Zone One (High) | 7.7 | Radon is a major problem in Fayette County |
| Fleming | Zone Two (Mid) | 1.5 | Radon is a problem in Fleming County |
| Floyd | Zone Two (Mid) | 2.5 | Radon is a problem in Floyd County |
| Franklin | Zone One (High) | 4.8 | Radon is a major problem in Franklin County |
| Fulton | Zone Three (Low) | 2.1 | Radon is a problem in Fulton County |
| Gallatin | Zone Two (Mid) | 3.9 | Radon is a problem in Gallatin County |
| Garrard | Zone Two (Mid) | 3.4 | Radon is a problem in Garrard County |
| Grant | Zone Two (Mid) | 2.6 | Radon is a problem in Grant County |
| Graves | Zone Three (Low) | 1.6 | Radon is a minor problem in Graves County |
| Grayson | Zone Two (Mid) | 3.9 | Radon is a problem in Grayson County |
| Green | Zone One (High) | 5.1 | Radon is a major problem in Green County |
| Greenup | Zone Two (Mid) | 3.2 | Radon is a problem in Greenup County |
| Hancock | Zone Two (Mid) | 2.8 | Radon is a problem in Hancock County |
| Hardin | Zone Two (Mid) | 6.4 | Radon is a major problem in Hardin County |
| Harlan | Zone Two (Mid) | 2.7 | Radon is a problem in Harlan County |
| Harrison | Zone One (High) | 4.0 | Radon is a major problem in Harrison County |
| Hart | Zone One (High) | 20.0 | Radon is an extreme problem in Hart County |
| Henderson | Zone Two (Mid) | 2.1 | Radon is a problem in Henderson County |
| Henry | Zone Two (Mid) | 2.8 | Radon is a problem in Henry County |
| Hickman | Zone Three (Low) | 0.8 | Radon is a minor problem in Hickman County |
| Hopkins | Zone Two (Mid) | 3.4 | Radon is a problem in Hopkins County |
| Jackson | Zone Two (Mid) | 3.4 | Radon is a problem in Jackson County |
| Jefferson | Zone One (High) | 6.4 | Radon is a major problem in Jefferson County |
| Jessamine | Zone One (High) | 7.1 | Radon is a major problem in Jessamine County |
| Johnson | Zone Two (Mid) | 1.3 | Radon is a problem in Johnson County |
| Kenton | Zone Two (Mid) | 2.7 | Radon is a problem in Kenton County |
| Knott | Zone Two (Mid) | 2.5 | Radon is a problem in Knott County |
| Knox | Zone Two (Mid) | 1.8 | Radon is a problem in Knox County |
| LaRue | Zone Two (Mid) | 4.4 | Radon is a major problem in LaRue County |
| Laurel | Zone Two (Mid) | 2.6 | Radon is a problem in Laurel County |
| Lawrence | Zone Two (Mid) | 2.7 | Radon is a problem in Lawrence County |
| Lee | Zone Two (Mid) | 2.1 | Radon is a problem in Lee County |
| Leslie | Zone Two (Mid) | 1.2 | Radon is a problem in Leslie County |
| Letcher | Zone Two (Mid) | 2.1 | Radon is a problem in Letcher County |
| Lewis | Zone Two (Mid) | 6.3 | Radon is a major problem in Lewis County |
| Lincoln | Zone One (High) | 8.0 | Radon is an extreme problem in Lincoln County |
| Livingston | Zone Two (Mid) | 1.2 | Radon is a problem in Livingston County |
| Logan | Zone Two (Mid) | 4.8 | Radon is a major problem in Logan County |
| Lyon | Zone Two (Mid) | 1.7 | Radon is a problem in Lyon County |
| McCracken | Zone Three (Low) | 1.9 | Radon is a minor problem in McCracken County |
| McCreary | Zone Two (Mid) | 1.5 | Radon is a problem in McCreary County |
| McLean | Zone Two (Mid) | 2.7 | Radon is a problem in McLean County |
| Madison | Zone Two (Mid) | 5.4 | Radon is a major problem in Madison County |
| Magoffin | Zone Two (Mid) | 1.5 | Radon is a problem in Magoffin County |
| Marion | Zone One (High) | 9.8 | Radon is an extreme problem in Marion County |
| Marshall | Zone Three (Low) | 2.1 | Radon is a problem in Marshall County |
| Martin | Zone Two (Mid) | 1.1 | Radon is a problem in Martin County |
| Mason | Zone Two (Mid) | 2.5 | Radon is a problem in Mason County |
| Meade | Zone Two (Mid) | 13.5 | Radon is an extreme problem in Meade County |
| Menifee | Zone Two (Mid) | 2.5 | Radon is a problem in Menifee County |
| Mercer | Zone One (High) | 4.9 | Radon is a major problem in Mercer County |
| Metcalfe | Zone One (High) | 2.9 | Radon is a major problem in Metcalfe County |
| Monroe | Zone One (High) | 4.1 | Radon is a major problem in Monroe County |
| Montgomery | Zone Two (Mid) | 4.9 | Radon is a major problem in Montgomery County |
| Morgan | Zone Two (Mid) | 1.7 | Radon is a problem in Morgan County |
| Muhlenberg | Zone Two (Mid) | 2.7 | Radon is a problem in Muhlenberg County |
| Nelson | Zone One (High) | 11.2 | Radon is an extreme problem in Nelson County |
| Nicholas | Zone Two (Mid) | 2.3 | Radon is a problem in Nicholas County |
| Ohio | Zone Two (Mid) | 2.2 | Radon is a problem in Ohio County |
| Oldham | Zone Two (Mid) | 3.8 | Radon is a problem in Oldham County |
| Owen | Zone Two (Mid) | 3.3 | Radon is a problem in Owen County |
| Owsley | Zone Two (Mid) | 10.4 | Radon is an extreme problem in Owsley County |
| Pendleton | Zone One (High) | 3.1 | Radon is a major problem in Pendleton County |
| Perry | Zone Two (Mid) | 2.4 | Radon is a problem in Perry County |
| Pike | Zone Two (Mid) | 2.0 | Radon is a problem in Pike County |
| Powell | Zone Two (Mid) | 4.7 | Radon is a major problem in Powell County |
| Pulaski | Zone One (High) | 7.6 | Radon is a major problem in Pulaski County |
| Robertson | Zone One (High) | 0.8 | Radon is a major problem in Robertson County |
| Rockcastle | Zone Two (Mid) | 4.4 | Radon is a major problem in Rockcastle County |
| Rowan | Zone Two (Mid) | 2.0 | Radon is a problem in Rowan County |
| Russell | Zone One (High) | 2.2 | Radon is a major problem in Russell County |
| Scott | Zone One (High) | 6.7 | Radon is a major problem in Scott County |
| Shelby | Zone Two (Mid) | 3.3 | Radon is a problem in Shelby County |
| Simpson | Zone Two (Mid) | 4.4 | Radon is a major problem in Simpson County |
| Spencer | Zone Two (Mid) | 3.2 | Radon is a problem in Spencer County |
| Taylor | Zone One (High) | 5.8 | Radon is a major problem in Taylor County |
| Todd | Zone Two (Mid) | 4.0 | Radon is a major problem in Todd County |
| Trigg | Zone Two (Mid) | 3.0 | Radon is a problem in Trigg County |
| Trimble | Zone Two (Mid) | 3.0 | Radon is a problem in Trimble County |
| Union | Zone Two (Mid) | 2.9 | Radon is a problem in Union County |
| Warren | Zone One (High) | 13.9 | Radon is an extreme problem in Warren County |
| Washington | Zone Two (Mid) | 2.2 | Radon is a problem in Washington County |
| Wayne | Zone Two (Mid) | 14.1 | Radon is an extreme problem in Wayne County |
| Webster | Zone Two (Mid) | 3.9 | Radon is a problem in Webster County |
| Whitley | Zone Two (Mid) | 1.3 | Radon is a problem in Whitley County |
| Wolfe | Zone Two (Mid) | 1.1 | Radon is a problem in Wolfe County |
| Woodford | Zone One (High) | 7.4 | Radon is a major problem in Woodford County |
Is Radon a Problem in Louisiana?
| Parish Name | EPA Zone Designation (1=High, 2=Mid, 3=Low) | Average Radon Level (pCi/L) | Is Radon a Problem in this County? |
|---|---|---|---|
| Acadia | Zone Three (Low) | 3.3 | Radon is a problem in Acadia Parish |
| Allen | Zone Three (Low) | No Data | Radon is a minor problem in Allen Parish |
| Ascension | Zone Three (Low) | 0.4 | Radon is a minor problem in Ascension Parish |
| Assumption | Zone Three (Low) | No Data | Radon is a minor problem in Assumption Parish |
| Avoyelles | Zone Three (Low) | 0.8 | Radon is a minor problem in Avoyelles Parish |
| Beauregard | Zone Three (Low) | 0.6 | Radon is a minor problem in Beauregard Parish |
| Bienville | Zone Three (Low) | No Data | Radon is a minor problem in Bienville Parish |
| Bossier | Zone Three (Low) | 1.4 | Radon is a minor problem in Bossier Parish |
| Caddo | Zone Three (Low) | 1.3 | Radon is a minor problem in Caddo Parish |
| Calcasieu | Zone Three (Low) | 0.2 | Radon is a minor problem in Calcasieu Parish |
| Caldwell | Zone Three (Low) | No Data | Radon is a minor problem in Caldwell Parish |
| Cameron | Zone Three (Low) | No Data | Radon is a minor problem in Cameron Parish |
| Catahoula | Zone Three (Low) | No Data | Radon is a minor problem in Catahoula Parish |
| Claiborne | Zone Three (Low) | No Data | Radon is a minor problem in Claiborne Parish |
| Concordia | Zone Three (Low) | 2.6 | Radon is a problem in Concordia Parish |
| De Soto | Zone Three (Low) | 1.3 | Radon is a minor problem in De Soto Parish |
| East Baton Rouge | Zone Three (Low) | 0.4 | Radon is a minor problem in East Baton Rouge Parish |
| East Carroll | Zone Three (Low) | No Data | Radon is a minor problem in East Carroll Parish |
| East Feliciana | Zone Three (Low) | 7.9 | Radon is a major problem in East Feliciana Parish |
| Evangeline | Zone Three (Low) | 1.9 | Radon is a minor problem in Evangeline Parish |
| Franklin | Zone Three (Low) | 3.3 | Radon is a problem in Franklin Parish |
| Grant | Zone Three (Low) | 0.8 | Radon is a minor problem in Grant Parish |
| Iberia | Zone Three (Low) | 0.9 | Radon is a minor problem in Iberia Parish |
| Iberville | Zone Three (Low) | 0.1 | Radon is a minor problem in Iberville Parish |
| Jackson | Zone Three (Low) | No Data | Radon is a minor problem in Jackson Parish |
| Jefferson | Zone Three (Low) | 1.2 | Radon is a minor problem in Jefferson Parish |
| Jefferson Davis | Zone Three (Low) | 0.3 | Radon is a minor problem in Jefferson Davis Parish |
| La Salle | Zone Three (Low) | 0.6 | Radon is a minor problem in La Salle Parish |
| Lafayette | Zone Three (Low) | 2.6 | Radon is a problem in Lafayette Parish |
| Lafourche | Zone Three (Low) | 0.6 | Radon is a minor problem in Lafourche Parish |
| Lincoln | Zone Three (Low) | 0.4 | Radon is a minor problem in Lincoln Parish |
| Livingston | Zone Three (Low) | 1.1 | Radon is a minor problem in Livingston Parish |
| Madison | Zone Three (Low) | No Data | Radon is a minor problem in Madison Parish |
| Morehouse | Zone Three (Low) | 2.0 | Radon is a problem in Morehouse Parish |
| Natchitoches | Zone Three (Low) | 0.5 | Radon is a minor problem in Natchitoches Parish |
| Orleans | Zone Three (Low) | 0.2 | Radon is a minor problem in Orleans Parish |
| Ouachita | Zone Three (Low) | 1.1 | Radon is a minor problem in Ouachita Parish |
| Plaquemines | Zone Three (Low) | 0.7 | Radon is a minor problem in Plaquemines Parish |
| Pointe Coupee | Zone Three (Low) | No Data | Radon is a minor problem in Pointe Coupee Parish |
| Rapides | Zone Three (Low) | 0.6 | Radon is a minor problem in Rapides Parish |
| Red River | Zone Three (Low) | No Data | Radon is a minor problem in Red River Parish |
| Richland | Zone Three (Low) | 0.9 | Radon is a minor problem in Richland Parish |
| Sabine | Zone Three (Low) | 0.3 | Radon is a minor problem in Sabine Parish |
| Saint Bernard (St. Bernard) | Zone Three (Low) | 0.4 | Radon is a minor problem in Saint Bernard Parish |
| Saint Charles (St. Charles) | Zone Three (Low) | 0.4 | Radon is a minor problem in Saint Charles Parish |
| Saint Helena (St. Helena) | Zone Three (Low) | No Data | Radon is a minor problem in Saint Helena Parish |
| Saint James (St. James) | Zone Three (Low) | 0.1 | Radon is a minor problem in Saint James Parish |
| Saint John The Baptist (St. John The Baptist) | Zone Three (Low) | 8.5 | Radon is an extreme problem in Saint John The Baptist Parish |
| Saint Landry (St. Landry) | Zone Three (Low) | 0.9 | Radon is a minor problem in Saint Landry Parish |
| Saint Martin (St. Martin) | Zone Three (Low) | 1.7 | Radon is a minor problem in Saint Martin Parish |
| Saint Mary (St. Mary) | Zone Three (Low) | 0.2 | Radon is a minor problem in Saint Mary Parish |
| Saint Tammany (St. Tammany) | Zone Three (Low) | 0.3 | Radon is a minor problem in Saint Tammany Parish |
| Tangipahoa | Zone Three (Low) | 0.1 | Radon is a minor problem in Tangipahoa Parish |
| Tensas | Zone Three (Low) | No Data | Radon is a minor problem in Tensas Parish |
| Terrebonne | Zone Three (Low) | 0.5 | Radon is a minor problem in Terrebonne Parish |
| Union | Zone Three (Low) | No Data | Radon is a minor problem in Union Parish |
| Vermilion | Zone Three (Low) | 0.3 | Radon is a minor problem in Vermilion Parish |
| Vernon | Zone Three (Low) | 0.4 | Radon is a minor problem in Vernon Parish |
| Washington | Zone Three (Low) | 0.6 | Radon is a minor problem in Washington Parish |
| Webster | Zone Three (Low) | 0.3 | Radon is a minor problem in Webster Parish |
| West Baton Rouge | Zone Three (Low) | No Data | Radon is a minor problem in West Baton Rouge Parish |
| West Carroll | Zone Three (Low) | 0.5 | Radon is a minor problem in West Carroll Parish |
| West Feliciana | Zone Three (Low) | 3.6 | Radon is a problem in West Feliciana Parish |
| Winn | Zone Three (Low) | 0.9 | Radon is a minor problem in Winn Parish |
Is Radon a Problem in Maine?
| County Name | EPA Zone Designation (1=High, 2=Mid, 3=Low) | Average Radon Level (pCi/L) | Is Radon a Problem in this County? |
|---|---|---|---|
| Androscoggin | Zone One (High) | 5.6 | Radon is a major problem in Androscoggin County |
| Aroostook | Zone One (High) | 5.7 | Radon is a major problem in Aroostook County |
| Cumberland | Zone One (High) | 7.9 | Radon is a major problem in Cumberland County |
| Franklin | Zone One (High) | 3.1 | Radon is a major problem in Franklin County |
| Hancock | Zone One (High) | 4.4 | Radon is a major problem in Hancock County |
| Kennebec | Zone One (High) | 4.2 | Radon is a major problem in Kennebec County |
| Knox | Zone Two (Mid) | 2.7 | Radon is a problem in Knox County |
| Lincoln | Zone One (High) | 4.0 | Radon is a major problem in Lincoln County |
| Oxford | Zone One (High) | 7.1 | Radon is a major problem in Oxford County |
| Penobscot | Zone One (High) | 2.7 | Radon is a major problem in Penobscot County |
| Piscataquis | Zone One (High) | 4.1 | Radon is a major problem in Piscataquis County |
| Sagadahoc | Zone Two (Mid) | 3.3 | Radon is a problem in Sagadahoc County |
| Somerset | Zone One (High) | 2.3 | Radon is a major problem in Somerset County |
| Waldo | Zone Two (Mid) | 3.4 | Radon is a problem in Waldo County |
| Washington | Zone Two (Mid) | 5.4 | Radon is a major problem in Washington County |
| York | Zone One (High) | 5.0 | Radon is a major problem in York County |
Is Radon a Problem in Maryland?
| County Name | EPA Zone Designation (1=High, 2=Mid, 3=Low) | Average Radon Level (pCi/L) | Is Radon a Problem in this County? |
|---|---|---|---|
| Allegany | Zone Two (Mid) | 4.7 | Radon is a major problem in Allegany County |
| Anne Arundel | Zone Two (Mid) | 3.4 | Radon is a problem in Anne Arundel County |
| Baltimore | Zone One (High) | 3.9 | Radon is a major problem in Baltimore County |
| Baltimore City | Zone Two (Mid) | 1.7 | Radon is a problem in Baltimore City County |
| Calvert | Zone One (High) | 5.3 | Radon is a major problem in Calvert County |
| Caroline | Zone Three (Low) | 1.1 | Radon is a minor problem in Caroline County |
| Carroll | Zone One (High) | 9.2 | Radon is an extreme problem in Carroll County |
| Cecil | Zone Two (Mid) | 3.3 | Radon is a problem in Cecil County |
| Charles | Zone Two (Mid) | 2.3 | Radon is a problem in Charles County |
| Dorchester | Zone Two (Mid) | 1.1 | Radon is a problem in Dorchester County |
| Frederick | Zone One (High) | 11.6 | Radon is an extreme problem in Frederick County |
| Garrett | Zone Two (Mid) | 5.5 | Radon is a major problem in Garrett County |
| Harford | Zone One (High) | 4.4 | Radon is a major problem in Harford County |
| Howard | Zone One (High) | 5.6 | Radon is a major problem in Howard County |
| Kent | Zone Three (Low) | 3.7 | Radon is a problem in Kent County |
| Montgomery | Zone One (High) | 4.6 | Radon is a major problem in Montgomery County |
| Prince George’s | Zone Two (Mid) | 2.8 | Radon is a problem in Prince George’s County |
| Queen Anne’s | Zone Three (Low) | 1.8 | Radon is a minor problem in Queen Anne’s County |
| Saint Mary’s (St. Mary’s) | Zone Two (Mid) | 2.1 | Radon is a problem in Saint Mary’s County |
| Somerset | Zone Three (Low) | 1.5 | Radon is a minor problem in Somerset County |
| Talbot | Zone Three (Low) | 1.0 | Radon is a minor problem in Talbot County |
| Washington | Zone One (High) | 9.0 | Radon is an extreme problem in Washington County |
| Wicomico | Zone Three (Low) | 0.8 | Radon is a minor problem in Wicomico County |
| Worcester | Zone Three (Low) | 0.7 | Radon is a minor problem in Worcester County |
Is Radon a Problem in Massachusetts?
| County Name | EPA Zone Designation (1=High, 2=Mid, 3=Low) | Average Radon Level (pCi/L) | Is Radon a Problem in this County? |
|---|---|---|---|
| Barnstable | Zone Two (Mid) | 2.9 | Radon is a problem in Barnstable County |
| Berkshire | Zone Two (Mid) | 3.5 | Radon is a problem in Berkshire County |
| Bristol | Zone Two (Mid) | 3.4 | Radon is a problem in Bristol County |
| Dukes | Zone Two (Mid) | 2.4 | Radon is a problem in Dukes County |
| Essex | Zone One (High) | 4.6 | Radon is a major problem in Essex County |
| Franklin | Zone Two (Mid) | 3.5 | Radon is a problem in Franklin County |
| Hampden | Zone Two (Mid) | 2.3 | Radon is a problem in Hampden County |
| Hampshire | Zone Two (Mid) | 2.8 | Radon is a problem in Hampshire County |
| Middlesex | Zone One (High) | 4.3 | Radon is a major problem in Middlesex County |
| Nantucket | Zone Two (Mid) | 0.6 | Radon is a problem in Nantucket County |
| Norfolk | Zone Two (Mid) | 3.8 | Radon is a problem in Norfolk County |
| Plymouth | Zone Two (Mid) | 2.8 | Radon is a problem in Plymouth County |
| Suffolk | Zone Three (Low) | 2.4 | Radon is a problem in Suffolk County |
| Worcester | Zone One (High) | 4.8 | Radon is a major problem in Worcester County |
Is Radon a Problem in Michigan?
| County Name | EPA Zone Designation (1=High, 2=Mid, 3=Low) | Average Radon Level (pCi/L) | Is Radon a Problem in this County? |
|---|---|---|---|
| Alcona | Zone Two (Mid) | 2.7 | Radon is a problem in Alcona County |
| Alger | Zone Two (Mid) | 3.3 | Radon is a problem in Alger County |
| Allegan | Zone Three (Low) | 3.1 | Radon is a problem in Allegan County |
| Alpena | Zone Two (Mid) | 1.9 | Radon is a problem in Alpena County |
| Antrim | Zone Two (Mid) | 1.6 | Radon is a problem in Antrim County |
| Arenac | Zone Three (Low) | 1.2 | Radon is a minor problem in Arenac County |
| Baraga | Zone Three (Low) | 1.8 | Radon is a minor problem in Baraga County |
| Barry | Zone Two (Mid) | 3.2 | Radon is a problem in Barry County |
| Bay | Zone Three (Low) | 1.6 | Radon is a minor problem in Bay County |
| Benzie | Zone Three (Low) | 1.6 | Radon is a minor problem in Benzie County |
| Berrien | Zone Three (Low) | 3.5 | Radon is a problem in Berrien County |
| Branch | Zone One (High) | 6.1 | Radon is a major problem in Branch County |
| Calhoun | Zone One (High) | 3.7 | Radon is a major problem in Calhoun County |
| Cass | Zone One (High) | 3.2 | Radon is a major problem in Cass County |
| Charlevoix | Zone Two (Mid) | 1.9 | Radon is a problem in Charlevoix County |
| Cheboygan | Zone Three (Low) | 1.4 | Radon is a minor problem in Cheboygan County |
| Chippewa | Zone Three (Low) | 1.9 | Radon is a minor problem in Chippewa County |
| Clare | Zone Three (Low) | 2.4 | Radon is a problem in Clare County |
| Clinton | Zone Two (Mid) | 4.2 | Radon is a major problem in Clinton County |
| Crawford | Zone Three (Low) | 1.7 | Radon is a minor problem in Crawford County |
| Delta | Zone Three (Low) | 2.4 | Radon is a problem in Delta County |
| Dickinson | Zone Two (Mid) | 4.3 | Radon is a major problem in Dickinson County |
| Eaton | Zone Two (Mid) | 3.9 | Radon is a problem in Eaton County |
| Emmet | Zone Two (Mid) | 2.2 | Radon is a problem in Emmet County |
| Genesee | Zone Two (Mid) | 2.9 | Radon is a problem in Genesee County |
| Gladwin | Zone Three (Low) | 2.1 | Radon is a problem in Gladwin County |
| Gogebic | Zone Two (Mid) | 2.1 | Radon is a problem in Gogebic County |
| Grand Traverse | Zone Three (Low) | 2.1 | Radon is a problem in Grand Traverse County |
| Gratiot | Zone Three (Low) | 2.2 | Radon is a problem in Gratiot County |
| Hillsdale | Zone One (High) | 6.9 | Radon is a major problem in Hillsdale County |
| Houghton | Zone Two (Mid) | 2.2 | Radon is a problem in Houghton County |
| Huron | Zone Three (Low) | 3.0 | Radon is a problem in Huron County |
| Ingham | Zone Two (Mid) | 2.6 | Radon is a problem in Ingham County |
| Ionia | Zone Two (Mid) | 4.0 | Radon is a major problem in Ionia County |
| Iosco | Zone Three (Low) | 1.3 | Radon is a minor problem in Iosco County |
| Iron | Zone Two (Mid) | 4.9 | Radon is a major problem in Iron County |
| Isabella | Zone Three (Low) | 2.0 | Radon is a problem in Isabella County |
| Jackson | Zone One (High) | 5.0 | Radon is a major problem in Jackson County |
| Kalamazoo | Zone One (High) | 3.3 | Radon is a major problem in Kalamazoo County |
| Kalkaska | Zone Three (Low) | 1.6 | Radon is a minor problem in Kalkaska County |
| Kent | Zone Two (Mid) | 2.5 | Radon is a problem in Kent County |
| Keweenaw | Zone Two (Mid) | 1.7 | Radon is a problem in Keweenaw County |
| Lake | Zone Three (Low) | 1.6 | Radon is a minor problem in Lake County |
| Lapeer | Zone Two (Mid) | 3.3 | Radon is a problem in Lapeer County |
| Leelanau | Zone Two (Mid) | 1.5 | Radon is a problem in Leelanau County |
| Lenawee | Zone One (High) | 6.5 | Radon is a major problem in Lenawee County |
| Livingston | Zone Two (Mid) | 4.1 | Radon is a major problem in Livingston County |
| Luce | Zone Three (Low) | 1.3 | Radon is a minor problem in Luce County |
| Mackinac | Zone Three (Low) | 3.0 | Radon is a problem in Mackinac County |
| Macomb | Zone Three (Low) | 2.1 | Radon is a problem in Macomb County |
| Manistee | Zone Three (Low) | 2.0 | Radon is a problem in Manistee County |
| Marquette | Zone Two (Mid) | 5.4 | Radon is a major problem in Marquette County |
| Mason | Zone Three (Low) | 1.4 | Radon is a minor problem in Mason County |
| Mecosta | Zone Three (Low) | 2.7 | Radon is a problem in Mecosta County |
| Menominee | Zone Two (Mid) | 2.1 | Radon is a problem in Menominee County |
| Midland | Zone Three (Low) | 1.3 | Radon is a minor problem in Midland County |
| Missaukee | Zone Three (Low) | 1.9 | Radon is a minor problem in Missaukee County |
| Monroe | Zone Two (Mid) | 3.5 | Radon is a problem in Monroe County |
| Montcalm | Zone Two (Mid) | 2.4 | Radon is a problem in Montcalm County |
| Montmorency | Zone Two (Mid) | 2.4 | Radon is a problem in Montmorency County |
| Muskegon | Zone Three (Low) | 1.3 | Radon is a minor problem in Muskegon County |
| Newaygo | Zone Three (Low) | 1.7 | Radon is a minor problem in Newaygo County |
| Oakland | Zone Two (Mid) | 3.4 | Radon is a problem in Oakland County |
| Oceana | Zone Three (Low) | 1.3 | Radon is a minor problem in Oceana County |
| Ogemaw | Zone Three (Low) | 2.4 | Radon is a problem in Ogemaw County |
| Ontonagon | Zone Three (Low) | 1.4 | Radon is a minor problem in Ontonagon County |
| Osceola | Zone Three (Low) | 1.9 | Radon is a minor problem in Osceola County |
| Oscoda | Zone Three (Low) | 2.5 | Radon is a problem in Oscoda County |
| Otsego | Zone Two (Mid) | 4.1 | Radon is a major problem in Otsego County |
| Ottawa | Zone Three (Low) | 3.4 | Radon is a problem in Ottawa County |
| Presque Isle | Zone Two (Mid) | 4.5 | Radon is a major problem in Presque Isle County |
| Roscommon | Zone Three (Low) | 1.8 | Radon is a minor problem in Roscommon County |
| Saginaw | Zone Three (Low) | 2.2 | Radon is a problem in Saginaw County |
| Saint Clair (St. Clair) | Zone Three (Low) | 2.2 | Radon is a problem in Saint Clair County |
| Saint Joseph (St. Joseph) | Zone One (High) | 3.6 | Radon is a major problem in Saint Joseph County |
| Sanilac | Zone Two (Mid) | 2.2 | Radon is a problem in Sanilac County |
| Schoolcraft | Zone Three (Low) | 1.6 | Radon is a minor problem in Schoolcraft County |
| Shiawassee | Zone Two (Mid) | 3.5 | Radon is a problem in Shiawassee County |
| Tuscola | Zone Three (Low) | 3.7 | Radon is a problem in Tuscola County |
| Van Buren | Zone Three (Low) | 1.9 | Radon is a minor problem in Van Buren County |
| Washtenaw | Zone One (High) | 4.7 | Radon is a major problem in Washtenaw County |
| Wayne | Zone Three (Low) | 2.5 | Radon is a problem in Wayne County |
| Wexford | Zone Three (Low) | 2.0 | Radon is a problem in Wexford County |
Is Radon a Problem in Minnesota?
| County Name | EPA Zone Designation (1=High, 2=Mid, 3=Low) | Average Radon Level (pCi/L | Is Radon a Problem in this County? |
|---|---|---|---|
| Aitkin | Zone Two (Mid) | 3.3 | Radon is a problem in Aitkin County |
| Anoka | Zone Two (Mid) | 2.4 | Radon is a problem in Anoka County |
| Becker | Zone One (High) | 3.8 | Radon is a major problem in Becker County |
| Beltrami | Zone Two (Mid) | 3.9 | Radon is a problem in Beltrami County |
| Benton | Zone Two (Mid) | 3.8 | Radon is a problem in Benton County |
| Big Stone | Zone One (High) | 5.6 | Radon is a major problem in Big Stone County |
| Blue Earth | Zone One (High) | 6.1 | Radon is a major problem in Blue Earth County |
| Brown | Zone One (High) | 7.3 | Radon is a major problem in Brown County |
| Carlton | Zone Two (Mid) | 4.1 | Radon is a major problem in Carlton County |
| Carver | Zone One (High) | 3.9 | Radon is a major problem in Carver County |
| Cass | Zone Two (Mid) | 2.9 | Radon is a problem in Cass County |
| Chippewa | Zone One (High) | 6.1 | Radon is a major problem in Chippewa County |
| Chisago | Zone Two (Mid) | 3.3 | Radon is a problem in Chisago County |
| Clay | Zone One (High) | 6.6 | Radon is a major problem in Clay County |
| Clearwater | Zone Two (Mid) | 5.0 | Radon is a major problem in Clearwater County |
| Cook | Zone Two (Mid) | 5.1 | Radon is a major problem in Cook County |
| Cottonwood | Zone One (High) | 7.1 | Radon is a major problem in Cottonwood County |
| Crow Wing | Zone Two (Mid) | 3.3 | Radon is a problem in Crow Wing County |
| Dakota | Zone One (High) | 3.7 | Radon is a major problem in Dakota County |
| Dodge | Zone One (High) | 8.9 | Radon is an extreme problem in Dodge County |
| Douglas | Zone One (High) | 5.8 | Radon is a major problem in Douglas County |
| Faribault | Zone One (High) | 6.6 | Radon is a major problem in Faribault County |
| Fillmore | Zone One (High) | 7.5 | Radon is a major problem in Fillmore County |
| Freeborn | Zone One (High) | 8.1 | Radon is an extreme problem in Freeborn County |
| Goodhue | Zone One (High) | 6.8 | Radon is a major problem in Goodhue County |
| Grant | Zone One (High) | 6.3 | Radon is a major problem in Grant County |
| Hennepin | Zone One (High) | 3.6 | Radon is a major problem in Hennepin County |
| Houston | Zone One (High) | 5.3 | Radon is a major problem in Houston County |
| Hubbard | Zone One (High) | 3.8 | Radon is a major problem in Hubbard County |
| Isanti | Zone Two (Mid) | 2.4 | Radon is a problem in Isanti County |
| Itasca | Zone Two (Mid) | 3.8 | Radon is a problem in Itasca County |
| Jackson | Zone One (High) | 7.2 | Radon is a major problem in Jackson County |
| Kanabec | Zone One (High) | 4.2 | Radon is a major problem in Kanabec County |
| Kandiyohi | Zone One (High) | 6.3 | Radon is a major problem in Kandiyohi County |
| Kittson | Zone One (High) | 5.0 | Radon is a major problem in Kittson County |
| Koochiching | Zone Two (Mid) | 2.8 | Radon is a problem in Koochiching County |
| Lac Qui Parle | Zone One (High) | 6.6 | Radon is a major problem in Lac Qui Parle County |
| Lake | Zone Two (Mid) | 2.6 | Radon is a problem in Lake County |
| Lake Of The Wood | Zone Two (Mid) | 4.9 | Radon is a major problem in Lake Of The Wood County |
| Le Sueur | Zone One (High) | 7.0 | Radon is a major problem in Le Sueur County |
| Lincoln | Zone One (High) | 8.3 | Radon is an extreme problem in Lincoln County |
| Lyon | Zone One (High) | 6.8 | Radon is a major problem in Lyon County |
| Mahnomen | Zone One (High) | 4.0 | Radon is a major problem in Mahnomen County |
| Marshall | Zone One (High) | 7.2 | Radon is a major problem in Marshall County |
| Martin | Zone One (High) | 7.5 | Radon is a major problem in Martin County |
| McLeod | Zone One (High) | 5.3 | Radon is a major problem in McLeod County |
| Meeker | Zone One (High) | 4.9 | Radon is a major problem in Meeker County |
| Mille Lacs | Zone Two (Mid) | 2.7 | Radon is a problem in Mille Lacs County |
| Morrison | Zone Two (Mid) | 3.8 | Radon is a problem in Morrison County |
| Mower | Zone One (High) | 5.4 | Radon is a major problem in Mower County |
| Murray | Zone One (High) | 6.7 | Radon is a major problem in Murray County |
| Nicollet | Zone One (High) | 6.2 | Radon is a major problem in Nicollet County |
| Nobles | Zone One (High) | 6.9 | Radon is a major problem in Nobles County |
| Norman | Zone One (High) | 5.9 | Radon is a major problem in Norman County |
| Olmsted | Zone One (High) | 6.1 | Radon is a major problem in Olmsted County |
| Otter Tail | Zone One (High) | 5.7 | Radon is a major problem in Otter Tail County |
| Pennington | Zone One (High) | 4.9 | Radon is a major problem in Pennington County |
| Pine | Zone Two (Mid) | 3.0 | Radon is a problem in Pine County |
| Pipestone | Zone One (High) | 7.7 | Radon is a major problem in Pipestone County |
| Polk | Zone One (High) | 6.9 | Radon is a major problem in Polk County |
| Pope | Zone One (High) | 5.0 | Radon is a major problem in Pope County |
| Ramsey | Zone One (High) | 3.1 | Radon is a major problem in Ramsey County |
| Red Lake | Zone One (High) | 4.8 | Radon is a major problem in Red Lake County |
| Redwood | Zone One (High) | 7.3 | Radon is a major problem in Redwood County |
| Renville | Zone One (High) | 7.6 | Radon is a major problem in Renville County |
| Rice | Zone One (High) | 5.7 | Radon is a major problem in Rice County |
| Rock | Zone One (High) | 8.6 | Radon is an extreme problem in Rock County |
| Roseau | Zone One (High) | 2.4 | Radon is a major problem in Roseau County |
| Saint Louis (St. Louis) | Zone Two (Mid) | 3.1 | Radon is a problem in Saint Louis County |
| Scott | Zone One (High) | 4.8 | Radon is a major problem in Scott County |
| Sherburne | Zone One (High) | 3.8 | Radon is a major problem in Sherburne County |
| Sibley | Zone One (High) | 7.7 | Radon is a major problem in Sibley County |
| Stearns | Zone One (High) | 4.8 | Radon is a major problem in Stearns County |
| Steele | Zone One (High) | 6.1 | Radon is a major problem in Steele County |
| Stevens | Zone One (High) | 6.6 | Radon is a major problem in Stevens County |
| Swift | Zone One (High) | 5.2 | Radon is a major problem in Swift County |
| Todd | Zone One (High) | 3.7 | Radon is a major problem in Todd County |
| Traverse | Zone One (High) | 5.3 | Radon is a major problem in Traverse County |
| Wabasha | Zone One (High) | 6.9 | Radon is a major problem in Wabasha County |
| Wadena | Zone One (High) | 3.0 | Radon is a major problem in Wadena County |
| Waseca | Zone One (High) | 7.5 | Radon is a major problem in Waseca County |
| Washington | Zone One (High) | 3.5 | Radon is a major problem in Washington County |
| Watonwan | Zone One (High) | 6.6 | Radon is a major problem in Watonwan County |
| Wilkin | Zone One (High) | 5.3 | Radon is a major problem in Wilkin County |
| Winona | Zone One (High) | 5.6 | Radon is a major problem in Winona County |
| Wright | Zone One (High) | 4.7 | Radon is a major problem in Wright County |
| Yellow Medicine | Zone One (High) | 6.6 | Radon is a major problem in Yellow Medicine County |
Is Radon a Problem in Mississippi?
| County Name | EPA Zone Designation (1=High, 2=Mid, 3=Low) | Average Radon Level (pCi/L) | Is Radon a Problem in this County? |
|---|---|---|---|
| Adams | Zone Three (Low) | 4.4 | Radon is a major problem in Adams County |
| Alcorn | Zone Two (Mid) | 1.7 | Radon is a problem in Alcorn County |
| Amite | Zone Three (Low) | 1.4 | Radon is a minor problem in Amite County |
| Attala | Zone Three (Low) | 0.6 | Radon is a minor problem in Attala County |
| Benton | Zone Three (Low) | 0.7 | Radon is a minor problem in Benton County |
| Bolivar | Zone Three (Low) | 2.2 | Radon is a problem in Bolivar County |
| Calhoun | Zone Three (Low) | 0.5 | Radon is a minor problem in Calhoun County |
| Carroll | Zone Three (Low) | 2.6 | Radon is a problem in Carroll County |
| Chickasaw | Zone Two (Mid) | No Data | Radon is a problem in Chickasaw County |
| Choctaw | Zone Three (Low) | No Data | Radon is a minor problem in Choctaw County |
| Claiborne | Zone Three (Low) | No Data | Radon is a minor problem in Claiborne County |
| Clarke | Zone Three (Low) | 0.4 | Radon is a minor problem in Clarke County |
| Clay | Zone Two (Mid) | 1.7 | Radon is a problem in Clay County |
| Coahoma | Zone Three (Low) | 3.3 | Radon is a problem in Coahoma County |
| Copiah | Zone Three (Low) | 0.4 | Radon is a minor problem in Copiah County |
| Covington | Zone Three (Low) | 1.1 | Radon is a minor problem in Covington County |
| De Soto | Zone Three (Low) | 1.1 | Radon is a minor problem in De Soto County |
| Forrest | Zone Three (Low) | 0.8 | Radon is a minor problem in Forrest County |
| Franklin | Zone Three (Low) | No Data | Radon is a minor problem in Franklin County |
| George | Zone Three (Low) | 2.3 | Radon is a problem in George County |
| Greene | Zone Three (Low) | No Data | Radon is a minor problem in Greene County |
| Grenada | Zone Three (Low) | 2.4 | Radon is a problem in Grenada County |
| Hancock | Zone Three (Low) | 1.8 | Radon is a minor problem in Hancock County |
| Harrison | Zone Three (Low) | 0.6 | Radon is a minor problem in Harrison County |
| Hinds | Zone Three (Low) | 0.9 | Radon is a minor problem in Hinds County |
| Holmes | Zone Three (Low) | 2.0 | Radon is a problem in Holmes County |
| Humphreys | Zone Three (Low) | No Data | Radon is a minor problem in Humphreys County |
| Issaquena | Zone Three (Low) | No Data | Radon is a minor problem in Issaquena County |
| Itawamba | Zone Three (Low) | 2.2 | Radon is a problem in Itawamba County |
| Jackson | Zone Three (Low) | 0.4 | Radon is a minor problem in Jackson County |
| Jasper | Zone Three (Low) | 2.2 | Radon is a problem in Jasper County |
| Jefferson | Zone Three (Low) | No Data | Radon is a minor problem in Jefferson County |
| Jefferson Davis | Zone Three (Low) | 1.6 | Radon is a minor problem in Jefferson Davis County |
| Jones | Zone Three (Low) | 0.3 | Radon is a minor problem in Jones County |
| Kemper | Zone Three (Low) | 0.3 | Radon is a minor problem in Kemper County |
| Lafayette | Zone Three (Low) | 1.0 | Radon is a minor problem in Lafayette County |
| Lamar | Zone Three (Low) | 0.6 | Radon is a minor problem in Lamar County |
| Lauderdale | Zone Three (Low) | 1.2 | Radon is a minor problem in Lauderdale County |
| Lawrence | Zone Three (Low) | 0.4 | Radon is a minor problem in Lawrence County |
| Leake | Zone Three (Low) | 0.5 | Radon is a minor problem in Leake County |
| Lee | Zone Two (Mid) | 1.2 | Radon is a problem in Lee County |
| Leflore | Zone Three (Low) | 0.9 | Radon is a minor problem in Leflore County |
| Lincoln | Zone Three (Low) | 0.6 | Radon is a minor problem in Lincoln County |
| Lowndes | Zone Two (Mid) | 0.6 | Radon is a minor problem in Lowndes County |
| Madison | Zone Three (Low) | 0.6 | Radon is a minor problem in Madison County |
| Marion | Zone Three (Low) | 1.4 | Radon is a minor problem in Marion County |
| Marshall | Zone Three (Low) | 1.2 | Radon is a minor problem in Marshall County |
| Monroe | Zone Three (Low) | 1.3 | Radon is a minor problem in Monroe County |
| Montgomery | Zone Three (Low) | 1.4 | Radon is a minor problem in Montgomery County |
| Neshoba | Zone Three (Low) | 1.4 | Radon is a minor problem in Neshoba County |
| Newton | Zone Three (Low) | No Data | Radon is a minor problem in Newton County |
| Noxubee | Zone Two (Mid) | 0.6 | Radon is a problem in Noxubee County |
| Oktibbeha | Zone Three (Low) | 2.2 | Radon is a problem in Oktibbeha County |
| Panola | Zone Three (Low) | 2.1 | Radon is a problem in Panola County |
| Pearl River | Zone Three (Low) | 0.4 | Radon is a minor problem in Pearl River County |
| Perry | Zone Three (Low) | 1.1 | Radon is a minor problem in Perry County |
| Pike | Zone Three (Low) | 0.2 | Radon is a minor problem in Pike County |
| Pontotoc | Zone Two (Mid) | 1.2 | Radon is a problem in Pontotoc County |
| Prentiss | Zone Three (Low) | 0.7 | Radon is a minor problem in Prentiss County |
| Quitman | Zone Three (Low) | 2.2 | Radon is a problem in Quitman County |
| Rankin | Zone Three (Low) | 1.8 | Radon is a minor problem in Rankin County |
| Scott | Zone Three (Low) | 0.7 | Radon is a minor problem in Scott County |
| Sharkey | Zone Three (Low) | No Data | Radon is a minor problem in Sharkey County |
| Simpson | Zone Three (Low) | 0.8 | Radon is a minor problem in Simpson County |
| Smith | Zone Three (Low) | 1.1 | Radon is a minor problem in Smith County |
| Stone | Zone Three (Low) | 0.9 | Radon is a minor problem in Stone County |
| Sunflower | Zone Three (Low) | 2.6 | Radon is a problem in Sunflower County |
| Tallahatchie | Zone Three (Low) | 0.8 | Radon is a minor problem in Tallahatchie County |
| Tate | Zone Three (Low) | 0.5 | Radon is a minor problem in Tate County |
| Tippah | Zone Three (Low) | 0.8 | Radon is a minor problem in Tippah County |
| Tishomingo | Zone Three (Low) | 1.7 | Radon is a minor problem in Tishomingo County |
| Tunica | Zone Three (Low) | No Data | Radon is a minor problem in Tunica County |
| Union | Zone Two (Mid) | 23.5 | Radon is an extreme problem in Union County |
| Walthall | Zone Three (Low) | 0.1 | Radon is a minor problem in Walthall County |
| Warren | Zone Three (Low) | 1.5 | Radon is a minor problem in Warren County |
| Washington | Zone Three (Low) | 1.2 | Radon is a minor problem in Washington County |
| Wayne | Zone Three (Low) | 1.1 | Radon is a minor problem in Wayne County |
| Webster | Zone Three (Low) | No Data | Radon is a minor problem in Webster County |
| Wilkinson | Zone Three (Low) | 1.2 | Radon is a minor problem in Wilkinson County |
| Winston | Zone Three (Low) | 2.1 | Radon is a problem in Winston County |
| Yalobusha | Zone Three (Low) | No Data | Radon is a minor problem in Yalobusha County |
| Yazoo | Zone Three (Low) | 1.7 | Radon is a minor problem in Yazoo County |
Is Radon a Problem in Missouri?
| County Name | EPA Zone Designation (1=High, 2=Mid, 3=Low) | Average Radon Level (pCi/L) | Is Radon a Problem in this County? |
|---|---|---|---|
| Adair | Zone Two (Mid) | 2.0 | Radon is a problem in Adair County |
| Andrew | Zone One (High) | 7.1 | Radon is a major problem in Andrew County |
| Atchison | Zone One (High) | 7.0 | Radon is a major problem in Atchison County |
| Audrain | Zone Two (Mid) | 5.2 | Radon is a major problem in Audrain County |
| Barry | Zone Two (Mid) | 4.7 | Radon is a major problem in Barry County |
| Barton | Zone Two (Mid) | 2.1 | Radon is a problem in Barton County |
| Bates | Zone Two (Mid) | 2.4 | Radon is a problem in Bates County |
| Benton | Zone Two (Mid) | 2.4 | Radon is a problem in Benton County |
| Bollinger | Zone Two (Mid) | 2.5 | Radon is a problem in Bollinger County |
| Boone | Zone Two (Mid) | 4.0 | Radon is a major problem in Boone County |
| Buchanan | Zone One (High) | 5.6 | Radon is a major problem in Buchanan County |
| Butler | Zone Three (Low) | 2.5 | Radon is a problem in Butler County |
| Caldwell | Zone Two (Mid) | 4.5 | Radon is a major problem in Caldwell County |
| Callaway | Zone Two (Mid) | 4.6 | Radon is a major problem in Callaway County |
| Camden | Zone Two (Mid) | 2.6 | Radon is a problem in Camden County |
| Cape Girardeau | Zone Two (Mid) | 3.3 | Radon is a problem in Cape Girardeau County |
| Carroll | Zone Two (Mid) | 3.4 | Radon is a problem in Carroll County |
| Carter | Zone Two (Mid) | 4.2 | Radon is a major problem in Carter County |
| Cass | Zone One (High) | 5.6 | Radon is a major problem in Cass County |
| Cedar | Zone Two (Mid) | 1.4 | Radon is a problem in Cedar County |
| Chariton | Zone Two (Mid) | 2.5 | Radon is a problem in Chariton County |
| Christian | Zone Two (Mid) | 4.3 | Radon is a major problem in Christian County |
| Clark | Zone Two (Mid) | 4.5 | Radon is a major problem in Clark County |
| Clay | Zone One (High) | 4.0 | Radon is a major problem in Clay County |
| Clinton | Zone One (High) | 4.3 | Radon is a major problem in Clinton County |
| Cole | Zone Two (Mid) | 3.0 | Radon is a problem in Cole County |
| Cooper | Zone Two (Mid) | 4.3 | Radon is a major problem in Cooper County |
| Crawford | Zone Two (Mid) | 2.8 | Radon is a problem in Crawford County |
| Dade | Zone Two (Mid) | 2.9 | Radon is a problem in Dade County |
| Dallas | Zone Two (Mid) | 1.6 | Radon is a problem in Dallas County |
| Daviess | Zone Two (Mid) | 2.3 | Radon is a problem in Daviess County |
| DeKalb | Zone Two (Mid) | 4.4 | Radon is a major problem in DeKalb County |
| Dent | Zone Two (Mid) | 4.0 | Radon is a major problem in Dent County |
| Douglas | Zone Two (Mid) | 5.5 | Radon is a major problem in Douglas County |
| Dunklin | Zone Three (Low) | 1.2 | Radon is a minor problem in Dunklin County |
| Franklin | Zone Two (Mid) | 3.4 | Radon is a problem in Franklin County |
| Gasconade | Zone Two (Mid) | 2.8 | Radon is a problem in Gasconade County |
| Gentry | Zone Two (Mid) | 4.8 | Radon is a major problem in Gentry County |
| Greene | Zone Two (Mid) | 4.0 | Radon is a major problem in Greene County |
| Grundy | Zone Two (Mid) | 5.5 | Radon is a major problem in Grundy County |
| Harrison | Zone Two (Mid) | 3.6 | Radon is a problem in Harrison County |
| Henry | Zone Two (Mid) | 3.6 | Radon is a problem in Henry County |
| Hickory | Zone Two (Mid) | 2.2 | Radon is a problem in Hickory County |
| Holt | Zone One (High) | 5.1 | Radon is a major problem in Holt County |
| Howard | Zone Two (Mid) | 5.0 | Radon is a major problem in Howard County |
| Howell | Zone Two (Mid) | 6.4 | Radon is a major problem in Howell County |
| Iron | Zone One (High) | 3.9 | Radon is a major problem in Iron County |
| Jackson | Zone One (High) | 4.9 | Radon is a major problem in Jackson County |
| Jasper | Zone Two (Mid) | 3.2 | Radon is a problem in Jasper County |
| Jefferson | Zone Two (Mid) | 5.3 | Radon is a major problem in Jefferson County |
| Johnson | Zone Two (Mid) | 3.2 | Radon is a problem in Johnson County |
| Knox | Zone Two (Mid) | 1.7 | Radon is a problem in Knox County |
| Laclede | Zone Two (Mid) | 3.1 | Radon is a problem in Laclede County |
| Lafayette | Zone Two (Mid) | 5.2 | Radon is a major problem in Lafayette County |
| Lawrence | Zone Two (Mid) | 5.2 | Radon is a major problem in Lawrence County |
| Lewis | Zone Two (Mid) | 1.7 | Radon is a problem in Lewis County |
| Lincoln | Zone Two (Mid) | 4.5 | Radon is a major problem in Lincoln County |
| Linn | Zone Two (Mid) | 2.6 | Radon is a problem in Linn County |
| Livingston | Zone Two (Mid) | 3.6 | Radon is a problem in Livingston County |
| Macon | Zone Two (Mid) | 2.5 | Radon is a problem in Macon County |
| Madison | Zone Two (Mid) | 4.3 | Radon is a major problem in Madison County |
| Maries | Zone Two (Mid) | 2.0 | Radon is a problem in Maries County |
| Marion | Zone Two (Mid) | 5.6 | Radon is a major problem in Marion County |
| McDonald | Zone Two (Mid) | 5.4 | Radon is a major problem in McDonald County |
| Mercer | Zone Two (Mid) | 3.2 | Radon is a problem in Mercer County |
| Miller | Zone Two (Mid) | 3.0 | Radon is a problem in Miller County |
| Mississippi | Zone Three (Low) | 0.9 | Radon is a minor problem in Mississippi County |
| Moniteau | Zone Two (Mid) | 3.0 | Radon is a problem in Moniteau County |
| Monroe | Zone Two (Mid) | 2.6 | Radon is a problem in Monroe County |
| Montgomery | Zone Two (Mid) | 5.1 | Radon is a major problem in Montgomery County |
| Morgan | Zone Two (Mid) | 2.8 | Radon is a problem in Morgan County |
| New Madrid | Zone Three (Low) | 1.3 | Radon is a minor problem in New Madrid County |
| Newton | Zone Two (Mid) | 2.5 | Radon is a problem in Newton County |
| Nodaway | Zone One (High) | 6.3 | Radon is a major problem in Nodaway County |
| Oregon | Zone Two (Mid) | 5.5 | Radon is a major problem in Oregon County |
| Osage | Zone Two (Mid) | 2.0 | Radon is a problem in Osage County |
| Ozark | Zone Two (Mid) | 4.9 | Radon is a major problem in Ozark County |
| Pemiscot | Zone Three (Low) | 1.0 | Radon is a minor problem in Pemiscot County |
| Perry | Zone Two (Mid) | 4.1 | Radon is a major problem in Perry County |
| Pettis | Zone Two (Mid) | 4.8 | Radon is a major problem in Pettis County |
| Phelps | Zone Two (Mid) | 2.0 | Radon is a problem in Phelps County |
| Pike | Zone Two (Mid) | 3.2 | Radon is a problem in Pike County |
| Platte | Zone One (High) | 4.4 | Radon is a major problem in Platte County |
| Polk | Zone Two (Mid) | 2.3 | Radon is a problem in Polk County |
| Pulaski | Zone Two (Mid) | 1.9 | Radon is a problem in Pulaski County |
| Putnam | Zone Two (Mid) | 1.8 | Radon is a problem in Putnam County |
| Ralls | Zone Two (Mid) | 8.8 | Radon is an extreme problem in Ralls County |
| Randolph | Zone Two (Mid) | 2.2 | Radon is a problem in Randolph County |
| Ray | Zone Two (Mid) | 5.1 | Radon is a major problem in Ray County |
| Reynolds | Zone Two (Mid) | 2.7 | Radon is a problem in Reynolds County |
| Ripley | Zone Two (Mid) | 4.3 | Radon is a major problem in Ripley County |
| Saint Charles (St. Charles) | Zone Two (Mid) | 3.6 | Radon is a problem in Saint Charles County |
| Saint Clair (St. Clair) | Zone Two (Mid) | 1.2 | Radon is a problem in Saint Clair County |
| Sainte Genevieve (Ste. Genevieve) | Zone Two (Mid) | 5.7 | Radon is a major problem in Sainte Genevieve County |
| Saint Francois (St. Francois) | Zone Two (Mid) | 4.6 | Radon is a major problem in Saint Francois County |
| Saint Louis (St. Louis) | Zone Two (Mid) | 3.5 | Radon is a problem in Saint Louis County |
| Saint Louis City (St. Louis City) | Zone Two (Mid) | 2.4 | Radon is a problem in Saint Louis City County |
| Saline | Zone Two (Mid) | 4.8 | Radon is a major problem in Saline County |
| Schuyler | Zone Two (Mid) | 1.9 | Radon is a problem in Schuyler County |
| Scotland | Zone Two (Mid) | 3.1 | Radon is a problem in Scotland County |
| Scott | Zone Three (Low) | 1.9 | Radon is a minor problem in Scott County |
| Shannon | Zone Two (Mid) | 2.6 | Radon is a problem in Shannon County |
| Shelby | Zone Two (Mid) | 2.1 | Radon is a problem in Shelby County |
| Stoddard | Zone Three (Low) | 1.2 | Radon is a minor problem in Stoddard County |
| Stone | Zone Two (Mid) | 7.7 | Radon is a major problem in Stone County |
| Sullivan | Zone Two (Mid) | 3.2 | Radon is a problem in SullivanCounty |
| Taney | Zone Two (Mid) | 5.5 | Radon is a major problem in Taney County |
| Texas | Zone Two (Mid) | 1.7 | Radon is a problem in Texas County |
| Vernon | Zone Two (Mid) | 1.8 | Radon is a problem in Vernon County |
| Warren | Zone Two (Mid) | 4.2 | Radon is a major problem in WarrenCounty |
| Washington | Zone Two (Mid) | 3.6 | Radon is a problem in Washington County |
| Wayne | Zone Two (Mid) | 5.3 | Radon is a major problem in Wayne County |
| Webster | Zone Two (Mid) | 2.8 | Radon is a problem in Webster County |
| Worth | Zone Two (Mid) | 3.5 | Radon is a problem in Worth County |
| Wright | Zone Two (Mid) | 3.2 | Radon is a problem in Wright County |
Is Radon a Problem in Montana?
| County Name | EPA Zone Designation (1=High, 2=Mid, 3=Low) | Average Radon Level (pCi/L) | Is Radon a Problem in this County? |
|---|---|---|---|
| Beaverhead | Zone One (High) | 10.7 | Radon is an extreme problem in Beaverhead County |
| Big Horn | Zone One (High) | 5.8 | Radon is a major problem in Big Horn County |
| Blaine | Zone One (High) | 8.7 | Radon is an extreme problem in Blaine County |
| Broadwater | Zone One (High) | 4.2 | Radon is a major problem in Broadwater County |
| Carbon | Zone One (High) | 5.1 | Radon is a major problem in Carbon County |
| Carter | Zone One (High) | 3.5 | Radon is a major problem in Carter County |
| Cascade | Zone One (High) | 3.8 | Radon is a major problem in Cascade County |
| Chouteau | Zone One (High) | 4.9 | Radon is a major problem in Chouteau County |
| Custer | Zone One (High) | 3.9 | Radon is a major problem in Custer County |
| Daniels | Zone One (High) | 5.8 | Radon is a major problem in Daniels County |
| Dawson | Zone One (High) | 4.2 | Radon is a major problem in Dawson County |
| Deer Lodge | Zone One (High) | 4.8 | Radon is a major problem in Deer Lodge County |
| Fallon | Zone One (High) | 14.2 | Radon is an extreme problem in Fallon County |
| Fergus | Zone One (High) | 10.4 | Radon is an extreme problem in Fergus County |
| Flathead | Zone One (High) | 7.6 | Radon is a major problem in Flathead County |
| Gallatin | Zone One (High) | 5.5 | Radon is a major problem in Gallatin County |
| Garfield | Zone One (High) | No Data | Radon is a major problem in Garfield County |
| Glacier | Zone One (High) | 3.9 | Radon is a major problem in Glacier County |
| Golden Valley | Zone Two (Mid) | 4.1 | Radon is a major problem in Golden Valley County |
| Granite | Zone One (High) | 6.0 | Radon is a major problem in Granite County |
| Hill | Zone One (High) | 3.5 | Radon is a major problem in Hill County |
| Jefferson | Zone One (High) | 8.7 | Radon is an extreme problem in Jefferson County |
| Judith Basin | Zone One (High) | 7.4 | Radon is a major problem in Judith Basin County |
| Lake | Zone One (High) | 6.0 | Radon is a major problem in Lake County |
| Lewis And Clark | Zone One (High) | 12.8 | Radon is an extreme problem in Lewis And Clark County |
| Liberty | Zone One (High) | 3.2 | Radon is a major problem in Liberty County |
| Lincoln | Zone One (High) | 8.2 | Radon is an extreme problem in Lincoln County |
| Madison | Zone One (High) | 5.4 | Radon is a major problem in Madison County |
| McCone | Zone One (High) | 6.0 | Radon is a major problem in McCone County |
| Meagher | Zone One (High) | 2.8 | Radon is a major problem in Meagher County |
| Mineral | Zone One (High) | 8.2 | Radon is an extreme problem in Mineral County |
| Missoula | Zone One (High) | 6.3 | Radon is a major problem in Missoula County |
| Musselshell | Zone Two (Mid) | 4.1 | Radon is a major problem in Musselshell County |
| Park | Zone One (High) | 7.1 | Radon is a major problem in Park County |
| Petroleum | Zone Two (Mid) | 3.8 | Radon is a problem in Petroleum County |
| Phillips | Zone One (High) | 3.5 | Radon is a problem in Phillips County |
| Pondera | Zone One (High) | 4.9 | Radon is a major problem in Pondera County |
| Powder River | Zone One (High) | 4.9 | Radon is a major problem in Powder River County |
| Powell | Zone One (High) | 8.3 | Radon is an extreme problem in Powell County |
| Prairie | Zone One (High) | 4.0 | Radon is a major problem in Prairie County |
| Ravalli | Zone One (High) | 6.2 | Radon is a major problem in Ravalli County |
| Richland | Zone One (High) | 5.8 | Radon is a major problem in Richland County |
| Roosevelt | Zone One (High) | 4.8 | Radon is a major problem in Roosevelt County |
| Rosebud | Zone One (High) | 4.0 | Radon is a major problem in Rosebud County |
| Sanders | Zone One (High) | 11.9 | Radon is an extreme problem in Sanders County |
| Sheridan | Zone One (High) | 8.7 | Radon is an extreme problem in Sheridan County |
| Silver Bow | Zone One (High) | 9.3 | Radon is an extreme problem in Silver Bow County |
| Stillwater | Zone One (High) | 5.9 | Radon is a major problem in Stillwater County |
| Sweet Grass | Zone Two (Mid) | 11.0 | Radon is an extreme problem in Sweet Grass County |
| Teton | Zone One (High) | 5.9 | Radon is a major problem in Teton County |
| Toole | Zone One (High) | 3.5 | Radon is a problem in Toole County |
| Treasure | Zone Two (Mid) | No Data | Radon is a problem in Treasure County |
| Valley | Zone One (High) | 5.9 | Radon is a major problem in Valley County |
| Wheatland | Zone Two (Mid) | 5.8 | Radon is a major problem in Wheatland County |
| Wibaux | Zone One (High) | 10.4 | Radon is an extreme problem in Wibaux County |
| Yellowstone | Zone Two (Mid) | 3.5 | Radon is a problem in Yellowstone County |
Is Radon a Problem in Nebraska?
| County Name | EPA Zone Designation (1=High, 2=Mid, 3=Low) | Average Radon Level (pCi/L) | Is Radon a Problem in this County? |
|---|---|---|---|
| Adams | Zone One (High) | 6.0 | Radon is a major problem in Adams County |
| Antelope | Zone Two (Mid) | 7.4 | Radon is a major problem in Antelope County |
| Arthur | Zone Three (Low) | 1.3 | Radon is a minor problem in Arthur County |
| Banner | Zone Two (Mid) | 6.9 | Radon is a major problem in Banner County |
| Blaine | Zone Three (Low) | 0.9 | Radon is a minor problem in Blaine County |
| Boone | Zone One (High) | 7.3 | Radon is a major problem in Boone County |
| Box Butte | Zone Two (Mid) | 3.4 | Radon is a problem in Box Butte County |
| Boyd | Zone One (High) | 8.1 | Radon is an extreme problem in Boyd County |
| Brown | Zone Three (Low) | 3.2 | Radon is a problem in Brown County |
| Buffalo | Zone Two (Mid) | 4.7 | Radon is a major problem in Buffalo County |
| Burt | Zone One (High) | 9.9 | Radon is an extreme problem in Burt County |
| Butler | Zone One (High) | 8.5 | Radon is an extreme problem in Butler County |
| Cass | Zone One (High) | 8.4 | Radon is an extreme problem in Cass County |
| Cedar | Zone One (High) | 12.0 | Radon is an extreme problem in Cedar County |
| Chase | Zone Two (Mid) | 5.4 | Radon is a major problem in Chase County |
| Cherry | Zone Three (Low) | 2.2 | Radon is a problem in Cherry County |
| Cheyenne | Zone Two (Mid) | 4.6 | Radon is a major problem in Cheyenne County |
| Clay | Zone One (High) | 8.6 | Radon is an extreme problem in Clay County |
| Colfax | Zone One (High) | 7.7 | Radon is a major problem in Colfax County |
| Cuming | Zone One (High) | 7.2 | Radon is a major problem in Cuming County |
| Custer | Zone Two (Mid) | 4.8 | Radon is a major problem in Custer County |
| Dakota | Zone One (High) | 7.4 | Radon is a major problem in Dakota County |
| Dawes | Zone Two (Mid) | 6.0 | Radon is a major problem in Dawes County |
| Dawson | Zone Two (Mid) | 3.6 | Radon is a problem in Dawson County |
| Deuel | Zone Two (Mid) | 5.0 | Radon is a major problem in Deuel County |
| Dixon | Zone One (High) | 10.8 | Radon is an extreme problem in Dixon County |
| Dodge | Zone One (High) | 6.6 | Radon is a major problem in Dodge County |
| Douglas | Zone One (High) | 4.7 | Radon is a major problem in Douglas County |
| Dundy | Zone Two (Mid) | 4.2 | Radon is a major problem in Dundy County |
| Fillmore | Zone One (High) | 8.7 | Radon is an extreme problem in Fillmore County |
| Franklin | Zone One (High) | 6.8 | Radon is a major problem in Franklin County |
| Frontier | Zone One (High) | 5.5 | Radon is a major problem in Frontier County |
| Furnas | Zone One (High) | 6.1 | Radon is a major problem in Furnas County |
| Gage | Zone One (High) | 8.1 | Radon is an extreme problem in Gage County |
| Garden | Zone Three (Low) | 3.6 | Radon is a problem in Garden County |
| Garfield | Zone Three (Low) | 3.6 | Radon is a problem in Garfield County |
| Gosper | Zone One (High) | 5.5 | Radon is a major problem in Gosper County |
| Grant | Zone Three (Low) | 1.0 | Radon is a minor problem in Grant County |
| Greeley | Zone One (High) | 5.5 | Radon is a major problem in Greeley County |
| Hall | Zone Two (Mid) | 3.4 | Radon is a problem in Hall County |
| Hamilton | Zone One (High) | 7.4 | Radon is a major problem in Hamilton County |
| Harlan | Zone One (High) | 6.0 | Radon is a major problem in Harlan County |
| Hayes | Zone One (High) | 6.5 | Radon is a major problem in Hayes County |
| Hitchcock | Zone One (High) | 3.7 | Radon is a major problem in Hitchcock County |
| Holt | Zone Three (Low) | 3.9 | Radon is a problem in Holt County |
| Hooker | Zone Three (Low) | 1.5 | Radon is a minor problem in Hooker County |
| Howard | Zone Two (Mid) | 3.3 | Radon is a problem in Howard County |
| Jefferson | Zone One (High) | 8.4 | Radon is an extreme problem in Jefferson County |
| Johnson | Zone One (High) | 7.1 | Radon is a major problem in Johnson County |
| Kearney | Zone One (High) | 5.2 | Radon is a major problem in Kearney County |
| Keith | Zone Two (Mid) | 4.3 | Radon is a major problem in Keith County |
| Keya Paha | Zone Two (Mid) | 2.6 | Radon is a problem in Keya Paha County |
| Kimball | Zone Two (Mid) | 4.9 | Radon is a major problem in Kimball County |
| Knox | Zone One (High) | 8.6 | Radon is an extreme problem in Knox County |
| Lancaster | Zone One (High) | 5.1 | Radon is a major problem in Lancaster County |
| Lincoln | Zone Three (Low) | 2.9 | Radon is a problem in Lincoln County |
| Logan | Zone Three (Low) | 2.3 | Radon is a problem in Logan County |
| Loup | Zone Three (Low) | 1.3 | Radon is a minor problem in Loup County |
| McPherson | Zone Three (Low) | 1.7 | Radon is a minor problem in McPherson County |
| Madison | Zone One (High) | 7.4 | Radon is a major problem in Madison County |
| Merrick | Zone Two (Mid) | 2.3 | Radon is a problem in Merrick County |
| Morrill | Zone Two (Mid) | 4.2 | Radon is a major problem in Morrill County |
| Nance | Zone One (High) | 6.4 | Radon is a major problem in Nance County |
| Nemaha | Zone One (High) | 11.7 | Radon is an extreme problem in Nemaha County |
| Nuckolls | Zone One (High) | 8.8 | Radon is an extreme problem in Nuckolls County |
| Otoe | Zone One (High) | 7.6 | Radon is a major problem in Otoe County |
| Pawnee | Zone One (High) | 5.6 | Radon is a major problem in Pawnee County |
| Perkins | Zone Two (Mid) | 4.8 | Radon is a major problem in Perkins County |
| Phelps | Zone One (High) | 5.2 | Radon is a major problem in Phelps County |
| Pierce | Zone One (High) | 6.1 | Radon is a major problem in Pierce County |
| Platte | Zone One (High) | 5.4 | Radon is a major problem in Platte County |
| Polk | Zone One (High) | 7.9 | Radon is a major problem in Polk County |
| Red Willow | Zone One (High) | 4.7 | Radon is a major problem in Red Willow County |
| Richardson | Zone One (High) | 8.3 | Radon is an extreme problem in Richardson County |
| Rock | Zone Three (Low) | 3.0 | Radon is a problem in Rock County |
| Saline | Zone One (High) | 7.0 | Radon is a major problem in Saline County |
| Sarpy | Zone One (High) | 4.9 | Radon is a major problem in Sarpy County |
| Saunders | Zone One (High) | 8.1 | Radon is an extreme problem in Saunders County |
| Scotts Bluff | Zone Two (Mid) | 4.9 | Radon is a major problem in Scotts Bluff County |
| Seward | Zone One (High) | 8.5 | Radon is an extreme problem in Seward County |
| Sheridan | Zone Two (Mid) | 3.9 | Radon is a problem in Sheridan County |
| Sherman | Zone Two (Mid) | 4.4 | Radon is a major problem in Sherman County |
| Sioux | Zone Two (Mid) | 1.6 | Radon is a problem in Sioux County |
| Stanton | Zone One (High) | 8.7 | Radon is an extreme problem in Stanton County |
| Thayer | Zone One (High) | 9.8 | Radon is an extreme problem in Thayer County |
| Thomas | Zone Three (Low) | 1.4 | Radon is a minor problem in Thomas County |
| Thurston | Zone One (High) | 8.7 | Radon is an extreme problem in Thurston County |
| Valley | Zone Two (Mid) | 4.5 | Radon is a major problem in Valley County |
| Washington | Zone One (High) | 7.2 | Radon is a major problem in Washington County |
| Wayne | Zone One (High) | 10.3 | Radon is an extreme problem in Wayne County |
| Webster | Zone One (High) | 8.5 | Radon is an extreme problem in Webster County |
| Wheeler | Zone Three (Low) | 1.2 | Radon is a minor problem in Wheeler County |
| York | Zone One (High) | 8.8 | Radon is an extreme problem in York County |
Is Radon a Problem in Nevada?
| County Name | EPA Zone Designation (1=High, 2=Mid, 3=Low) | Average Radon Level (pCi/L) | Is Radon a Problem in this County? |
|---|---|---|---|
| Carson City | Zone One (High) | 3.8 | Radon is a major problem in Carson City County |
| Churchill | Zone Two (Mid) | 1.4 | Radon is a problem in Churchill County |
| Clark | Zone Three (Low) | 1.1 | Radon is a minor problem in Clark County |
| Douglas | Zone One (High) | 5.6 | Radon is a major problem in Douglas County |
| Elko | Zone Two (Mid) | 2.5 | Radon is a problem in Elko County |
| Esmeralda | Zone Two (Mid) | 0.6 | Radon is a problem in Esmeralda County |
| Eureka | Zone One (High) | 3.0 | Radon is a major problem in Eureka County |
| Humboldt | Zone Two (Mid) | 2.1 | Radon is a problem in Humboldt County |
| Lander | Zone One (High) | No Data | Radon is a major problem in Lander County |
| Lincoln | Zone One (High) | 3.0 | Radon is a major problem in Lincoln County |
| Lyon | Zone One (High) | 2.5 | Radon is a major problem in Lyon County |
| Mineral | Zone One (High) | 3.6 | Radon is a major problem in Mineral County |
| Nye | Zone Two (Mid) | 1.2 | Radon is a problem in Nye County |
| Pershing | Zone One (High) | 3.1 | Radon is a major problem in Pershing County |
| Storey | Zone Two (Mid) | 0.8 | Radon is a problem in Storey County |
| Washoe | Zone Two (Mid) | 3.2 | Radon is a problem in Washoe County |
| White Pine | Zone One (High) | 1.3 | Radon is a major problem in White Pine County |
Is Radon a Problem in New Hampshire?
| County Name | EPA Zone Designation (1=High, 2=Mid, 3=Low) | Average Radon Level (pCi/L) | Is Radon a Problem in this County? |
|---|---|---|---|
| Belknap | Zone Two (Mid) | 2.6 | Radon is a problem in Belknap County |
| Carroll | Zone One (High) | 8.1 | Radon is an extreme problem in Carroll County |
| Cheshire | Zone Two (Mid) | 3.2 | Radon is a problem in Cheshire County |
| Coos | Zone Two (Mid) | 8.5 | Radon is an extreme problem in Coos County |
| Grafton | Zone Two (Mid) | 4.4 | Radon is a major problem in Grafton County |
| Hillsborough | Zone Two (Mid) | 5.2 | Radon is a major problem in Hillsborough County |
| Merrimack | Zone Two (Mid) | 5.3 | Radon is a major problem in Merrimack County |
| Rockingham | Zone Two (Mid) | 5.5 | Radon is a major problem in Rockingham County |
| Strafford | Zone Two (Mid) | 6.0 | Radon is a major problem in Strafford County |
| Sullivan | Zone Two (Mid) | 2.2 | Radon is a problem in Sullivan County |
Is Radon a Problem in New Jersey?
| County Name | EPA Zone Designation (1=High, 2=Mid, 3=Low) | Average Radon Level (pCi/L) | Is Radon a Problem in this County? |
|---|---|---|---|
| Atlantic | Zone Three (Low) | 1.4 | Radon is a minor problem in Atlantic County |
| Bergen | Zone Two (Mid) | 1.8 | Radon is a problem in Bergen County |
| Burlington | Zone Two (Mid) | 2.1 | Radon is a problem in Burlington County |
| Camden | Zone Two (Mid) | 2.7 | Radon is a problem in Camden County |
| Cape May | Zone Three (Low) | 0.9 | Radon is a minor problem in Cape May County |
| Cumberland | Zone Two (Mid) | 1.8 | Radon is a problem in Cumberland County |
| Essex | Zone Two (Mid) | 1.7 | Radon is a problem in Essex County |
| Gloucester | Zone Two (Mid) | 3.2 | Radon is a problem in Gloucester County |
| Hudson | Zone Two (Mid) | 1.8 | Radon is a problem in Hudson County |
| Hunterdon | Zone One (High) | 10.0 | Radon is an extreme problem in Hunterdon County |
| Mercer | Zone One (High) | 7.9 | Radon is a major problem in Mercer County |
| Middlesex | Zone Two (Mid) | 2.6 | Radon is a problem in Middlesex County |
| Monmouth | Zone One (High) | 2.7 | Radon is a major problem in Monmouth County |
| Morris | Zone One (High) | 4.5 | Radon is a major problem in Morris County |
| Ocean | Zone Three (Low) | 1.4 | Radon is a minor problem in Ocean County |
| Passaic | Zone Two (Mid) | 2.5 | Radon is a problem in Passaic County |
| Salem | Zone Two (Mid) | 3.1 | Radon is a problem in Salem County |
| Somerset | Zone One (High) | 5.0 | Radon is a major problem in Somerset County |
| Sussex | Zone One (High) | 5.9 | Radon is a major problem in Sussex County |
| Union | Zone Two (Mid) | 2.3 | Radon is a problem in Union County |
| Warren | Zone One (High) | 10.8 | Radon is an extreme problem in Warren County |
Is Radon a Problem in New Mexico?
| County Name | EPA Zone Designation (1=High, 2=Mid, 3=Low) | Average Radon Level (pCi/L) | Is Radon a Problem in this County? |
|---|---|---|---|
| Bernalillo | Zone One (High) | 3.3 | Radon is a major problem in Bernalillo County |
| Catron | Zone Two (Mid) | 3.3 | Radon is a problem in Catron County |
| Chaves | Zone Two (Mid) | 4.1 | Radon is a major problem in Chaves County |
| Cibola | Zone Two (Mid) | 3.3 | Radon is a problem in Cibola County |
| Colfax | Zone One (High) | 5.9 | Radon is a major problem in Colfax County |
| Curry | Zone Two (Mid) | 1.2 | Radon is a problem in Curry County |
| De Baca | Zone Two (Mid) | No Data | Radon is a problem in De Baca County |
| Dona Ana | Zone Two (Mid) | 1.9 | Radon is a problem in Dona Ana County |
| Eddy | Zone Two (Mid) | 1.2 | Radon is a problem in Eddy County |
| Grant | Zone Two (Mid) | 3.9 | Radon is a problem in Grant County |
| Guadalupe | Zone Two (Mid) | 0.9 | Radon is a problem in Guadalupe County |
| Harding | Zone Two (Mid) | 1.6 | Radon is a problem in Harding County |
| Hidalgo | Zone Two (Mid) | 2.6 | Radon is a problem in Hidalgo County |
| Lea | Zone Two (Mid) | 1.6 | Radon is a problem in Lea County |
| Lincoln | Zone Two (Mid) | 2.8 | Radon is a problem in Lincoln County |
| Los Alamos | Zone Two (Mid) | 3.3 | Radon is a problem in Los Alamos County |
| Luna | Zone Two (Mid) | 2.8 | Radon is a problem in Luna County |
| McKinley | Zone Two (Mid) | 4.6 | Radon is a major problem in McKinley County |
| Mora | Zone One (High) | 5.2 | Radon is a major problem in Mora County |
| Otero | Zone Two (Mid) | 1.9 | Radon is a problem in Otero County |
| Quay | Zone Two (Mid) | 2.0 | Radon is a problem in Quay County |
| Rio Arriba | Zone One (High) | 3.9 | Radon is a major problem in Rio Arriba County |
| Roosevelt | Zone Two (Mid) | 1.9 | Radon is a problem in Roosevelt County |
| Sandoval | Zone Two (Mid) | 2.7 | Radon is a problem in Sandoval County |
| San Juan | Zone Two (Mid) | 2.0 | Radon is a problem in San Juan County |
| San Miguel | Zone One (High) | 5.4 | Radon is a major problem in San Miguel County |
| Santa Fe | Zone One (High) | 3.9 | Radon is a major problem in Santa Fe County |
| Sierra | Zone Two (Mid) | 2.9 | Radon is a problem in Sierra County |
| Socorro | Zone Two (Mid) | 6.1 | Radon is a major problem in Socorro County |
| Taos | Zone One (High) | 6.9 | Radon is a major problem in Taos County |
| Torrance | Zone Two (Mid) | 1.9 | Radon is a problem in Torrance County |
| Union | Zone Two (Mid) | 2.9 | Radon is a problem in Union County |
| Valencia | Zone Two (Mid) | 2.2 | Radon is a problem in Valencia County |
Is Radon a Problem in New York?
| County Name | EPA Zone Designation (1=High, 2=Mid, 3=Low) | Average Radon Level (pCi/L) | Is Radon a Problem in this County? |
|---|---|---|---|
| Albany | Zone One (High) | 3.1 | Radon is a major problem in Albany County |
| Allegany | Zone One (High) | 7.8 | Radon is a major problem in Allegany County |
| Bronx | Zone Three (Low) | 107.3 | Radon is an extreme problem in Bronx County |
| Broome | Zone One (High) | 2.9 | Radon is a major problem in Broome County |
| Cattaraugus | Zone One (High) | 6.0 | Radon is a major problem in Cattaraugus County |
| Cayuga | Zone One (High) | 3.5 | Radon is a major problem in Cayuga County |
| Chautauqua | Zone One (High) | 5.1 | Radon is a major problem in Chautauqua County |
| Chemung | Zone One (High) | 9.0 | Radon is an extreme problem in Chemung County |
| Chenango | Zone One (High) | 5.4 | Radon is a major problem in Chenango County |
| Clinton | Zone Two (Mid) | 1.5 | Radon is a problem in Clinton County |
| Columbia | Zone One (High) | 5.3 | Radon is a major problem in Columbia County |
| Cortland | Zone One (High) | 7.8 | Radon is a major problem in Cortland County |
| Delaware | Zone One (High) | 4.4 | Radon is a major problem in Delaware County |
| Dutchess | Zone One (High) | 4.9 | Radon is a major problem in Dutchess County |
| Erie | Zone One (High) | 3.6 | Radon is a major problem in Erie County |
| Essex | Zone Three (Low) | 1.5 | Radon is a minor problem in Essex County |
| Franklin | Zone Three (Low) | 1.4 | Radon is a minor problem in Essex County |
| Fulton | Zone Three (Low) | 1.7 | Radon is a minor problem in Fulton County |
| Genesee | Zone One (High) | 4.1 | Radon is a major problem in Genesee County |
| Greene | Zone One (High) | 3.6 | Radon is a major problem in Greene County |
| Hamilton | Zone Three (Low) | 1.1 | Radon is a minor problem in Hamilton County |
| Herkimer | Zone Three (Low) | 5.0 | Radon is a major problem in Herkimer County |
| Jefferson | Zone Two (Mid) | 2.5 | Radon is a problem in Jefferson County |
| Kings | Zone Three (Low) | 1.7 | Radon is a minor problem in Kings County |
| Lewis | Zone Two (Mid) | 3.2 | Radon is a problem in Lewis County |
| Livingston | Zone One (High) | 6.1 | Radon is a major problem in Livingston County |
| Madison | Zone One (High) | 4.1 | Radon is a major problem in Madison County |
| Monroe | Zone Two (Mid) | 2.3 | Radon is a problem in Monroe County |
| Montgomery | Zone Two (Mid) | 2.4 | Radon is a problem in Montgomery County |
| Nassau | Zone Three (Low) | 1.9 | Radon is a minor problem in Nassau County |
| New York City | Zone Three (Low) | 2.4 | Radon is a problem in New York City County |
| Niagara | Zone Two (Mid) | 2.0 | Radon is a problem in Niagara County |
| Oneida | Zone Two (Mid) | 4.4 | Radon is a major problem in Oneida County |
| Onondaga | Zone One (High) | 4.2 | Radon is a major problem in Onondaga County |
| Ontario | Zone One (High) | 4.3 | Radon is a major problem in Ontario County |
| Orange | Zone One (High) | 3.8 | Radon is a major problem in Orange County |
| Orleans | Zone Two (Mid) | 3.1 | Radon is a problem in Orleans County |
| Oswego | Zone Two (Mid) | 2.5 | Radon is a problem in Oswego County |
| Otsego | Zone One (High) | 5.9 | Radon is a major problem in Otsego County |
| Putnam | Zone One (High) | 3.8 | Radon is a major problem in Putnam County |
| Queens | Zone Three (Low) | 1.8 | Radon is a minor problem in Queens County |
| Rensselaer | Zone One (High) | 4.3 | Radon is a major problem in Rensselaer County |
| Richmond | Zone Three (Low) | 1.7 | Radon is a minor problem in Richmond County |
| Rockland | Zone Three (Low) | 2.4 | Radon is a problem in Rockland County |
| Saint Lawrence (St. Lawrence) | Zone Two (Mid) | 2.8 | Radon is a problem in Saint Lawrence County |
| Saratoga | Zone Two (Mid) | 3.1 | Radon is a problem in Saratoga County |
| Schenectady | Zone Two (Mid) | 2.6 | Radon is a problem in Schenectady County |
| Schoharie | Zone One (High) | 4.0 | Radon is a major problem in Schoharie County |
| Schuyler | Zone One (High) | 5.7 | Radon is a major problem in Schuyler County |
| Seneca | Zone One (High) | 5.0 | Radon is a major problem in Seneca County |
| Steuben | Zone One (High) | 6.7 | Radon is a major problem in Steuben County |
| Suffolk | Zone Three (Low) | 1.8 | Radon is a minor problem in Suffolk County |
| Sullivan | Zone One (High) | 2.5 | Radon is a major problem in Sullivan County |
| Tioga | Zone One (High) | 6.1 | Radon is a major problem in Tioga County |
| Tompkins | Zone One (High) | 3.6 | Radon is a major problem in Tompkins County |
| Ulster | Zone One (High) | 3.8 | Radon is a major problem in Ulster County |
| Warren | Zone Three (Low) | 2.5 | Radon is a problem in Warren County |
| Washington | Zone One (High) | 3.6 | Radon is a major problem in Washington County |
| Wayne | Zone Two (Mid) | 3.6 | Radon is a problem in Wayne County |
| Westchester | Zone Three (Low) | 2.5 | Radon is a problem in Westchester County |
| Wyoming | Zone One (High) | 5.7 | Radon is a major problem in Wyoming County |
| Yates | Zone One (High) | 3.3 | Radon is a major problem in Yates County |
Is Radon a Problem in North Carolina?
| County Name | EPA Zone Designation (1=High, 2=Mid, 3=Low) | Average Radon Level (pCi/L) | Is Radon a Problem in this County? |
|---|---|---|---|
| Alamance | Zone Three (Low) | 0.6 | Radon is a minor problem in Alamance County |
| Alexander | Zone Two (Mid) | 8.6 | Radon is an extreme problem in Alexander County |
| Alleghany | Zone One (High) | 5.4 | Radon is a major problem in Alleghany County |
| Anson | Zone Three (Low) | 1.0 | Radon is a minor problem in Anson County |
| Ashe | Zone Two (Mid) | 3.3 | Radon is a problem in Ashe County |
| Avery | Zone Two (Mid) | 5.1 | Radon is a problem in Avery County |
| Beaufort | Zone Three (Low) | 0.6 | Radon is a minor problem in Beaufort County |
| Bertie | Zone Three (Low) | 1.2 | Radon is a minor problem in Bertie County |
| Bladen | Zone Three (Low) | 0.5 | Radon is a minor problem in Bladen County |
| Brunswick | Zone Three (Low) | 0.4 | Radon is a minor problem in Brunswick County |
| Buncombe | Zone One (High) | 3.4 | Radon is a major problem in Buncombe County |
| Burke | Zone Two (Mid) | 3.4 | Radon is a problem in Burke County |
| Cabarrus | Zone Three (Low) | 1.7 | Radon is a minor problem in Cabarrus County |
| Caldwell | Zone Two (Mid) | 3.4 | Radon is a problem in Caldwell County |
| Camden | Zone Three (Low) | 1.5 | Radon is a minor problem in Camden County |
| Carteret | Zone Three (Low) | 0.4 | Radon is a minor problem in Carteret County |
| Caswell | Zone Two (Mid) | 2.8 | Radon is a problem in Caswell County |
| Catawba | Zone Two (Mid) | 2.5 | Radon is a problem in Catawba County |
| Chatham | Zone Three (Low) | 1.1 | Radon is a minor problem in Chatham County |
| Cherokee | Zone One (High) | 4.7 | Radon is a major problem in Cherokee County |
| Chowan | Zone Three (Low) | 0.3 | Radon is a minor problem in Chowan County |
| Clay | Zone Two (Mid) | 4.1 | Radon is a major problem in Clay County |
| Cleveland | Zone Two (Mid) | 4.7 | Radon is a major problem in Cleveland County |
| Columbus | Zone Three (Low) | 0.4 | Radon is a minor problem in Columbus County |
| Craven | Zone Three (Low) | 0.6 | Radon is a minor problem in Craven County |
| Cumberland | Zone Three (Low) | 1.3 | Radon is a minor problem in Cumberland County |
| Currituck | Zone Three (Low) | 0.6 | Radon is a minor problem in Currituck County |
| Dare | Zone Three (Low) | 2.4 | Radon is a problem in Dare County |
| Davidson | Zone Three (Low) | 2.3 | Radon is a problem in Davidson County |
| Davie | Zone Three (Low) | 2.4 | Radon is a problem in Davie County |
| Duplin | Zone Three (Low) | 0.8 | Radon is a minor problem in Duplin County |
| Durham | Zone Three (Low) | 1.3 | Radon is a minor problem in Durham County |
| Edgecombe | Zone Three (Low) | 1.4 | Radon is a minor problem in Edgecombe County |
| Forsyth | Zone Two (Mid) | 3.5 | Radon is a problem in Forsyth County |
| Franklin | Zone Two (Mid) | 1.8 | Radon is a problem in Franklin County |
| Gaston | Zone Two (Mid) | 2.7 | Radon is a problem in Gaston County |
| Gates | Zone Three (Low) | 0.2 | Radon is a minor problem in Gates County |
| Graham | Zone Two (Mid) | 5.3 | Radon is a major problem in Graham County |
| Granville | Zone Three (Low) | 1.5 | Radon is a minor problem in Granville County |
| Greene | Zone Three (Low) | 1.1 | Radon is a minor problem in Greene County |
| Guilford | Zone Three (Low) | 1.5 | Radon is a minor problem in Guilford County |
| Halifax | Zone Three (Low) | 3.3 | Radon is a problem in Halifax County |
| Harnett | Zone Three (Low) | 0.7 | Radon is a minor problem in Harnett County |
| Haywood | Zone Two (Mid) | 3.9 | Radon is a problem in Haywood County |
| Henderson | Zone One (High) | 5.4 | Radon is a major problem in Henderson County |
| Hertford | Zone Three (Low) | 1.3 | Radon is a minor problem in Hertford County |
| Hoke | Zone Three (Low) | 1.1 | Radon is a minor problem in Hoke County |
| Hyde | Zone Three (Low) | 0.6 | Radon is a minor problem in Hyde County |
| Iredell | Zone Two (Mid) | 2.3 | Radon is a problem in Iredell County |
| Jackson | Zone Two (Mid) | 2.9 | Radon is a problem in Jackson County |
| Johnston | Zone Three (Low) | 1.2 | Radon is a minor problem in Johnston County |
| Jones | Zone Three (Low) | 0.8 | Radon is a minor problem in Jones County |
| Lee | Zone Three (Low) | 1.0 | Radon is a minor problem in Lee County |
| Lenoir | Zone Three (Low) | 0.7 | Radon is a minor problem in Lenoir County |
| Lincoln | Zone Two (Mid) | 3.8 | Radon is a problem in Lincoln County |
| McDowell | Zone Two (Mid) | 4.9 | Radon is a major problem in McDowell County |
| Macon | Zone Two (Mid) | 2.2 | Radon is a problem in Macon County |
| Madison | Zone Two (Mid) | 2.6 | Radon is a problem in Madison County |
| Martin | Zone Three (Low) | 8.6 | Radon is an extreme problem in Martin County |
| Mecklenburg | Zone Three (Low) | 1.4 | Radon is a minor problem in Mecklenburg County |
| Mitchell | Zone One (High) | 2.9 | Radon is a major problem in Mitchell County |
| Montgomery | Zone Three (Low) | 1.9 | Radon is a minor problem in Montgomery County |
| Moore | Zone Three (Low) | 1.3 | Radon is a minor problem in Moore County |
| Nash | Zone Three (Low) | 0.9 | Radon is a minor problem in Nash County |
| New Hanover | Zone Three (Low) | 1.0 | Radon is a minor problem in New Hanover County |
| Northampton | Zone Three (Low) | 5.8 | Radon is a major problem in Northampton County |
| Onslow | Zone Three (Low) | 1.4 | Radon is a minor problem in Onslow County |
| Orange | Zone Three (Low) | 1.7 | Radon is a minor problem in Orange County |
| Pamlico | Zone Three (Low) | No Data | Radon is a minor problem in Pamlico County |
| Pasquotank | Zone Three (Low) | 0.8 | Radon is a minor problem in Pasquotank County |
| Pender | Zone Three (Low) | 0.4 | Radon is a minor problem in Pender County |
| Perquimans | Zone Three (Low) | 0.3 | Radon is a minor problem in Perquimans County |
| Person | Zone Three (Low) | 1.7 | Radon is a minor problem in Person County |
| Pitt | Zone Three (Low) | 0.7 | Radon is a minor problem in Pitt County |
| Polk | Zone Two (Mid) | 3.6 | Radon is a problem in Polk County |
| Randolph | Zone Three (Low) | 1.5 | Radon is a minor problem in Randolph County |
| Richmond | Zone Three (Low) | 0.8 | Radon is a minor problem in Richmond County |
| Robeson | Zone Three (Low) | 0.5 | Radon is a minor problem in Robeson County |
| Rockingham | Zone One (High) | 3.7 | Radon is a major problem in Rockingham County |
| Rowan | Zone Three (Low) | 2.1 | Radon is a problem in Rowan County |
| Rutherford | Zone Two (Mid) | 3.2 | Radon is a problem in Rutherford County |
| Sampson | Zone Three (Low) | 0.2 | Radon is a minor problem in Sampson County |
| Scotland | Zone Three (Low) | 1.0 | Radon is a minor problem in Scotland County |
| Stanly | Zone Three (Low) | 2.7 | Radon is a problem in Stanly County |
| Stokes | Zone Two (Mid) | 2.5 | Radon is a problem in Stokes County |
| Surry | Zone Two (Mid) | 3.6 | Radon is a problem in Surry County |
| Swain | Zone Two (Mid) | 4.2 | Radon is a major problem in Swain County |
| Transylvania | Zone One (High) | 6.6 | Radon is a major problem in Transylvania County |
| Tyrrell | Zone Three (Low) | No Data | Radon is a minor problem in Tyrrell County |
| Union | Zone Three (Low) | 1.5 | Radon is a minor problem in Union County |
| Vance | Zone Two (Mid) | 2.9 | Radon is a problem in Vance County |
| Wake | Zone Two (Mid) | 1.6 | Radon is a problem in Wake County |
| Warren | Zone Two (Mid) | 2.2 | Radon is a problem in Warren County |
| Washington | Zone Three (Low) | 1.8 | Radon is a minor problem in Washington County |
| Watauga | Zone One (High) | 6.4 | Radon is a major problem in Watauga County |
| Wayne | Zone Three (Low) | 0.7 | Radon is a minor problem in Wayne County |
| Wilkes | Zone Two (Mid) | 3.7 | Radon is a problem in Wilkes County |
| Wilson | Zone Three (Low) | 0.8 | Radon is a minor problem in Wilson County |
| Yadkin | Zone Two (Mid) | 3.0 | Radon is a problem in Yadkin County |
| Yancey | Zone Two (Mid) | 3.5 | Radon is a problem in Yancey County |
Is Radon a Problem in North Dakota?
| County Name | EPA Zone Designation (1=High, 2=Mid, 3=Low) | Average Radon Level (pCi/L) | Is Radon a Problem in this County? |
|---|---|---|---|
| Adams | Zone One (High) | 8.9 | Radon is an extreme problem in Adams County |
| Barnes | Zone One (High) | 6.2 | Radon is a major problem in Barnes County |
| Benson | Zone One (High) | 5.4 | Radon is a major problem in Benson County |
| Billings | Zone One (High) | 4.7 | Radon is a major problem in Billings County |
| Bottineau | Zone One (High) | 7.2 | Radon is a major problem in Bottineau County |
| Bowman | Zone One (High) | 9.9 | Radon is an extreme problem in Bowman County |
| Burke | Zone One (High) | 5.9 | Radon is a major problem in Burke County |
| Burleigh | Zone One (High) | 4.0 | Radon is a major problem in Burleigh County |
| Cass | Zone One (High) | 5.2 | Radon is a major problem in Cass County |
| Cavalier | Zone One (High) | 5.1 | Radon is a major problem in Cavalier County |
| Dickey | Zone One (High) | 4.5 | Radon is a major problem in Dickey County |
| Divide | Zone One (High) | 5.3 | Radon is a major problem in Divide County |
| Dunn | Zone One (High) | 7.8 | Radon is a major problem in Dunn County |
| Eddy | Zone One (High) | 4.5 | Radon is a major problem in Eddy County |
| Emmons | Zone One (High) | 6.1 | Radon is a major problem in Emmons County |
| Foster | Zone One (High) | 6.5 | Radon is a major problem in Foster County |
| Golden Valley | Zone One (High) | 3.6 | Radon is a major problem in Golden Valley County |
| Grand Forks | Zone One (High) | 6.6 | Radon is a major problem in Grand Forks County |
| Grant | Zone One (High) | 8.2 | Radon is an extreme problem in Grant County |
| Griggs | Zone One (High) | 4.7 | Radon is a major problem in Griggs County |
| Hettinger | Zone One (High) | 8.6 | Radon is an extreme problem in Hettinger County |
| Kidder | Zone One (High) | 5.4 | Radon is a major problem in Kidder County |
| LaMoure | Zone One (High) | 5.7 | Radon is a major problem in LaMoure County |
| Logan | Zone One (High) | 6.2 | Radon is a major problem in Logan County |
| McHenry | Zone One (High) | 5.4 | Radon is a major problem in McHenry County |
| McIntosh | Zone One (High) | 5.9 | Radon is a major problem in McIntosh County |
| McKenzie | Zone One (High) | 5.7 | Radon is a major problem in McKenzie County |
| McLean | Zone One (High) | 5.7 | Radon is a major problem in McLean County |
| Mercer | Zone One (High) | 7.2 | Radon is a major problem in Mercer County |
| Morton | Zone One (High) | 6.0 | Radon is a major problem in Morton County |
| Mountrail | Zone One (High) | 8.6 | Radon is an extreme problem in Mountrail County |
| Nelson | Zone One (High) | 6.0 | Radon is a major problem in Nelson County |
| Oliver | Zone One (High) | 3.6 | Radon is a major problem in Oliver County |
| Pembina | Zone One (High) | 9.9 | Radon is an extreme problem in Pembina County |
| Pierce | Zone One (High) | 4.2 | Radon is a major problem in Pierce County |
| Ramsey | Zone One (High) | 5.5 | Radon is a major problem in Ramsey County |
| Ransom | Zone One (High) | 8.4 | Radon is an extreme problem in Ransom County |
| Renville | Zone One (High) | 4.3 | Radon is a major problem in Renville County |
| Richland | Zone One (High) | 4.4 | Radon is a major problem in Richland County |
| Rolette | Zone One (High) | 6.5 | Radon is a major problem in Rolette County |
| Sargent | Zone One (High) | 5.2 | Radon is a major problem in Sargent County |
| Sheridan | Zone One (High) | 6.2 | Radon is a major problem in Sheridan County |
| Sioux | Zone One (High) | 2.4 | Radon is a major problem in Sioux County |
| Slope | Zone One (High) | 13.2 | Radon is an extreme problem in Slope County |
| Stark | Zone One (High) | 8.8 | Radon is an extreme problem in Stark County |
| Steele | Zone One (High) | 3.5 | Radon is a major problem in Steele County |
| Stutsman | Zone One (High) | 6.0 | Radon is a major problem in Stutsman County |
| Towner | Zone One (High) | 5.2 | Radon is a major problem in Towner County |
| Traill | Zone One (High) | 5.1 | Radon is a major problem in Traill County |
| Walsh | Zone One (High) | 9.7 | Radon is an extreme problem in Walsh County |
| Ward | Zone One (High) | 5.1 | Radon is a major problem in Ward County |
| Wells | Zone One (High) | 4.2 | Radon is a major problem in Wells County |
| Williams | Zone One (High) | 4.3 | Radon is a major problem in Williams County |
Is Radon a Problem in Ohio?
| County Name | EPA Zone Designation (1=High, 2=Mid, 3=Low) | Average Radon Level (pCi/L) | Is Radon a Problem in this County? |
|---|---|---|---|
| Adams | Zone One (High) | 6.7 | Radon is a major problem in Adams County |
| Allen | Zone One (High) | 6.3 | Radon is a major problem in Allen County |
| Ashland | Zone One (High) | 8.6 | Radon is an extreme problem in Ashland County |
| Ashtabula | Zone Two (Mid) | 4.4 | Radon is a major problem in Ashtabula County |
| Athens | Zone Two (Mid) | 4.9 | Radon is a major problem in Athens County |
| Auglaize | Zone One (High) | 7.8 | Radon is a major problem in Auglaize County |
| Belmont | Zone One (High) | 6.8 | Radon is a major problem in Belmont County |
| Brown | Zone Two (Mid) | 1.9 | Radon is a problem in Brown County |
| Butler | Zone One (High) | 5.0 | Radon is a major problem in Butler County |
| Carroll | Zone One (High) | 13.0 | Radon is an extreme problem in Carroll County |
| Champaign | Zone One (High) | 9.1 | Radon is an extreme problem in Champaign County |
| Clark | Zone One (High) | 8.0 | Radon is an extreme problem in Clark County |
| Clermont | Zone Two (Mid) | 4.4 | Radon is a major problem in Clermont County |
| Clinton | Zone One (High) | 6.4 | Radon is a major problem in Clinton County |
| Columbiana | Zone One (High) | 9.8 | Radon is an extreme problem in Columbiana County |
| Coshocton | Zone One (High) | 13.0 | Radon is an extreme problem in Coshocton County |
| Crawford | Zone One (High) | 6.7 | Radon is a major problem in Crawford County |
| Cuyahoga | Zone Two (Mid) | 2.7 | Radon is a problem in Cuyahoga County |
| Darke | Zone One (High) | 7.8 | Radon is a major problem in Darke County |
| Defiance | Zone Two (Mid) | 1.8 | Radon is a problem in Defiance County |
| Delaware | Zone One (High) | 6.2 | Radon is a major problem in Delaware County |
| Erie | Zone Two (Mid) | 6.4 | Radon is a major problem in Erie County |
| Fairfield | Zone One (High) | 7.2 | Radon is a major problem in Fairfield County |
| Fayette | Zone One (High) | 4.8 | Radon is a major problem in Fayette County |
| Franklin | Zone One (High) | 8.3 | Radon is an extreme problem in Franklin County |
| Fulton | Zone Two (Mid) | 3.6 | Radon is a problem in Fulton County |
| Gallia | Zone Two (Mid) | 2.0 | Radon is a problem in Gallia County |
| Geauga | Zone Two (Mid) | 2.7 | Radon is a problem in Geauga County |
| Greene | Zone One (High) | 7.3 | Radon is a major problem in Greene County |
| Guernsey | Zone One (High) | 6.1 | Radon is a major problem in Guernsey County |
| Hamilton | Zone One (High) | 3.4 | Radon is a major problem in Hamilton County |
| Hancock | Zone One (High) | 5.0 | Radon is a major problem in Hancock County |
| Hardin | Zone One (High) | 4.7 | Radon is a major problem in Hardin County |
| Harrison | Zone One (High) | 13.2 | Radon is an extreme problem in Harrison County |
| Henry | Zone Two (Mid) | 3.6 | Radon is a problem in Henry County |
| Highland | Zone Two (Mid) | 3.8 | Radon is a problem in Highland County |
| Hocking | Zone Two (Mid) | 5.2 | Radon is a major problem in Hocking County |
| Holmes | Zone One (High) | 9.3 | Radon is an extreme problem in Holmes County |
| Huron | Zone One (High) | 9.5 | Radon is an extreme problem in Huron County |
| Jackson | Zone Two (Mid) | 3.4 | Radon is a problem in Jackson County |
| Jefferson | Zone One (High) | 11.8 | Radon is an extreme problem in Jefferson County |
| Knox | Zone One (High) | 24.6 | Radon is an extreme problem in Knox County |
| Lake | Zone Two (Mid) | 3.5 | Radon is a problem in Lake County |
| Lawrence | Zone Two (Mid) | 7.3 | Radon is a major problem in Lawrence County |
| Licking | Zone One (High) | 16.3 | Radon is an extreme problem in Licking County |
| Logan | Zone One (High) | 13.8 | Radon is an extreme problem in Logan County |
| Lorain | Zone Two (Mid) | 4.2 | Radon is a major problem in Lorain County |
| Lucas | Zone Two (Mid) | 2.3 | Radon is a problem in Lucas County |
| Madison | Zone One (High) | 7.0 | Radon is a major problem in Madison County |
| Mahoning | Zone Two (Mid) | 2.9 | Radon is a problem in Mahoning County |
| Marion | Zone One (High) | 7.0 | Radon is a major problem in Marion County |
| Medina | Zone Two (Mid) | 3.5 | Radon is a problem in Medina County |
| Meigs | Zone Two (Mid) | 2.5 | Radon is a problem in Meigs County |
| Mercer | Zone One (High) | 7.1 | Radon is a major problem in Mercer County |
| Miami | Zone One (High) | 8.7 | Radon is an extreme problem in Miami County |
| Monroe | Zone Two (Mid) | 3.6 | Radon is a problem in Monroe County |
| Montgomery | Zone One (High) | 5.7 | Radon is a major problem in Montgomery County |
| Morgan | Zone Two (Mid) | 3.4 | Radon is a problem in Morgan County |
| Morrow | Zone One (High) | 7.0 | Radon is a major problem in Morrow County |
| Muskingum | Zone One (High) | 7.2 | Radon is a major problem in Muskingum County |
| Noble | Zone Two (Mid) | 2.7 | Radon is a problem in Noble County |
| Ottawa | Zone Two (Mid) | 3.8 | Radon is a problem in Ottawa County |
| Paulding | Zone Two (Mid) | 2.1 | Radon is a problem in Paulding County |
| Perry | Zone One (High) | 10.3 | Radon is an extreme problem in Perry County |
| Pickaway | Zone One (High) | 10.9 | Radon is an extreme problem in Pickaway County |
| Pike | Zone One (High) | 7.1 | Radon is a major problem in Pike County |
| Portage | Zone Two (Mid) | 4.1 | Radon is a major problem in Portage County |
| Preble | Zone One (High) | 7.9 | Radon is a major problem in Preble County |
| Putnam | Zone Two (Mid) | 5.9 | Radon is a major problem in Putnam County |
| Richland | Zone One (High) | 10.4 | Radon is an extreme problem in Richland County |
| Ross | Zone One (High) | 12.1 | Radon is an extreme problem in Ross County |
| Sandusky | Zone Two (Mid) | 5.8 | Radon is a major problem in Sandusky County |
| Scioto | Zone Two (Mid) | 3.8 | Radon is a problem in Scioto County |
| Seneca | Zone One (High) | 6.7 | Radon is a major problem in Seneca County |
| Shelby | Zone One (High) | 7.0 | Radon is a major problem in Shelby County |
| Stark | Zone One (High) | 7.4 | Radon is a major problem in Stark County |
| Summit | Zone One (High) | 4.3 | Radon is a major problem in Summit County |
| Trumbull | Zone Two (Mid) | 2.5 | Radon is a problem in Trumbull County |
| Tuscarawas | Zone One (High) | 9.6 | Radon is an extreme problem in Tuscarawas County |
| Union | Zone One (High) | 5.1 | Radon is a major problem in Union County |
| Van Wert | Zone One (High) | 4.2 | Radon is a major problem in Van Wert County |
| Vinton | Zone Two (Mid) | 3.4 | Radon is a problem in Vinton County |
| Warren | Zone One (High) | 4.7 | Radon is a major problem in Warren County |
| Washington | Zone Two (Mid) | 6.2 | Radon is a major problem in Washington County |
| Wayne | Zone One (High) | 11.2 | Radon is an extreme problem in Wayne County |
| Williams | Zone Two (Mid) | 4.6 | Radon is a major problem in Williams County |
| Wood | Zone Two (Mid) | 3.1 | Radon is a problem in Wood County |
| Wyandot | Zone One (High) | 5.2 | Radon is a major problem in Wyandot County |
Is Radon a Problem in Oklahoma?
| County Name | EPA Zone Designation (1=High, 2=Mid, 3=Low) | Average Radon Level (pCi/L) | Is Radon a Problem in this County? |
|---|---|---|---|
| Adair | Zone Two (Mid) | 2.7 | Radon is a problem in Adair County |
| Alfalfa | Zone Three (Low) | 1.1 | Radon is a minor problem in Alfalfa County |
| Atoka | Zone Three (Low) | No Data | Radon is a minor problem in Atoka County |
| Beaver | Zone Two (Mid) | 3.1 | Radon is a problem in Beaver County |
| Beckham | Zone Three (Low) | 3.3 | Radon is a problem in Beckham County |
| Blaine | Zone Three (Low) | 1.4 | Radon is a minor problem in Blaine County |
| Bryan | Zone Three (Low) | 1.0 | Radon is a minor problem in Bryan County |
| Caddo | Zone Three (Low) | 1.5 | Radon is a minor problem in Caddo County |
| Canadian | Zone Three (Low) | 7.7 | Radon is a major problem in Canadian County |
| Carter | Zone Three (Low) | 4.8 | Radon is a major problem in Carter County |
| Cherokee | Zone Two (Mid) | 5.9 | Radon is a major problem in Cherokee County |
| Choctaw | Zone Three (Low) | 3.3 | Radon is a problem in Choctaw County |
| Cimarron | Zone Two (Mid) | 5.0 | Radon is a major problem in Cimarron County |
| Cleveland | Zone Three (Low) | 1.2 | Radon is a minor problem in Cleveland County |
| Coal | Zone Three (Low) | No Data | Radon is a minor problem in Coal County |
| Comanche | Zone Three (Low) | 0.5 | Radon is a minor problem in Comanche County |
| Cotton | Zone Three (Low) | No Data | Radon is a minor problem in Cotton County |
| Craig | Zone Three (Low) | 3.5 | Radon is a problem in Craig County |
| Creek | Zone Three (Low) | 0.8 | Radon is a minor problem in Creek County |
| Custer | Zone Three (Low) | 0.8 | Radon is a minor problem in Custer County |
| Delaware | Zone Two (Mid) | 8.5 | Radon is an extreme problem in Delaware County |
| Dewey | Zone Three (Low) | 6.3 | Radon is a major problem in Dewey County |
| Ellis | Zone Two (Mid) | 2.4 | Radon is a problem in Ellis County |
| Garfield | Zone Three (Low) | 3.1 | Radon is a problem in Garfield County |
| Garvin | Zone Three (Low) | 0.8 | Radon is a minor problem in Garvin County |
| Grady | Zone Three (Low) | 1.2 | Radon is a minor problem in Grady County |
| Grant | Zone Three (Low) | 1.2 | Radon is a minor problem in Grant County |
| Greer | Zone Three (Low) | No Data | Radon is a minor problem in Greer County |
| Harmon | Zone Three (Low) | No Data | Radon is a minor problem in Harmon County |
| Harper | Zone Three (Low) | No Data | Radon is a minor problem in Harper County |
| Haskell | Zone Three (Low) | 1.0 | Radon is a minor problem in Haskell County |
| Hughes | Zone Three (Low) | 1.1 | Radon is a minor problem in Hughes County |
| Jackson | Zone Three (Low) | 1.8 | Radon is a minor problem in Jackson County |
| Jefferson | Zone Three (Low) | No Data | Radon is a minor problem in Jefferson County |
| Johnston | Zone Three (Low) | 29.9 | Radon is an extreme problem in Johnston County |
| Kay | Zone Three (Low) | 2.0 | Radon is a problem in Kay County |
| Kingfisher | Zone Three (Low) | 0.7 | Radon is a minor problem in Kingfisher County |
| Kiowa | Zone Three (Low) | 2.3 | Radon is a problem in Kiowa County |
| Latimer | Zone Three (Low) | 1.3 | Radon is a minor problem in Latimer County |
| Le Flore | Zone Three (Low) | 2.1 | Radon is a problem in Le Flore County |
| Lincoln | Zone Three (Low) | 0.3 | Radon is a minor problem in Lincoln County |
| Logan | Zone Three (Low) | 1.3 | Radon is a minor problem in Logan County |
| Love | Zone Three (Low) | No Data | Radon is a minor problem in Love County |
| McClain | Zone Three (Low) | 2.5 | Radon is a problem in McClain County |
| McCurtain | Zone Three (Low) | 1.7 | Radon is a minor problem in McCurtain County |
| McIntosh | Zone Three (Low) | 0.9 | Radon is a minor problem in McIntosh County |
| Major | Zone Three (Low) | 2.2 | Radon is a problem in Major County |
| Marshall | Zone Three (Low) | 1.3 | Radon is a minor problem in Marshall County |
| Mayes | Zone Two (Mid) | 9.3 | Radon is an extreme problem in Mayes County |
| Murray | Zone Three (Low) | 1.3 | Radon is a minor problem in Murray County |
| Muskogee | Zone Three (Low) | 0.7 | Radon is a minor problem in Muskogee County |
| Noble | Zone Three (Low) | 1.1 | Radon is a minor problem in Noble County |
| Nowata | Zone Three (Low) | 3.7 | Radon is a problem in Nowata County |
| Okfuskee | Zone Three (Low) | No Data | Radon is a minor problem in Okfuskee County |
| Oklahoma | Zone Three (Low) | 1.4 | Radon is a minor problem in Oklahoma County |
| Okmulgee | Zone Three (Low) | 0.7 | Radon is a minor problem in Okmulgee County |
| Osage | Zone Three (Low) | 0.8 | Radon is a minor problem in Osage County |
| Ottawa | Zone Three (Low) | 5.0 | Radon is a major problem in Ottawa County |
| Pawnee | Zone Three (Low) | 1.3 | Radon is a minor problem in Pawnee County |
| Payne | Zone Three (Low) | 1.5 | Radon is a minor problem in Payne County |
| Pittsburg | Zone Three (Low) | 0.5 | Radon is a minor problem in Pittsburg County |
| Pontotoc | Zone Three (Low) | 2.2 | Radon is a problem in Pontotoc County |
| Pottawatomie | Zone Three (Low) | 0.4 | Radon is a minor problem in Pottawatomie County |
| Pushmataha | Zone Three (Low) | 0.6 | Radon is a minor problem in Pushmataha County |
| Roger Mills | Zone Three (Low) | 3.2 | Radon is a problem in Roger Mills County |
| Rogers | Zone Three (Low) | 3.2 | Radon is a problem in Rogers County |
| Seminole | Zone Three (Low) | 0.6 | Radon is a minor problem in Seminole County |
| Sequoyah | Zone Two (Mid) | 1.3 | Radon is a minor problem in Sequoyah County |
| Stephens | Zone Three (Low) | 2.5 | Radon is a problem in Stephens County |
| Texas | Zone Two (Mid) | 5.6 | Radon is a major problem in Texas County |
| Tillman | Zone Three (Low) | 0.7 | Radon is a minor problem in Tillman County |
| Tulsa | Zone Three (Low) | 1.2 | Radon is a minor problem in Tulsa County |
| Wagoner | Zone Three (Low) | 1.1 | Radon is a minor problem in Wagoner County |
| Washington | Zone Three (Low) | 1.0 | Radon is a minor problem in Washington County |
| Washita | Zone Three (Low) | 3.1 | Radon is a problem in Washita County |
| Woods | Zone Three (Low) | 0.9 | Radon is a minor problem in Woods County |
| Woodward | Zone Three (Low) | 1.7 | Radon is a minor problem in Woodward County |
Is Radon a Problem in Oregon?
| County Name | EPA Zone Designation (1=High, 2=Mid, 3=Low) | Average Radon Level (pCi/L) | Is Radon a Problem in this County? |
|---|---|---|---|
| Baker | Zone Two (Mid) | 4.5 | Radon is a major problem in Baker County |
| Benton | Zone Three (Low) | 2.3 | Radon is a problem in Benton County |
| Clackamas | Zone Three (Low) | 2.8 | Radon is a problem in Clackamas County |
| Clatsop | Zone Two (Mid) | 3.5 | Radon is a problem in Clatsop County |
| Columbia | Zone Two (Mid) | 3.8 | Radon is a problem in Columbia County |
| Coos | Zone Three (Low) | 1.4 | Radon is a minor problem in Coos County |
| Crook | Zone Two (Mid) | 0.7 | Radon is a problem in Crook County |
| Curry | Zone Three (Low) | 1.0 | Radon is a minor problem in Curry County |
| Deschutes | Zone Three (Low) | 1.3 | Radon is a minor problem in Deschutes County |
| Douglas | Zone Three (Low) | 1.0 | Radon is a minor problem in Douglas County |
| Gilliam | Zone Two (Mid) | 3.1 | Radon is a problem in Gilliam County |
| Grant | Zone Two (Mid) | 2.3 | Radon is a problem in Grant County |
| Harney | Zone Two (Mid) | 2.3 | Radon is a problem in Harney County |
| Hood River | Zone Two (Mid) | 4.1 | Radon is a major problem in Hood River County |
| Jackson | Zone Three (Low) | 1.1 | Radon is a minor problem in Jackson County |
| Jefferson | Zone Two (Mid) | 1.2 | Radon is a problem in Jefferson County |
| Josephine | Zone Three (Low) | 1.0 | Radon is a minor problem in Josephine County |
| Klamath | Zone Two (Mid) | 0.6 | Radon is a problem in Klamath County |
| Lake | Zone Two (Mid) | 1.6 | Radon is a problem in Lake County |
| Lane | Zone Three (Low) | 1.6 | Radon is a minor problem in Lane County |
| Lincoln | Zone Three (Low) | 1.2 | Radon is a minor problem in Lincoln County |
| Linn | Zone Three (Low) | 1.3 | Radon is a minor problem in Linn County |
| Malheur | Zone Two (Mid) | 1.8 | Radon is a problem in Malheur County |
| Marion | Zone Three (Low) | 2.9 | Radon is a problem in Marion County |
| Morrow | Zone Two (Mid) | 1.2 | Radon is a problem in Morrow County |
| Multnomah | Zone Two (Mid) | 3.7 | Radon is a problem in Multnomah County |
| Polk | Zone Three (Low) | 4.6 | Radon is a major problem in Polk County |
| Sherman | Zone Two (Mid) | 9.3 | Radon is an extreme problem in Sherman County |
| Tillamook | Zone Three (Low) | 2.4 | Radon is a problem in Tillamook County |
| Umatilla | Zone Two (Mid) | 3.3 | Radon is a problem in Umatilla County |
| Union | Zone Two (Mid) | 3.7 | Radon is a problem in Union County |
| Wallowa | Zone Three (Low) | 2.2 | Radon is a problem in Wallowa County |
| Wasco | Zone Two (Mid) | 1.9 | Radon is a problem in Wasco County |
| Washington | Zone Two (Mid) | 1.9 | Radon is a problem in Washington County |
| Wheeler | Zone Two (Mid) | 0.8 | Radon is a problem in Wheeler County |
| Yamhill | Zone Two (Mid) | 2.6 | Radon is a problem in Yamhill County |
Is Radon a Problem in Pennsylvania?
| County Name | EPA Zone Designation (1=High, 2=Mid, 3=Low) | Average Radon Level (pCi/L) | Is Radon a Problem in this County? |
|---|---|---|---|
| Adams | Zone One (High) | 7.1 | Radon is a major problem in Adams County |
| Allegheny | Zone One (High) | 6.4 | Radon is a major problem in Allegheny County |
| Armstrong | Zone One (High) | 9.0 | Radon is an extreme problem in Armstrong County |
| Beaver | Zone One (High) | 9.0 | Radon is an extreme problem in Beaver County |
| Bedford | Zone One (High) | 9.8 | Radon is an extreme problem in Bedford County |
| Berks | Zone One (High) | 10.2 | Radon is an extreme problem in Berks County |
| Blair | Zone One (High) | 6.3 | Radon is a major problem in Blair County |
| Bradford | Zone One (High) | 7.3 | Radon is a major problem in Bradford County |
| Bucks | Zone One (High) | 5.3 | Radon is a major problem in Bucks County |
| Butler | Zone One (High) | 8.9 | Radon is an extreme problem in Butler County |
| Cambria | Zone Two (Mid) | 6.7 | Radon is a major problem in Cambria County |
| Cameron | Zone One (High) | 9.2 | Radon is an extreme problem in Cameron County |
| Carbon | Zone One (High) | 10.7 | Radon is an extreme problem in Carbon County |
| Centre | Zone One (High) | 11.5 | Radon is an extreme problem in Centre County |
| Chester | Zone One (High) | 6.9 | Radon is a major problem in Chester County |
| Clarion | Zone One (High) | 9.1 | Radon is an extreme problem in Clarion County |
| Clearfield | Zone One (High) | 9.0 | Radon is an extreme problem in Clearfield County |
| Clinton | Zone One (High) | 8.3 | Radon is an extreme problem in Clinton County |
| Columbia | Zone One (High) | 17.5 | Radon is an extreme problem in Columbia County |
| Crawford | Zone Two (Mid) | 5.1 | Radon is a major problem in Crawford County |
| Cumberland | Zone One (High) | 10.7 | Radon is an extreme problem in Cumberland County |
| Dauphin | Zone One (High) | 12.9 | Radon is an extreme problem in Dauphin County |
| Delaware | Zone One (High) | 3.9 | Radon is a major problem in Delaware County |
| Elk | Zone Two (Mid) | 7.5 | Radon is a major problem in Elk County |
| Erie | Zone Two (Mid) | 4.6 | Radon is a major problem in Erie County |
| Fayette | Zone Two (Mid) | 4.1 | Radon is a major problem in Fayette County |
| Forest | Zone One (High) | 11.1 | Radon is an extreme problem in Forest County |
| Franklin | Zone One (High) | 9.6 | Radon is an extreme problem in Franklin County |
| Fulton | Zone One (High) | 14.4 | Radon is an extreme problem in Fulton County |
| Greene | Zone Two (Mid) | 8.2 | Radon is an extreme problem in Greene County |
| Huntingdon | Zone One (High) | 10.1 | Radon is an extreme problem in Huntingdon County |
| Indiana | Zone One (High) | 5.9 | Radon is a major problem in Indiana County |
| Jefferson | Zone Two (Mid) | 10.5 | Radon is an extreme problem in Jefferson County |
| Juniata | Zone One (High) | 12.1 | Radon is an extreme problem in Juniata County |
| Lackawanna | Zone One (High) | 4.1 | Radon is a major problem in Lackawanna County |
| Lancaster | Zone One (High) | 12.4 | Radon is an extreme problem in Lancaster County |
| Lawrence | Zone Two (Mid) | 4.4 | Radon is a major problem in Lawrence County |
| Lebanon | Zone One (High) | 13.6 | Radon is an extreme problem in Lebanon County |
| Lehigh | Zone One (High) | 10.5 | Radon is an extreme problem in Lehigh County |
| Luzerne | Zone One (High) | 4.7 | Radon is a major problem in Luzerne County |
| Lycoming | Zone One (High) | 12.8 | Radon is an extreme problem in Lycoming County |
| McKean | Zone Two (Mid) | 14.5 | Radon is an extreme problem in McKean County |
| Mercer | Zone Two (Mid) | 3.7 | Radon is a problem in Mercer County |
| Mifflin | Zone One (High) | 11.2 | Radon is an extreme problem in Mifflin County |
| Monroe | Zone One (High) | 7.9 | Radon is a major problem in Monroe County |
| Montgomery | Zone One (High) | 4.3 | Radon is a major problem in Montgomery County |
| Montour | Zone One (High) | 14.5 | Radon is an extreme problem in Montour County |
| Northampton | Zone One (High) | 8.7 | Radon is an extreme problem in Northampton County |
| Northumberland | Zone One (High) | 12.9 | Radon is an extreme problem in Northumberland County |
| Perry | Zone One (High) | 15.4 | Radon is an extreme problem in Perry County |
| Philadelphia | Zone Three (Low) | 2.8 | Radon is a problem in Philadelphia County |
| Pike | Zone Two (Mid) | 5.2 | Radon is a major problem in Pike County |
| Potter | Zone Two (Mid) | 20.5 | Radon is an extreme problem in Potter County |
| Schuylkill | Zone One (High) | 12.4 | Radon is an extreme problem in Schuylkill County |
| Snyder | Zone One (High) | 12.4 | Radon is an extreme problem in Snyder County |
| Somerset | Zone Two (Mid) | 9.8 | Radon is an extreme problem in Somerset County |
| Sullivan | Zone One (High) | 5.4 | Radon is a major problem in Sullivan County |
| Susquehanna | Zone One (High) | 5.0 | Radon is a major problem in Susquehanna County |
| Tioga | Zone One (High) | 5.1 | Radon is a major problem in Tioga County |
| Union | Zone One (High) | 10.7 | Radon is an extreme problem in Union County |
| Venango | Zone One (High) | 10.3 | Radon is an extreme problem in Venango County |
| Warren | Zone Two (Mid) | 9.6 | Radon is an extreme problem in Warren County |
| Washington | Zone Two (Mid) | 5.7 | Radon is a major problem in Washington County |
| Wayne | Zone Two (Mid) | 3.4 | Radon is a problem in Wayne County |
| Westmoreland | Zone One (High) | 6.2 | Radon is a major problem in Westmoreland County |
| Wyoming | Zone One (High) | 5.5 | Radon is a major problem in Wyoming County |
| York | Zone One (High) | 11.1 | Radon is an extreme problem in York County |
Is Radon a Problem in Rhode Island?
| County Name | EPA Zone Designation (1=High, 2=Mid, 3=Low) | Average Radon Level (pCi/L) | Is Radon a Problem in this County? |
|---|---|---|---|
| Bristol | Zone Three (Low) | 1.8 | Radon is a minor problem in Bristol County |
| Kent | Zone One (High) | 3.2 | Radon is a major problem in Kent County |
| Newport | Zone Two (Mid) | 3.4 | Radon is a problem in Newport County |
| Providence | Zone Two (Mid) | 2.3 | Radon is a problem in Providence County |
| Washington | Zone One (High) | 4.7 | Radon is a major problem in Washington County |
Is Radon a Problem in South Carolina?
| County Name | EPA Zone Designation (1=High, 2=Mid, 3=Low) | Average Radon Level (pCi/L) | Is Radon a Problem in this County? |
|---|---|---|---|
| Abbeville | Zone Two (Mid) | 1.9 | Radon is a problem in Abbeville County |
| Aiken | Zone Three (Low) | 2.1 | Radon is a problem in Aiken County |
| Allendale | Zone Three (Low) | 0.5 | Radon is a minor problem in Allendale County |
| Anderson | Zone Two (Mid) | 1.8 | Radon is a problem in Anderson County |
| Bamberg | Zone Three (Low) | 1.6 | Radon is a minor problem in Bamberg County |
| Barnwell | Zone Three (Low) | 1.0 | Radon is a minor problem in Barnwell County |
| Beaufort | Zone Three (Low) | 0.8 | Radon is a minor problem in Beaufort County |
| Berkeley | Zone Three (Low) | 1.0 | Radon is a minor problem in Berkeley County |
| Calhoun | Zone Three (Low) | 0.9 | Radon is a minor problem in Calhoun County |
| Charleston | Zone Three (Low) | 0.8 | Radon is a minor problem in Charleston County |
| Cherokee | Zone Two (Mid) | 2.6 | Radon is a problem in Cherokee County |
| Chester | Zone Three (Low) | 1.1 | Radon is a minor problem in Chester County |
| Chesterfield | Zone Three (Low) | 1.1 | Radon is a minor problem in Chesterfield County |
| Clarendon | Zone Three (Low) | 1.1 | Radon is a minor problem in Clarendon County |
| Colleton | Zone Three (Low) | 0.4 | Radon is a minor problem in Colleton County |
| Darlington | Zone Three (Low) | 0.7 | Radon is a minor problem in Darlington County |
| Dillon | Zone Three (Low) | 0.3 | Radon is a minor problem in Dillon County |
| Dorchester | Zone Three (Low) | 1.0 | Radon is a minor problem in Dorchester County |
| Edgefield | Zone Three (Low) | 1.5 | Radon is a minor problem in Edgefield County |
| Fairfield | Zone Three (Low) | 2.1 | Radon is a problem in Fairfield County |
| Florence | Zone Three (Low) | 0.6 | Radon is a minor problem in Florence County |
| Georgetown | Zone Three (Low) | 0.4 | Radon is a minor problem in Georgetown County |
| Greenville | Zone One (High) | 3.1 | Radon is a major problem in Greenville County |
| Greenwood | Zone Three (Low) | 1.5 | Radon is a minor problem in Greenwood County |
| Hampton | Zone Three (Low) | 0.7 | Radon is a minor problem in Hampton County |
| Horry | Zone Three (Low) | 0.5 | Radon is a minor problem in Horry County |
| Jasper | Zone Three (Low) | 0.2 | Radon is a minor problem in Jasper County |
| Kershaw | Zone Three (Low) | 0.9 | Radon is a minor problem in Kershaw County |
| Lancaster | Zone Three (Low) | 2.2 | Radon is a problem in Lancaster County |
| Laurens | Zone Two (Mid) | 2.2 | Radon is a problem in Laurens County |
| Lee | Zone Three (Low) | 0.6 | Radon is a minor problem in Lee County |
| Lexington | Zone Three (Low) | 1.7 | Radon is a minor problem in Lexington County |
| McCormick | Zone Three (Low) | 2.2 | Radon is a problem in McCormick County |
| Marion | Zone Three (Low) | 0.7 | Radon is a minor problem in Marion County |
| Marlboro | Zone Three (Low) | 0.5 | Radon is a minor problem in Marlboro County |
| Newberry | Zone Three (Low) | 0.9 | Radon is a minor problem in Newberry County |
| Oconee | Zone Two (Mid) | 4.0 | Radon is a major problem in Oconee County |
| Orangeburg | Zone Three (Low) | 0.9 | Radon is a minor problem in Orangeburg County |
| Pickens | Zone Two (Mid) | 2.8 | Radon is a problem in Pickens County |
| Richland | Zone Three (Low) | 1.1 | Radon is a minor problem in Richland County |
| Saluda | Zone Three (Low) | 0.6 | Radon is a minor problem in Saluda County |
| Spartanburg | Zone Two (Mid) | 2.5 | Radon is a problem in Spartanburg County |
| Sumter | Zone Three (Low) | 0.7 | Radon is a minor problem in Sumter County |
| Union | Zone Three (Low) | 1.8 | Radon is a minor problem in Union County |
| Williamsburg | Zone Three (Low) | 1.5 | Radon is a minor problem in Williamsburg County |
| York | Zone Two (Mid) | 1.6 | Radon is a problem in York County |
Is Radon a Problem in South Dakota?
| County Name | EPA Zone Designation (1=High, 2=Mid, 3=Low) | Average Radon Level (pCi/L) | Is Radon a Problem in this County? |
|---|---|---|---|
| Aurora | Zone One (High) | 3.5 | Radon is a major problem in Aurora County |
| Beadle | Zone One (High) | 5.0 | Radon is a major problem in Beadle County |
| Bennett | Zone Two (Mid) | 5.8 | Radon is a major problem in Bennett County |
| Bon Homme | Zone One (High) | 7.6 | Radon is a major problem in Bon Homme County |
| Brookings | Zone One (High) | 6.8 | Radon is a major problem in Brookings County |
| Brown | Zone One (High) | 5.7 | Radon is a major problem in Brown County |
| Brule | Zone One (High) | 9.4 | Radon is an extreme problem in Brule County |
| Buffalo | Zone One (High) | 3.7 | Radon is a major problem in Buffalo County |
| Butte | Zone Two (Mid) | 9.5 | Radon is an extreme problem in Butte County |
| Campbell | Zone One (High) | 7.0 | Radon is a major problem in Campbell County |
| Charles Mix | Zone One (High) | 9.3 | Radon is an extreme problem in Charles Mix County |
| Clark | Zone One (High) | 5.3 | Radon is a major problem in Clark County |
| Clay | Zone One (High) | 6.1 | Radon is a major problem in Clay County |
| Codington | Zone One (High) | 7.4 | Radon is a major problem in Codington County |
| Corson | Zone One (High) | 6.5 | Radon is a major problem in Corson County |
| Custer | Zone Two (Mid) | 24.3 | Radon is an extreme problem in Custer County |
| Davison | Zone One (High) | 5.7 | Radon is a major problem in Davison County |
| Day | Zone One (High) | 6.0 | Radon is a major problem in Day County |
| Deuel | Zone One (High) | 9.2 | Radon is an extreme problem in Deuel County |
| Dewey | Zone Two (Mid) | 5.8 | Radon is a major problem in Dewey County |
| Douglas | Zone One (High) | 7.4 | Radon is a major problem in Douglas County |
| Edmunds | Zone One (High) | 5.7 | Radon is a major problem in Edmunds County |
| Fall River | Zone Two (Mid) | 5.5 | Radon is a major problem in Fall River County |
| Faulk | Zone One (High) | 8.9 | Radon is an extreme problem in Faulk County |
| Grant | Zone One (High) | 7.4 | Radon is a major problem in Grant County |
| Gregory | Zone Two (Mid) | 5.8 | Radon is a major problem in Gregory County |
| Haakon | Zone Two (Mid) | 8.6 | Radon is an extreme problem in Haakon County |
| Hamlin | Zone One (High) | 7.2 | Radon is a major problem in Hamlin County |
| Hand | Zone One (High) | 4.6 | Radon is a major problem in Hand County |
| Hanson | Zone One (High) | 5.9 | Radon is a major problem in Hanson County |
| Harding | Zone Two (Mid) | 6.6 | Radon is a major problem in Harding County |
| Hughes | Zone One (High) | 6.1 | Radon is a major problem in Hughes County |
| Hutchinson | Zone One (High) | 7.7 | Radon is a major problem in Hutchinson County |
| Hyde | Zone One (High) | 3.3 | Radon is a major problem in Hyde County |
| Jackson | Zone Two (Mid) | 0.9 | Radon is a problem in Jackson County |
| Jerauld | Zone One (High) | 6.4 | Radon is a major problem in Jerauld County |
| Jones | Zone Two (Mid) | 19.4 | Radon is an extreme problem in Jones County |
| Kingsbury | Zone One (High) | 5.7 | Radon is a major problem in Kingsbury County |
| Lake | Zone One (High) | 10.6 | Radon is an extreme problem in Lake County |
| Lawrence | Zone Two (Mid) | 10.5 | Radon is an extreme problem in Lawrence County |
| Lincoln | Zone One (High) | 6.2 | Radon is a major problem in Lincoln County |
| Lyman | Zone One (High) | 9.0 | Radon is an extreme problem in Lyman County |
| McCook | Zone One (High) | 6.6 | Radon is a major problem in McCook County |
| McPherson | Zone One (High) | 8.1 | Radon is an extreme problem in McPherson County |
| Marshall | Zone One (High) | 7.6 | Radon is a major problem in Marshall County |
| Meade | Zone Two (Mid) | 6.7 | Radon is a major problem in Meade County |
| Mellette | Zone Two (Mid) | 2.7 | Radon is a problem in Mellette County |
| Miner | Zone One (High) | 10.6 | Radon is an extreme problem in Miner County |
| Minnehaha | Zone One (High) | 7.1 | Radon is a major problem in Minnehaha County |
| Moody | Zone One (High) | 7.2 | Radon is a major problem in Moody County |
| Pennington | Zone Two (Mid) | 16.0 | Radon is an extreme problem in Pennington County |
| Perkins | Zone One (High) | 5.9 | Radon is a major problem in Perkins County |
| Potter | Zone One (High) | 3.2 | Radon is a major problem in Potter County |
| Roberts | Zone One (High) | 5.3 | Radon is a major problem in Roberts County |
| Sanborn | Zone One (High) | 6.4 | Radon is a major problem in Sanborn County |
| Shannon | Zone Two (Mid) | 1.6 | Radon is a problem in Shannon County |
| Spink | Zone One (High) | 4.5 | Radon is a major problem in Spink County |
| Stanley | Zone One (High) | 4.3 | Radon is a major problem in Stanley County |
| Sully | Zone One (High) | 5.2 | Radon is a major problem in Sully County |
| Todd | Zone Two (Mid) | 1.3 | Radon is a problem in Todd County |
| Tripp | Zone Two (Mid) | 6.0 | Radon is a major problem in Tripp County |
| Turner | Zone One (High) | 11.1 | Radon is an extreme problem in Turner County |
| Union | Zone One (High) | 6.3 | Radon is a major problem in Union County |
| Walworth | Zone One (High) | 5.6 | Radon is a major problem in Walworth County |
| Yankton | Zone One (High) | 9.7 | Radon is an extreme problem in Yankton County |
| Ziebach | Zone Two (Mid) | 10.0 | Radon is an extreme problem in Ziebach County |
Is Radon a Problem in Tennessee?
| County Name | EPA Zone Designation (1=High, 2=Mid, 3=Low) | Average Radon Level (pCi/L) | Is Radon a Problem in this County? |
|---|---|---|---|
| Anderson | Zone One (High) | 8.3 | Radon is an extreme problem in Anderson County |
| Bedford | Zone One (High) | 2.7 | Radon is a major problem in Bedford County |
| Benton | Zone Two (Mid) | 1.9 | Radon is a problem in Benton County |
| Bledsoe | Zone Three (Low) | 2.5 | Radon is a problem in Bledsoe County |
| Blount | Zone One (High) | 4.6 | Radon is a major problem in Blount County |
| Bradley | Zone One (High) | 2.6 | Radon is a major problem in Bradley County |
| Campbell | Zone Three (Low) | 7.2 | Radon is a major problem in Campbell County |
| Cannon | Zone Two (Mid) | 2.6 | Radon is a problem in Cannon County |
| Carroll | Zone Three (Low) | 1.6 | Radon is a minor problem in Carroll County |
| Carter | Zone Two (Mid) | 4.5 | Radon is a major problem in Carter County |
| Cheatham | Zone Two (Mid) | 3.7 | Radon is a problem in Cheatham County |
| Chester | Zone Two (Mid) | 1.0 | Radon is a problem in Chester County |
| Claiborne | Zone One (High) | 6.4 | Radon is a major problem in Claiborne County |
| Clay | Zone Two (Mid) | 3.9 | Radon is a problem in Clay County |
| Cocke | Zone Two (Mid) | 4.4 | Radon is a major problem in Cocke County |
| Coffee | Zone Two (Mid) | 4.4 | Radon is a major problem in Coffee County |
| Crockett | Zone Three (Low) | 1.0 | Radon is a minor problem in Crockett County |
| Cumberland | Zone Three (Low) | 1.5 | Radon is a minor problem in Cumberland County |
| Davidson | Zone One (High) | 5.3 | Radon is a major problem in Davidson County |
| Decatur | Zone Two (Mid) | 2.3 | Radon is a problem in Decatur County |
| DeKalb | Zone Two (Mid) | 3.4 | Radon is a problem in DeKalb County |
| Dickson | Zone Two (Mid) | 3.7 | Radon is a problem in Dickson County |
| Dyer | Zone Three (Low) | 1.4 | Radon is a minor problem in Dyer County |
| Fayette | Zone Three (Low) | 1.8 | Radon is a minor problem in Fayette County |
| Fentress | Zone Two (Mid) | 2.2 | Radon is a problem in Fentress County |
| Franklin | Zone Three (Low) | 4.0 | Radon is a major problem in Franklin County |
| Gibson | Zone Three (Low) | 1.7 | Radon is a minor problem in Gibson County |
| Giles | Zone One (High) | 5.5 | Radon is a major problem in Giles County |
| Grainger | Zone One (High) | 3.5 | Radon is a major problem in Grainger County |
| Greene | Zone One (High) | 4.5 | Radon is a major problem in Greene County |
| Grundy | Zone Three (Low) | 1.5 | Radon is a minor problem in Grundy County |
| Hamblen | Zone One (High) | 5.8 | Radon is a major problem in Hamblen County |
| Hamilton | Zone Two (Mid) | 2.7 | Radon is a problem in Hamilton County |
| Hancock | Zone One (High) | 2.7 | Radon is a major problem in Hancock County |
| Hardeman | Zone Three (Low) | 1.3 | Radon is a minor problem in Hardeman County |
| Hardin | Zone Two (Mid) | 1.4 | Radon is a problem in Hardin County |
| Hawkins | Zone One (High) | 4.6 | Radon is a major problem in Hawkins County |
| Haywood | Zone Three (Low) | 0.7 | Radon is a minor problem in Haywood County |
| Henderson | Zone Two (Mid) | 2.5 | Radon is a problem in Henderson County |
| Henry | Zone Three (Low) | 2.0 | Radon is a problem in Henry County |
| Hickman | Zone One (High) | 3.6 | Radon is a major problem in Hickman County |
| Houston | Zone Two (Mid) | 4.1 | Radon is a major problem in Houston County |
| Humphreys | Zone One (High) | 2.9 | Radon is a major problem in Humphreys County |
| Jackson | Zone One (High) | 8.8 | Radon is an extreme problem in Jackson County |
| Jefferson | Zone One (High) | 6.0 | Radon is a major problem in Jefferson County |
| Johnson | Zone Two (Mid) | 4.3 | Radon is a major problem in Johnson County |
| Knox | Zone One (High) | 4.1 | Radon is a major problem in Knox County |
| Lake | Zone Three (Low) | 0.6 | Radon is a minor problem in Lake County |
| Lauderdale | Zone Three (Low) | 1.1 | Radon is a minor problem in Lauderdale County |
| Lawrence | Zone One (High) | 3.5 | Radon is a major problem in Lawrence County |
| Lewis | Zone One (High) | 3.0 | Radon is a major problem in Lewis County |
| Lincoln | Zone One (High) | 2.9 | Radon is a major problem in Lincoln County |
| Loudon | Zone One (High) | 6.5 | Radon is a major problem in Loudon County |
| McMinn | Zone One (High) | 3.7 | Radon is a major problem in McMinn County |
| McNairy | Zone Two (Mid) | 1.1 | Radon is a minor problem in McNairy County |
| Macon | Zone Two (Mid) | 2.6 | Radon is a problem in Macon County |
| Madison | Zone Three (Low) | 1.7 | Radon is a minor problem in Madison County |
| Marion | Zone Three (Low) | 3.3 | Radon is a problem in Marion County |
| Marshall | Zone One (High) | 2.9 | Radon is a major problem in Marshall County |
| Maury | Zone One (High) | 4.0 | Radon is a major problem in Maury County |
| Meigs | Zone One (High) | 2.9 | Radon is a major problem in Meigs County |
| Monroe | Zone One (High) | 5.0 | Radon is a major problem in Monroe County |
| Montgomery | Zone Two (Mid) | 4.8 | Radon is a major problem in Montgomery County |
| Moore | Zone One (High) | 3.6 | Radon is a major problem in Moore County |
| Morgan | Zone Three (Low) | 5.0 | Radon is a major problem in Morgan County |
| Obion | Zone Three (Low) | 1.8 | Radon is a minor problem in Obion County |
| Overton | Zone Two (Mid) | 7.9 | Radon is a major problem in Overton County |
| Perry | Zone One (High) | 6.5 | Radon is a major problem in Perry County |
| Pickett | Zone Two (Mid) | 3.9 | Radon is a problem in Pickett County |
| Polk | Zone Two (Mid) | 3.7 | Radon is a problem in Polk County |
| Putnam | Zone Two (Mid) | 4.5 | Radon is a major problem in Putnam County |
| Rhea | Zone Three (Low) | 3.3 | Radon is a problem in Rhea County |
| Roane | Zone One (High) | 4.4 | Radon is a major problem in Roane County |
| Robertson | Zone Two (Mid) | 3.7 | Radon is a problem in Robertson County |
| Rutherford | Zone One (High) | 2.6 | Radon is a major problem in Rutherford County |
| Scott | Zone Three (Low) | 2.3 | Radon is a problem in Scott County |
| Sequatchie | Zone Three (Low) | 2.3 | Radon is a problem in Sequatchie County |
| Sevier | Zone Two (Mid) | 4.7 | Radon is a major problem in Sevier County |
| Shelby | Zone Three (Low) | 1.4 | Radon is a minor problem in Shelby County |
| Smith | Zone One (High) | 5.0 | Radon is a major problem in Smith County |
| Stewart | Zone Two (Mid) | 3.2 | Radon is a problem in Stewart County |
| Sullivan | Zone One (High) | 5.8 | Radon is a major problem in Sullivan County |
| Sumner | Zone Two (Mid) | 3.7 | Radon is a problem in Sumner County |
| Tipton | Zone Three (Low) | 1.7 | Radon is a minor problem in Tipton County |
| Trousdale | Zone One (High) | 3.8 | Radon is a major problem in Trousdale County |
| Unicoi | Zone Two (Mid) | 5.7 | Radon is a major problem in Unicoi County |
| Union | Zone One (High) | 3.6 | Radon is a major problem in Union County |
| Van Buren | Zone Two (Mid) | 5.1 | Radon is a major problem in Van Buren County |
| Warren | Zone Two (Mid) | 7.6 | Radon is a major problem in Warren County |
| Washington | Zone One (High) | 5.3 | Radon is a major problem in Washington County |
| Wayne | Zone One (High) | 2.9 | Radon is a major problem in Wayne County |
| Weakley | Zone Three (Low) | 1.4 | Radon is a minor problem in Weakley County |
| White | Zone Two (Mid) | 6.6 | Radon is a major problem in White County |
| Williamson | Zone One (High) | 3.6 | Radon is a major problem in Williamson County |
| Wilson | Zone One (High) | 2.5 | Radon is a major problem in Wilson County |
Is Radon a Problem in Texas?
| County Name | EPA Zone Designation (1=High, 2=Mid, 3=Low) | Average Radon Level (pCi/L) | Is Radon a Problem in this County? |
|---|---|---|---|
| Anderson | Zone Three (Low) | 0.5 | Radon is a minor problem in Anderson County |
| Andrews | Zone Three (Low) | 0.8 | Radon is a minor problem in Andrews County |
| Angelina | Zone Three (Low) | 0.1 | Radon is a minor problem in Angelina County |
| Aransas | Zone Three (Low) | 1.0 | Radon is a minor problem in Aransas County |
| Archer | Zone Three (Low) | 2.1 | Radon is a problem in Archer County |
| Armstrong | Zone Two (Mid) | 6.7 | Radon is a major problem in Armstrong County |
| Atascosa | Zone Three (Low) | 1.9 | Radon is a minor problem in Atascosa County |
| Austin | Zone Three (Low) | 0.3 | Radon is a minor problem in Austin County |
| Bailey | Zone Two (Mid) | 2.9 | Radon is a problem in Bailey County |
| Bandera | Zone Three (Low) | No Data | Radon is a minor problem in Bandera County |
| Bastrop | Zone Three (Low) | 11.3 | Radon is an extreme problem in Bastrop County |
| Baylor | Zone Three (Low) | 2.3 | Radon is a problem in Baylor County |
| Bee | Zone Three (Low) | 0.4 | Radon is a minor problem in Bee County |
| Bell | Zone Three (Low) | 1.9 | Radon is a minor problem in Bell County |
| Bexar | Zone Three (Low) | 0.7 | Radon is a minor problem in Bexar County |
| Blanco | Zone Three (Low) | No Data | Radon is a minor problem in Blanco County |
| Borden | Zone Three (Low) | No Data | Radon is a minor problem in Borden County |
| Bosque | Zone Three (Low) | 0.6 | Radon is a minor problem in Bosque County |
| Bowie | Zone Three (Low) | 0.5 | Radon is a minor problem in Bowie County |
| Brazoria | Zone Three (Low) | 0.4 | Radon is a minor problem in Brazoria County |
| Brazos | Zone Three (Low) | 0.2 | Radon is a minor problem in Brazos County |
| Brewster | Zone Two (Mid) | 5.6 | Radon is a major problem in Brewster County |
| Briscoe | Zone Three (Low) | No Data | Radon is a minor problem in Briscoe County |
| Brooks | Zone Three (Low) | No Data | Radon is a minor problem in Brooks County |
| Brown | Zone Three (Low) | 3.0 | Radon is a problem in Brown County |
| Burleson | Zone Three (Low) | 0.3 | Radon is a minor problem in Burleson County |
| Burnet | Zone Three (Low) | 1.6 | Radon is a minor problem in Burnet County |
| Caldwell | Zone Three (Low) | 1.0 | Radon is a minor problem in Caldwell County |
| Calhoun | Zone Three (Low) | 0.5 | Radon is a minor problem in Calhoun County |
| Callahan | Zone Three (Low) | No Data | Radon is a minor problem in Callahan County |
| Cameron | Zone Three (Low) | 1.6 | Radon is a minor problem in Cameron County |
| Camp | Zone Three (Low) | No Data | Radon is a minor problem in Camp County |
| Carson | Zone Two (Mid) | 4.7 | Radon is a major problem in Carson County |
| Cass | Zone Three (Low) | No Data | Radon is a minor problem in Cass County |
| Castro | Zone Two (Mid) | 7.7 | Radon is a major problem in Castro County |
| Chambers | Zone Three (Low) | No Data | Radon is a minor problem in Chambers County |
| Cherokee | Zone Three (Low) | No Data | Radon is a minor problem in Cherokee County |
| Childress | Zone Three (Low) | 4.5 | Radon is a major problem in Childress County |
| Clay | Zone Three (Low) | 1.0 | Radon is a minor problem in Clay County |
| Cochran | Zone Three (Low) | No Data | Radon is a minor problem in Cochran County |
| Coke | Zone Three (Low) | No Data | Radon is a minor problem in Coke County |
| Coleman | Zone Three (Low) | 1.5 | Radon is a minor problem in Coleman County |
| Collin | Zone Three (Low) | 1.6 | Radon is a minor problem in Collin County |
| Collingsworth | Zone Three (Low) | 1.6 | Radon is a minor problem in Collingsworth County |
| Colorado | Zone Three (Low) | 0.8 | Radon is a minor problem in Colorado County |
| Comal | Zone Three (Low) | 1.7 | Radon is a minor problem in Comal County |
| Comanche | Zone Three (Low) | No Data | Radon is a minor problem in Comanche County |
| Concho | Zone Three (Low) | No Data | Radon is a minor problem in Concho County |
| Cooke | Zone Three (Low) | 1.5 | Radon is a minor problem in Cooke County |
| Coryell | Zone Three (Low) | No Data | Radon is a minor problem in Coryell County |
| Cottle | Zone Three (Low) | 0.9 | Radon is a minor problem in Cottle County |
| Crane | Zone Three (Low) | No Data | Radon is a minor problem in Crane County |
| Crockett | Zone Three (Low) | 2.5 | Radon is a problem in Crockett County |
| Crosby | Zone Two (Mid) | 2.9 | Radon is a problem in Crosby County |
| Culberson | Zone Two (Mid) | 3.2 | Radon is a problem in Culberson County |
| Dallam | Zone Two (Mid) | 2.0 | Radon is a problem in Dallam County |
| Dallas | Zone Three (Low) | 2.5 | Radon is a problem in Dallas County |
| Dawson | Zone Three (Low) | 2.8 | Radon is a problem in Dawson County |
| Deaf Smith | Zone Two (Mid) | 6.2 | Radon is a major problem in Deaf Smith County |
| Delta | Zone Three (Low) | No Data | Radon is a minor problem in Delta County |
| Denton | Zone Three (Low) | 2.6 | Radon is a problem in Denton County |
| DeWitt | Zone Three (Low) | 1.2 | Radon is a minor problem in DeWitt County |
| Dickens | Zone Three (Low) | No Data | Radon is a minor problem in Dickens County |
| Dimmit | Zone Three (Low) | 0.9 | Radon is a minor problem in Dimmit County |
| Donley | Zone Two (Mid) | 4.0 | Radon is a major problem in Donley County |
| Duval | Zone Three (Low) | No Data | Radon is a minor problem in Duval County |
| Eastland | Zone Three (Low) | 0.8 | Radon is a minor problem in Eastland County |
| Ector | Zone Three (Low) | 3.1 | Radon is a problem in Ector County |
| Edwards | Zone Three (Low) | No Data | Radon is a minor problem in Edwards County |
| Ellis | Zone Three (Low) | 65.2 | Radon is an extreme problem in Ellis County |
| El Paso | Zone Three (Low) | 7.5 | Radon is a major problem in El Paso County |
| Erath | Zone Three (Low) | 0.5 | Radon is a minor problem in Erath County |
| Falls | Zone Three (Low) | 0.8 | Radon is a minor problem in Falls County |
| Fannin | Zone Three (Low) | 0.3 | Radon is a minor problem in Fannin County |
| Fayette | Zone Three (Low) | 0.6 | Radon is a minor problem in Fayette County |
| Fisher | Zone Three (Low) | No Data | Radon is a minor problem in Fisher County |
| Floyd | Zone Two (Mid) | 3.4 | Radon is a problem in Floyd County |
| Foard | Zone Three (Low) | No Data | Radon is a minor problem in Foard County |
| Fort Bend | Zone Three (Low) | 0.8 | Radon is a minor problem in Fort Bend County |
| Franklin | Zone Three (Low) | 0.2 | Radon is a minor problem in Franklin County |
| Freestone | Zone Three (Low) | No Data | Radon is a minor problem in Freestone County |
| Frio | Zone Three (Low) | No Data | Radon is a minor problem in Frio County |
| Gaines | Zone Three (Low) | No Data | Radon is a minor problem in Gaines County |
| Galveston | Zone Three (Low) | 0.4 | Radon is a minor problem in Galveston County |
| Garza | Zone Two (Mid) | 3.5 | Radon is a problem in Garza County |
| Gillespie | Zone Three (Low) | 0.6 | Radon is a minor problem in Gillespie County |
| Glasscock | Zone Three (Low) | 0.9 | Radon is a minor problem in Glasscock County |
| Goliad | Zone Three (Low) | 0.7 | Radon is a minor problem in Goliad County |
| Gonzales | Zone Three (Low) | 0.5 | Radon is a minor problem in Gonzales County |
| Gray | Zone Two (Mid) | 6.4 | Radon is a major problem in Gray County |
| Grayson | Zone Three (Low) | 1.3 | Radon is a minor problem in Grayson County |
| Gregg | Zone Three (Low) | 1.2 | Radon is a minor problem in Gregg County |
| Grimes | Zone Three (Low) | 1.4 | Radon is a minor problem in Grimes County |
| Guadalupe | Zone Three (Low) | 1.8 | Radon is a minor problem in Guadalupe County |
| Hale | Zone Two (Mid) | 6.6 | Radon is a major problem in Hale County |
| Hall | Zone Three (Low) | No Data | Radon is a minor problem in Hall County |
| Hamilton | Zone Three (Low) | 0.1 | Radon is a minor problem in Hamilton County |
| Hansford | Zone Two (Mid) | 4.0 | Radon is a problem in Hansford County |
| Hardeman | Zone Three (Low) | 2.2 | Radon is a problem in Hardeman County |
| Hardin | Zone Three (Low) | No Data | Radon is a minor problem in Hardin County |
| Harris | Zone Three (Low) | 0.7 | Radon is a minor problem in Harris County |
| Harrison | Zone Three (Low) | 0.4 | Radon is a minor problem in Harrison County |
| Hartley | Zone Two (Mid) | No Data | Radon is a problem in Hartley County |
| Haskell | Zone Three (Low) | 0.7 | Radon is a minor problem in Haskell County |
| Hays | Zone Three (Low) | 1.0 | Radon is a minor problem in Hays County |
| Hemphill | Zone Two (Mid) | 1.2 | Radon is a problem in Hemphill County |
| Henderson | Zone Three (Low) | 1.5 | Radon is a minor problem in Henderson County |
| Hidalgo | Zone Three (Low) | 0.3 | Radon is a minor problem in Hidalgo County |
| Hill | Zone Three (Low) | 0.3 | Radon is a minor problem in Hill County |
| Hockley | Zone Two (Mid) | No Data | Radon is a problem in Hockley County |
| Hood | Zone Three (Low) | 0.6 | Radon is a minor problem in Hood County |
| Hopkins | Zone Three (Low) | 0.3 | Radon is a minor problem in Hopkins County |
| Houston | Zone Three (Low) | No Data | Radon is a minor problem in Houston County |
| Howard | Zone Three (Low) | 1.6 | Radon is a minor problem in Howard County |
| Hudspeth | Zone Two (Mid) | No Data | Radon is a problem in Hudspeth County |
| Hunt | Zone Three (Low) | 1.9 | Radon is a minor problem in Hunt County |
| Hutchinson | Zone Two (Mid) | 1.1 | Radon is a problem in Hutchinson County |
| Irion | Zone Three (Low) | No Data | Radon is a minor problem in Irion County |
| Jack | Zone Three (Low) | No Data | Radon is a minor problem in Jack County |
| Jackson | Zone Three (Low) | No Data | Radon is a minor problem in Jackson County |
| Jasper | Zone Three (Low) | No Data | Radon is a minor problem in Jasper County |
| Jeff Davis | Zone Two (Mid) | 7.5 | Radon is a major problem in Jeff Davis County |
| Jefferson | Zone Three (Low) | 0.3 | Radon is a minor problem in Jefferson County |
| Jim Hogg | Zone Three (Low) | No Data | Radon is a minor problem in Jim Hogg County |
| Jim Wells | Zone Three (Low) | No Data | Radon is a minor problem in Jim Wells County |
| Johnson | Zone Three (Low) | 0.4 | Radon is a minor problem in Johnson County |
| Jones | Zone Three (Low) | 2.6 | Radon is a problem in Jones County |
| Karnes | Zone Three (Low) | No Data | Radon is a minor problem in Karnes County |
| Kaufman | Zone Three (Low) | 1.4 | Radon is a minor problem in Kaufman County |
| Kendall | Zone Three (Low) | 0.9 | Radon is a minor problem in Kendall County |
| Kenedy | Zone Three (Low) | No Data | Radon is a minor problem in Kenedy County |
| Kent | Zone Three (Low) | No Data | Radon is a minor problem in Kent County |
| Kerr | Zone Three (Low) | 2.0 | Radon is a problem in Kerr County |
| Kimble | Zone Three (Low) | No Data | Radon is a minor problem in Kimble County |
| King | Zone Three (Low) | No Data | Radon is a minor problem in King County |
| Kinney | Zone Three (Low) | No Data | Radon is a minor problem in Kinney County |
| Kleberg | Zone Three (Low) | 0.5 | Radon is a minor problem in Kleberg County |
| Knox | Zone Three (Low) | No Data | Radon is a minor problem in Knox County |
| Lamar | Zone Three (Low) | 0.5 | Radon is a minor problem in Lamar County |
| Lamb | Zone Two (Mid) | No Data | Radon is a minor problem in Lamb County |
| Lampasas | Zone Three (Low) | No Data | Radon is a minor problem in Lampasas County |
| La Salle | Zone Three (Low) | No Data | Radon is a minor problem in La Salle County |
| Lavaca | Zone Three (Low) | 0.3 | Radon is a minor problem in Lavaca County |
| Lee | Zone Three (Low) | 0.8 | Radon is a minor problem in Lee County |
| Leon | Zone Three (Low) | 0.8 | Radon is a minor problem in Leon County |
| Liberty | Zone Three (Low) | 2.3 | Radon is a problem in Liberty County |
| Limestone | Zone Three (Low) | 0.2 | Radon is a minor problem in Limestone County |
| Lipscomb | Zone Two (Mid) | 7.6 | Radon is a major problem in Lipscomb County |
| Live Oak | Zone Three (Low) | No Data | Radon is a minor problem in Live Oak County |
| Llano | Zone Two (Mid) | 1.7 | Radon is a problem in Llano County |
| Loving | Zone Three (Low) | No Data | Radon is a minor problem in Loving County |
| Lubbock | Zone Two (Mid) | 3.3 | Radon is a problem in Lubbock County |
| Lynn | Zone Two (Mid) | No Data | Radon is a problem in Lynn County |
| McCulloch | Zone Three (Low) | 0.6 | Radon is a minor problem in McCulloch County |
| McLennan | Zone Three (Low) | 0.7 | Radon is a minor problem in McLennan County |
| McMullen | Zone Three (Low) | No Data | Radon is a minor problem in McMullen County |
| Madison | Zone Three (Low) | 1.5 | Radon is a minor problem in Madison County |
| Marion | Zone Three (Low) | No Data | Radon is a minor problem in Marion County |
| Martin | Zone Three (Low) | 1.7 | Radon is a minor problem in Martin County |
| Mason | Zone Two (Mid) | 1.4 | Radon is a problem in Mason County |
| Matagorda | Zone Three (Low) | 1.4 | Radon is a minor problem in Matagorda County |
| Maverick | Zone Three (Low) | No Data | Radon is a minor problem in Maverick County |
| Medina | Zone Three (Low) | 0.5 | Radon is a minor problem in Medina County |
| Menard | Zone Three (Low) | 0.9 | Radon is a minor problem in Menard County |
| Midland | Zone Three (Low) | 1.0 | Radon is a minor problem in Midland County |
| Milam | Zone Three (Low) | 1.6 | Radon is a minor problem in Milam County |
| Mills | Zone Three (Low) | No Data | Radon is a minor problem in Mills County |
| Mitchell | Zone Three (Low) | No Data | Radon is a minor problem in Mitchell County |
| Montague | Zone Three (Low) | 1.9 | Radon is a minor problem in Montague County |
| Montgomery | Zone Three (Low) | 1.3 | Radon is a minor problem in Montgomery County |
| Moore | Zone Two (Mid) | 3.0 | Radon is a problem in Moore County |
| Morris | Zone Three (Low) | 0.6 | Radon is a minor problem in Morris County |
| Motley | Zone Three (Low) | No Data | Radon is a minor problem in Motley County |
| Nacogdoches | Zone Three (Low) | 1.7 | Radon is a minor problem in Nacogdoches County |
| Navarro | Zone Three (Low) | 0.5 | Radon is a minor problem in Navarro County |
| Newton | Zone Three (Low) | 2.0 | Radon is a problem in Newton County |
| Nolan | Zone Three (Low) | 2.0 | Radon is a problem in Nolan County |
| Nueces | Zone Three (Low) | 0.5 | Radon is a minor problem in Nueces County |
| Ochiltree | Zone Two (Mid) | 7.7 | Radon is a major problem in Ochiltree County |
| Oldham | Zone Two (Mid) | 7.3 | Radon is a major problem in Oldham County |
| Orange | Zone Three (Low) | 0.4 | Radon is a minor problem in Orange County |
| Palo Pinto | Zone Three (Low) | No Data | Radon is a minor problem in Palo Pinto County |
| Panola | Zone Three (Low) | 0.4 | Radon is a minor problem in Panola County |
| Parker | Zone Three (Low) | 0.8 | Radon is a minor problem in Parker County |
| Parmer | Zone Two (Mid) | 9.4 | Radon is an extreme problem in Parmer County |
| Pecos | Zone Three (Low) | 0.9 | Radon is a minor problem in Pecos County |
| Polk | Zone Three (Low) | 0.1 | Radon is a minor problem in Polk County |
| Potter | Zone Two (Mid) | 3.8 | Radon is a problem in Potter County |
| Presidio | Zone Two (Mid) | 2.6 | Radon is a problem in Presidio County |
| Rains | Zone Three (Low) | 3.4 | Radon is a problem in Rains County |
| Randall | Zone Two (Mid) | 8.1 | Radon is an extreme problem in Randall County |
| Reagan | Zone Three (Low) | No Data | Radon is a minor problem in Reagan County |
| Real | Zone Three (Low) | 1.7 | Radon is a minor problem in Real County |
| Red River | Zone Three (Low) | No Data | Radon is a minor problem in Red River County |
| Reeves | Zone Two (Mid) | No Data | Radon is a problem in Reeves County |
| Refugio | Zone Three (Low) | No Data | Radon is a minor problem in Refugio County |
| Roberts | Zone Two (Mid) | 3.4 | Radon is a problem in Roberts County |
| Robertson | Zone Three (Low) | 0.4 | Radon is a minor problem in Robertson County |
| Rockwall | Zone Three (Low) | No Data | Radon is a minor problem in Rockwall County |
| Runnels | Zone Three (Low) | 0.4 | Radon is a minor problem in Runnels County |
| Rusk | Zone Three (Low) | 1.2 | Radon is a minor problem in Rusk County |
| Sabine | Zone Three (Low) | No Data | Radon is a minor problem in Sabine County |
| San Augustine | Zone Three (Low) | No Data | Radon is a minor problem in San Augustine County |
| San Jacinto | Zone Three (Low) | 2.5 | Radon is a problem in San Jacinto County |
| San Patricio | Zone Three (Low) | 0.6 | Radon is a minor problem in San Patricio County |
| San Saba | Zone Three (Low) | No Data | Radon is a minor problem in San Saba County |
| Schleicher | Zone Three (Low) | No Data | Radon is a minor problem in Schleicher County |
| Scurry | Zone Three (Low) | 5.6 | Radon is a major problem in Scurry County |
| Shackelford | Zone Three (Low) | No Data | Radon is a minor problem in Shackelford County |
| Shelby | Zone Three (Low) | No Data | Radon is a minor problem in Shelby County |
| Sherman | Zone Two (Mid) | 2.2 | Radon is a problem in Sherman County |
| Smith | Zone Three (Low) | 1.3 | Radon is a minor problem in Smith County |
| Somervell | Zone Three (Low) | No Data | Radon is a minor problem in Somervell County |
| Starr | Zone Three (Low) | 1.1 | Radon is a minor problem in Starr County |
| Stephens | Zone Three (Low) | 6.3 | Radon is a major problem in Stephens County |
| Sterling | Zone Three (Low) | No Data | Radon is a minor problem in Sterling County |
| Stonewall | Zone Three (Low) | No Data | Radon is a minor problem in Stonewall County |
| Sutton | Zone Three (Low) | No Data | Radon is a minor problem in Sutton County |
| Swisher | Zone Two (Mid) | 7.0 | Radon is a major problem in Swisher County |
| Tarrant | Zone Three (Low) | 1.5 | Radon is a minor problem in Tarrant County |
| Taylor | Zone Three (Low) | 1.3 | Radon is a minor problem in Taylor County |
| Terrell | Zone Two (Mid) | 1.0 | Radon is a problem in Terrell County |
| Terry | Zone Three (Low) | 1.9 | Radon is a minor problem in Terry County |
| Throckmorton | Zone Three (Low) | No Data | Radon is a minor problem in Throckmorton County |
| Titus | Zone Three (Low) | 0.3 | Radon is a minor problem in Titus County |
| Tom Green | Zone Three (Low) | 0.7 | Radon is a minor problem in Tom Green County |
| Travis | Zone Three (Low) | 2.8 | Radon is a problem in Travis County |
| Trinity | Zone Three (Low) | 0.6 | Radon is a minor problem in Trinity County |
| Tyler | Zone Three (Low) | 0.8 | Radon is a minor problem in Tyler County |
| Upshur | Zone Three (Low) | 1.2 | Radon is a minor problem in Upshur County |
| Upton | Zone Three (Low) | No Data | Radon is a minor problem in Upton County |
| Uvalde | Zone Three (Low) | No Data | Radon is a minor problem in Uvalde County |
| Val Verde | Zone Three (Low) | 1.6 | Radon is a minor problem in Val Verde County |
| Van Zandt | Zone Three (Low) | 0.4 | Radon is a minor problem in Van Zandt County |
| Victoria | Zone Three (Low) | 0.4 | Radon is a minor problem in Victoria County |
| Walker | Zone Three (Low) | 0.4 | Radon is a minor problem in Walker County |
| Waller | Zone Three (Low) | No Data | Radon is a minor problem in Waller County |
| Ward | Zone Three (Low) | 0.6 | Radon is a minor problem in Ward County |
| Washington | Zone Three (Low) | 1.1 | Radon is a minor problem in Washington County |
| Webb | Zone Three (Low) | 0.6 | Radon is a minor problem in Webb County |
| Wharton | Zone Three (Low) | No Data | Radon is a minor problem in Wharton County |
| Wheeler | Zone Three (Low) | 2.0 | Radon is a problem in Wheeler County |
| Wichita | Zone Three (Low) | 0.6 | Radon is a minor problem in Wichita County |
| Wilbarger | Zone Three (Low) | 2.4 | Radon is a problem in Wilbarger County |
| Willacy | Zone Three (Low) | 0.5 | Radon is a minor problem in Willacy County |
| Williamson | Zone Three (Low) | 1.8 | Radon is a minor problem in Williamson County |
| Wilson | Zone Three (Low) | No Data | Radon is a minor problem in Wilson County |
| Winkler | Zone Three (Low) | 0.6 | Radon is a minor problem in Winkler County |
| Wise | Zone Three (Low) | 0.6 | Radon is a minor problem in Wise County |
| Wood | Zone Three (Low) | 0.2 | Radon is a minor problem in Wood County |
| Yoakum | Zone Three (Low) | 1.3 | Radon is a minor problem in Yoakum County |
| Young | Zone Three (Low) | 1.3 | Radon is a minor problem in Young County |
| Zapata | Zone Three (Low) | No Data | Radon is a minor problem in Zapata County |
| Zavala | Zone Three (Low) | No Data | Radon is a minor problem in Zavala County |
Is Radon a Problem in Utah?
| County Name | EPA Zone Designation (1=High, 2=Mid, 3=Low) | Average Radon Level (pCi/L) | Is Radon a Problem in this County? |
|---|---|---|---|
| Beaver | Zone Two (Mid) | 26.2 | Radon is an extreme problem in Beaver County |
| Box Elder | Zone Two (Mid) | 5.5 | Radon is a major problem in Box Elder County |
| Cache | Zone Two (Mid) | 4.6 | Radon is a major problem in Cache County |
| Carbon | Zone One (High) | 3.4 | Radon is a major problem in Carbon County |
| Daggett | Zone Two (Mid) | 4.2 | Radon is a major problem in Daggett County |
| Davis | Zone Two (Mid) | 3.0 | Radon is a problem in Davis County |
| Duchesne | Zone One (High) | 2.9 | Radon is a major problem in Duchesne County |
| Emery | Zone Two (Mid) | 2.8 | Radon is a problem in Emery County |
| Garfield | Zone Two (Mid) | 4.4 | Radon is a major problem in Garfield County |
| Grand | Zone One (High) | 8.1 | Radon is an extreme problem in Grand County |
| Iron | Zone Two (Mid) | 1.6 | Radon is a problem in Iron County |
| Juab | Zone Two (Mid) | 6.4 | Radon is a major problem in Juab County |
| Kane | Zone Two (Mid) | 2.2 | Radon is a problem in Kane County |
| Millard | Zone Two (Mid) | 3.0 | Radon is a problem in Millard County |
| Morgan | Zone Two (Mid) | 3.6 | Radon is a problem in Morgan County |
| Piute | Zone One (High) | 2.1 | Radon is a major problem in Piute County |
| Rich | Zone Two (Mid) | 6.1 | Radon is a major problem in Rich County |
| Salt Lake | Zone Two (Mid) | 3.8 | Radon is a problem in Salt Lake County |
| San Juan | Zone Two (Mid) | 3.0 | Radon is a problem in San Juan County |
| Sanpete | Zone One (High) | 5.3 | Radon is a major problem in Sanpete County |
| Sevier | Zone One (High) | 6.9 | Radon is a major problem in Sevier County |
| Summit | Zone Two (Mid) | 3.3 | Radon is a problem in Summit County |
| Tooele | Zone Two (Mid) | 4.1 | Radon is a major problem in Tooele County |
| Uintah | Zone One (High) | 5.0 | Radon is a major problem in Uintah County |
| Utah | Zone Two (Mid) | 4.7 | Radon is a major problem in Utah County |
| Wasatch | Zone Two (Mid) | 5.7 | Radon is a major problem in Wasatch County |
| Washington | Zone Two (Mid) | 1.8 | Radon is a problem in Washington County |
| Wayne | Zone Two (Mid) | 4.3 | Radon is a major problem in Wayne County |
| Weber | Zone Two (Mid) | 4.7 | Radon is a major problem in Weber County |
Is Radon a Problem in Vermont?
| County Name | EPA Zone Designation (1=High, 2=Mid, 3=Low) | Average Radon Level (pCi/L) | Is Radon a Problem in this County? |
|---|---|---|---|
| Addison | Zone Two (Mid) | 4.3 | Radon is a major problem in COUNTY County |
| Bennington | Zone Two (Mid) | 4.2 | Radon is a major problem in Bennington County |
| Caledonia | Zone Two (Mid) | 3.0 | Radon is a problem in Caledonia County |
| Chittenden | Zone Three (Low) | 2.3 | Radon is a problem in Chittenden County |
| Essex | Zone Two (Mid) | 4.1 | Radon is a major problem in Essex County |
| Franklin | Zone Two (Mid) | 2.5 | Radon is a problem in Franklin County |
| Grand Isle | Zone Three (Low) | 4.7 | Radon is a major problem in Grand Isle County |
| Lamoille | Zone Two (Mid) | 3.7 | Radon is a problem in Lamoille County |
| Orange | Zone Two (Mid) | 3.9 | Radon is a problem in Orange County |
| Orleans | Zone Two (Mid) | 3.8 | Radon is a problem in Orleans County |
| Rutland | Zone Two (Mid) | 3.2 | Radon is a problem in Rutland County |
| Washington | Zone Two (Mid) | 3.5 | Radon is a problem in Washington County |
| Windham | Zone Two (Mid) | 3.2 | Radon is a problem in Windham County |
| Windsor | Zone Two (Mid) | 4.3 | Radon is a major problem in Windsor County |
Is Radon a Problem in Virginia?
| County Name | EPA Zone Designation (1=High, 2=Mid, 3=Low) | Average Radon Level (pCi/L) | Is Radon a Problem in this County? |
|---|---|---|---|
| Accomack | Zone Three (Low) | 0.4 | Radon is a minor problem in Accomack County |
| Albemarle | Zone Two (Mid) | 3.0 | Radon is a problem in Albemarle County |
| Alleghany | Zone One (High) | 1.2 | Radon is a major problem in Alleghany County |
| Amelia | Zone One (High) | 3.1 | Radon is a major problem in Amelia County |
| Amherst | Zone Two (Mid) | 3.0 | Radon is a problem in Amherst County |
| Appomattox | Zone One (High) | 2.4 | Radon is a major problem in Appomattox County |
| Arlington | Zone Two (Mid) | 2.5 | Radon is a problem in Arlington County |
| Augusta | Zone One (High) | 5.3 | Radon is a major problem in Augusta County |
| Bath | Zone One (High) | 4.5 | Radon is a major problem in Bath County |
| Bedford | Zone Two (Mid) | 2.4 | Radon is a problem in Bedford County |
| Bland | Zone One (High) | 3.8 | Radon is a major problem in Bland County |
| Botetourt | Zone One (High) | 4.2 | Radon is a major problem in Botetourt County |
| Brunswick | Zone One (High) | 4.3 | Radon is a major problem in Brunswick County |
| Buchanan | Zone Two (Mid) | 2.4 | Radon is a problem in Buchanan County |
| Buckingham | Zone One (High) | 4.7 | Radon is a major problem in Buckingham County |
| Campbell | Zone One (High) | 2.6 | Radon is a major problem in Campbell County |
| Caroline | Zone Three (Low) | 2.7 | Radon is a problem in Caroline County |
| Carroll | Zone Two (Mid) | 4.6 | Radon is a major problem in Carroll County |
| Charles City | Zone Three (Low) | 1.1 | Radon is a minor problem in Charles City County |
| Charlotte | Zone Two (Mid) | 3.4 | Radon is a problem in Charlotte County |
| Chesterfield | Zone Three (Low) | 3.3 | Radon is a problem in Chesterfield County |
| Clarke | Zone One (High) | 5.3 | Radon is a major problem in Clarke County |
| Craig | Zone One (High) | 4.1 | Radon is a major problem in Craig County |
| Culpeper | Zone Two (Mid) | 3.6 | Radon is a problem in Culpeper County |
| Cumberland | Zone One (High) | 3.0 | Radon is a major problem in Cumberland County |
| Dickenson | Zone Two (Mid) | 3.2 | Radon is a problem in Dickenson County |
| Dinwiddie | Zone One (High) | 3.4 | Radon is a major problem in Dinwiddie County |
| Essex | Zone Three (Low) | 2.3 | Radon is a problem in Essex County |
| Fairfax | Zone One (High) | 3.1 | Radon is a major problem in Fairfax County |
| Fauquier | Zone Two (Mid) | 2.9 | Radon is a problem in Fauquier County |
| Floyd | Zone Two (Mid) | 4.5 | Radon is a major problem in Floyd County |
| Fluvanna | Zone One (High) | 3.1 | Radon is a major problem in Fluvanna County |
| Franklin | Zone Two (Mid) | 2.6 | Radon is a problem in Franklin County |
| Frederick | Zone One (High) | 6.9 | Radon is a major problem in Frederick County |
| Giles | Zone One (High) | 6.5 | Radon is a major problem in Giles County |
| Gloucester | Zone Three (Low) | 1.9 | Radon is a minor problem in Gloucester County |
| Goochland | Zone One (High) | 3.1 | Radon is a major problem in Goochland County |
| Grayson | Zone Two (Mid) | 3.3 | Radon is a problem in Grayson County |
| Greene | Zone Two (Mid) | 2.5 | Radon is a problem in Greene County |
| Greensville | Zone Three (Low) | 3.0 | Radon is a problem in Greensville County |
| Halifax | Zone Two (Mid) | 2.4 | Radon is a problem in Halifax County |
| Hanover | Zone Three (Low) | 4.7 | Radon is a major problem in Hanover County |
| Henrico | Zone Three (Low) | 2.8 | Radon is a problem in Henrico County |
| Henry | Zone One (High) | 3.2 | Radon is a major problem in Henry County |
| Highland | Zone One (High) | 8.8 | Radon is an extreme problem in Highland County |
| Isle Of Wight | Zone Three (Low) | 0.5 | Radon is a minor problem in Isle Of Wight County |
| James City | Zone Three (Low) | 2.8 | Radon is a problem in James City County |
| King And Queen | Zone Three (Low) | 4.4 | Radon is a major problem in King And Queen County |
| King George | Zone Three (Low) | 3.5 | Radon is a problem in King George County |
| King William | Zone Three (Low) | 4.1 | Radon is a major problem in King William County |
| Lancaster | Zone Three (Low) | 1.7 | Radon is a minor problem in Lancaster County |
| Lee | Zone One (High) | 6.4 | Radon is a major problem in Lee County |
| Loudoun | Zone Two (Mid) | 3.8 | Radon is a problem in Loudoun County |
| Louisa | Zone One (High) | 3.7 | Radon is a major problem in Louisa County |
| Lunenburg | Zone Two (Mid) | 1.3 | Radon is a minor problem in Lunenburg County |
| Madison | Zone Two (Mid) | 6.5 | Radon is a major problem in Madison County |
| Mathews | Zone Three (Low) | 2.4 | Radon is a problem in Mathews County |
| Mecklenburg | Zone Two (Mid) | 3.3 | Radon is a problem in Mecklenburg County |
| Middlesex | Zone Three (Low) | 1.1 | Radon is a minor problem in Middlesex County |
| Montgomery | Zone One (High) | 3.8 | Radon is a major problem in Montgomery County |
| Nelson | Zone Two (Mid) | 3.2 | Radon is a problem in Nelson County |
| New Kent | Zone Three (Low) | 1.5 | Radon is a minor problem in New Kent County |
| Northampton | Zone Three (Low) | 0.8 | Radon is a minor problem in Northampton County |
| Northumberland | Zone Three (Low) | 2.9 | Radon is a problem in Northumberland County |
| Nottoway | Zone One (High) | 6.1 | Radon is a major problem in Nottoway County |
| Orange | Zone One (High) | 2.7 | Radon is a major problem in Orange County |
| Page | Zone One (High) | 3.6 | Radon is a major problem in Page County |
| Patrick | Zone One (High) | 3.4 | Radon is a major problem in Patrick County |
| Pittsylvania | Zone One (High) | 3.0 | Radon is a major problem in Pittsylvania County |
| Powhatan | Zone One (High) | 2.3 | Radon is a major problem in Powhatan County |
| Prince Edward | Zone Two (Mid) | 3.1 | Radon is a problem in Prince Edward County |
| Prince George | Zone Three (Low) | 8.3 | Radon is an extreme problem in Prince George County |
| Prince William | Zone Two (Mid) | 2.8 | Radon is a problem in Prince William County |
| Pulaski | Zone One (High) | 5.7 | Radon is a major problem in Pulaski County |
| Rappahannock | Zone Two (Mid) | 3.4 | Radon is a problem in Rappahannock County |
| Richmond | Zone Three (Low) | 1.5 | Radon is a minor problem in Richmond County |
| Roanoke | Zone One (High) | 2.7 | Radon is a major problem in Roanoke County |
| Rockbridge | Zone One (High) | 5.5 | Radon is a major problem in Rockbridge County |
| Rockingham | Zone One (High) | 4.1 | Radon is a major problem in Rockingham County |
| Russell | Zone One (High) | 7.8 | Radon is a major problem in Russell County |
| Scott | Zone One (High) | 5.0 | Radon is a major problem in Scott County |
| Shenandoah | Zone One (High) | 3.6 | Radon is a major problem in Shenandoah County |
| Smyth | Zone One (High) | 7.5 | Radon is a major problem in Smyth County |
| Southampton | Zone Three (Low) | 0.5 | Radon is a minor problem in Southampton County |
| Spotsylvania | Zone One (High) | 2.5 | Radon is a problem in Spotsylvania County |
| Stafford | Zone One (High) | 2.4 | Radon is a major problem in Stafford County |
| Surry | Zone Three (Low) | 1.0 | Radon is a minor problem in Surry County |
| Sussex | Zone Three (Low) | No Data | Radon is a minor problem in Sussex County |
| Tazewell | Zone One (High) | 5.2 | Radon is a major problem in Tazewell County |
| Warren | Zone One (High) | 4.4 | Radon is a major problem in Warren County |
| Washington | Zone One (High) | 6.0 | Radon is a major problem in Washington County |
| Westmoreland | Zone Three (Low) | 1.8 | Radon is a minor problem in Westmoreland County |
| Wise | Zone Two (Mid) | 5.3 | Radon is a major problem in Wise County |
| Wythe | Zone One (High) | 4.2 | Radon is a major problem in Wythe County |
| York | Zone Three (Low) | 2.5 | Radon is a problem in York County |
Is Radon a Problem in Washington?
| County Name | EPA Zone Designation (1=High, 2=Mid, 3=Low) | Average Radon Level (pCi/L) | Is Radon a Problem in this County? |
|---|---|---|---|
| Adams | Zone Two (Mid) | 9.7 | Radon is an extreme problem in Adams County |
| Asotin | Zone Two (Mid) | 1.8 | Radon is a problem in Asotin County |
| Benton | Zone Two (Mid) | 1.8 | Radon is a problem in Benton County |
| Chelan | Zone Three (Low) | 3.7 | Radon is a problem in Chelan County |
| Clallam | Zone Three (Low) | 0.5 | Radon is a minor problem in Clallam County |
| Clark | Zone One (High) | 2.3 | Radon is a major problem in Clark County |
| Columbia | Zone Two (Mid) | 7.1 | Radon is a major problem in Columbia County |
| Cowlitz | Zone Three (Low) | 1.6 | Radon is a minor problem in Cowlitz County |
| Douglas | Zone Two (Mid) | 3.9 | Radon is a problem in Douglas County |
| Ferry | Zone One (High) | 5.7 | Radon is a major problem in Ferry County |
| Franklin | Zone Two (Mid) | 2.7 | Radon is a problem in Franklin County |
| Garfield | Zone Two (Mid) | 4.3 | Radon is a major problem in Garfield County |
| Grant | Zone Two (Mid) | 4.1 | Radon is a major problem in Grant County |
| Grays Harbor | Zone Three (Low) | 0.5 | Radon is a minor problem in Grays Harbor County |
| Island | Zone Three (Low) | 0.8 | Radon is a minor problem in Island County |
| Jefferson | Zone Three (Low) | 1.9 | Radon is a minor problem in Jefferson County |
| King | Zone Three (Low) | 1.1 | Radon is a minor problem in King County |
| Kitsap | Zone Three (Low) | 0.3 | Radon is a minor problem in Kitsap County |
| Kittitas | Zone Two (Mid) | 1.0 | Radon is a problem in Kittitas County |
| Klickitat | Zone Two (Mid) | 7.8 | Radon is a major problem in Klickitat County |
| Lewis | Zone Three (Low) | 2.2 | Radon is a problem in Lewis County |
| Lincoln | Zone Two (Mid) | 4.8 | Radon is a major problem in Lincoln County |
| Mason | Zone Three (Low) | 0.7 | Radon is a minor problem in Mason County |
| Okanogan | Zone One (High) | 5.0 | Radon is a major problem in Okanogan County |
| Pacific | Zone Three (Low) | 3.7 | Radon is a problem in Pacific County |
| Pend Oreille | Zone One (High) | 5.8 | Radon is a major problem in Pend Oreille County |
| Pierce | Zone Three (Low) | 1.4 | Radon is a minor problem in Pierce County |
| San Juan | Zone Three (Low) | 0.7 | Radon is a minor problem in San Juan County |
| Skagit | Zone Three (Low) | 0.4 | Radon is a minor problem in Skagit County |
| Skamania | Zone One (High) | 2.6 | Radon is a major problem in Skamania County |
| Snohomish | Zone Three (Low) | 0.4 | Radon is a minor problem in Snohomish County |
| Spokane | Zone One (High) | 8.5 | Radon is an extreme problem in Spokane County |
| Stevens | Zone One (High) | 8.4 | Radon is an extreme problem in Stevens County |
| Thurston | Zone Three (Low) | 1.4 | Radon is a minor problem in Thurston County |
| Wahkiakum | Zone Three (Low) | 1.6 | Radon is a minor problem in Wahkiakum County |
| Walla Walla | Zone Two (Mid) | 4.3 | Radon is a major problem in Walla Walla County |
| Whatcom | Zone Three (Low) | 1.3 | Radon is a minor problem in Whatcom County |
| Whitman | Zone Two (Mid) | 3.2 | Radon is a problem in Whitman County |
| Yakima | Zone Two (Mid) | 1.6 | Radon is a problem in Yakima County |
Is Radon a Problem in Washington DC?
| County Name | EPA Zone Designation (1=High, 2=Mid, 3=Low) | Average Radon Level (pCi/L) | Is Radon a Problem in this County? |
|---|---|---|---|
| District of Columbia | Zone Three (Low) | 1.6 | Radon is a minor problem in the District of Columbia |
Is Radon a Problem in West Virginia?
| County Name | EPA Zone Designation (1=High, 2=Mid, 3=Low) | Average Radon Level (pCi/L) | Is Radon a Problem in this County? |
|---|---|---|---|
| Barbour | Zone Two (Mid) | 2.0 | Radon is a problem in Barbour County |
| Berkeley | Zone One (High) | 8.4 | Radon is an extreme problem in Berkeley County |
| Boone | Zone Three (Low) | 1.5 | Radon is a minor problem in Boone County |
| Braxton | Zone Two (Mid) | 1.8 | Radon is a problem in Braxton County |
| Brooke | Zone One (High) | 7.6 | Radon is a major problem in Brooke County |
| Cabell | Zone Two (Mid) | 2.3 | Radon is a problem in Cabell County |
| Calhoun | Zone Two (Mid) | 1.5 | Radon is a problem in Calhoun County |
| Clay | Zone Two (Mid) | 1.2 | Radon is a problem in Clay County |
| Doddridge | Zone Two (Mid) | 2.6 | Radon is a problem in Doddridge County |
| Fayette | Zone Two (Mid) | 1.9 | Radon is a problem in Fayette County |
| Gilmer | Zone Two (Mid) | 5.5 | Radon is a major problem in Gilmer County |
| Grant | Zone One (High) | 3.2 | Radon is a major problem in Grant County |
| Greenbrier | Zone One (High) | 10.5 | Radon is an extreme problem in Greenbrier County |
| Hampshire | Zone One (High) | 8.1 | Radon is an extreme problem in Hampshire County |
| Hancock | Zone One (High) | 7.9 | Radon is a major problem in Hancock County |
| Hardy | Zone One (High) | 4.3 | Radon is a major problem in Hardy County |
| Harrison | Zone Two (Mid) | 3.3 | Radon is a problem in Harrison County |
| Jackson | Zone Two (Mid) | 3.2 | Radon is a problem in Jackson County |
| Jefferson | Zone One (High) | 7.7 | Radon is a major problem in Jefferson County |
| Kanawha | Zone Three (Low) | 2.9 | Radon is a problem in Kanawha County |
| Lewis | Zone Two (Mid) | 2.9 | Radon is a problem in Lewis County |
| Lincoln | Zone Two (Mid) | 1.5 | Radon is a problem in Lincoln County |
| Logan | Zone Three (Low) | 1.9 | Radon is a minor problem in Logan County |
| Marion | Zone Two (Mid) | 3.8 | Radon is a problem in Marion County |
| Marshall | Zone One (High) | 4.4 | Radon is a major problem in Marshall County |
| Mason | Zone Two (Mid) | 2.7 | Radon is a problem in Mason County |
| McDowell | Zone Three (Low) | 2.4 | Radon is a problem in McDowell County |
| Mercer | Zone One (High) | 3.2 | Radon is a major problem in Mercer County |
| Mineral | Zone One (High) | 5.5 | Radon is a major problem in Mineral County |
| Mingo | Zone Three (Low) | 2.5 | Radon is a problem in Mingo County |
| Monongalia | Zone One (High) | 3.4 | Radon is a major problem in Monongalia County |
| Monroe | Zone One (High) | 3.4 | Radon is a major problem in Monroe County |
| Morgan | Zone One (High) | 12.2 | Radon is an extreme problem in Morgan County |
| Nicholas | Zone Three (Low) | 1.9 | Radon is a minor problem in Nicholas County |
| Ohio | Zone One (High) | 6.7 | Radon is a major problem in Ohio County |
| Pendleton | Zone One (High) | 6.2 | Radon is a major problem in Pendleton County |
| Pleasants | Zone Two (Mid) | 3.3 | Radon is a problem in Pleasants County |
| Pocahontas | Zone One (High) | 4.4 | Radon is a major problem in Pocahontas County |
| Preston | Zone One (High) | 7.4 | Radon is a major problem in Preston County |
| Putnam | Zone Two (Mid) | 2.6 | Radon is a problem in Putnam County |
| Raleigh | Zone Two (Mid) | 2.4 | Radon is a problem in Raleigh County |
| Randolph | Zone Two (Mid) | 3.2 | Radon is a problem in Randolph County |
| Ritchie | Zone Two (Mid) | 2.3 | Radon is a problem in Ritchie County |
| Roane | Zone Two (Mid) | 2.9 | Radon is a problem in Roane County |
| Summers | Zone One (High) | 2.8 | Radon is a major problem in Summers County |
| Taylor | Zone Two (Mid) | 2.8 | Radon is a problem in Taylor County |
| Tucker | Zone Two (Mid) | 5.2 | Radon is a major problem in Tucker County |
| Tyler | Zone Two (Mid) | 3.1 | Radon is a problem in Tyler County |
| Upshur | Zone Two (Mid) | 2.1 | Radon is a problem in Upshur County |
| Wayne | Zone Two (Mid) | 1.2 | Radon is a problem in Wayne County |
| Webster | Zone Two (Mid) | 3.5 | Radon is a problem in Webster County |
| Wetzel | Zone One (High) | 3.9 | Radon is a major problem in Wetzel County |
| Wirt | Zone Two (Mid) | 2.0 | Radon is a problem in Wirt County |
| Wood | Zone Two (Mid) | 2.3 | Radon is a problem in Wood County |
| Wyoming | Zone Three (Low) | 3.1 | Radon is a problem in Wyoming County |
Is Radon a Problem in Wisconsin?
| County Name | EPA Zone Designation (1=High, 2=Mid, 3=Low) | Average Radon Level (pCi/L) | Is Radon a Problem in this County? |
|---|---|---|---|
| Adams | Zone Two (Mid) | 2.4 | Radon is a problem in Adams County |
| Ashland | Zone Two (Mid) | 1.9 | Radon is a problem in Ashland County |
| Barron | Zone Two (Mid) | 4.4 | Radon is a major problem in Barron County |
| Bayfield | Zone Two (Mid) | 2.6 | Radon is a problem in Bayfield County |
| Brown | Zone Two (Mid) | 3.6 | Radon is a problem in Brown County |
| Buffalo | Zone One (High) | 4.2 | Radon is a major problem in Buffalo County |
| Burnett | Zone Two (Mid) | 2.6 | Radon is a problem in Burnett County |
| Calumet | Zone Two (Mid) | 4.6 | Radon is a major problem in Calumet County |
| Chippewa | Zone Two (Mid) | 4.8 | Radon is a major problem in Chippewa County |
| Clark | Zone Two (Mid) | 3.4 | Radon is a problem in Clark County |
| Columbia | Zone Two (Mid) | 3.4 | Radon is a problem in Columbia County |
| Crawford | Zone One (High) | 7.2 | Radon is a major problem in Crawford County |
| Dane | Zone One (High) | 3.3 | Radon is a major problem in Dane County |
| Dodge | Zone One (High) | 6.0 | Radon is a major problem in Dodge County |
| Door | Zone One (High) | 5.5 | Radon is a major problem in Door County |
| Douglas | Zone Two (Mid) | 2.3 | Radon is a problem in Douglas County |
| Dunn | Zone Two (Mid) | 6.3 | Radon is a major problem in Dunn County |
| Eau Claire | Zone Two (Mid) | 5.3 | Radon is a major problem in Eau Claire County |
| Florence | Zone Two (Mid) | 5.6 | Radon is a major problem in Florence County |
| Fond Du Lac | Zone One (High) | 4.6 | Radon is a major problem in Fond Du Lac County |
| Forest | Zone Two (Mid) | 3.3 | Radon is a problem in Forest County |
| Grant | Zone One (High) | 5.2 | Radon is a major problem in Grant County |
| Green | Zone One (High) | 4.7 | Radon is a major problem in Green County |
| Green Lake | Zone One (High) | 6.1 | Radon is a major problem in Green Lake County |
| Iowa | Zone One (High) | 6.1 | Radon is a major problem in Iowa County |
| Iron | Zone Two (Mid) | 2.6 | Radon is a problem in Iron County |
| Jackson | Zone Two (Mid) | 3.1 | Radon is a problem in Jackson County |
| Jefferson | Zone One (High) | 2.3 | Radon is a major problem in Jefferson County |
| Juneau | Zone Two (Mid) | 2.9 | Radon is a problem in Juneau County |
| Kenosha | Zone Two (Mid) | 4.0 | Radon is a major problem in Kenosha County |
| Kewaunee | Zone Two (Mid) | 6.5 | Radon is a major problem in Kewaunee County |
| La Crosse | Zone Two (Mid) | 3.4 | Radon is a problem in La Crosse County |
| Lafayette | Zone One (High) | 6.5 | Radon is a major problem in Lafayette County |
| Langlade | Zone One (High) | 8.1 | Radon is an extreme problem in Langlade County |
| Lincoln | Zone Two (Mid) | 6.3 | Radon is a major problem in Lincoln County |
| Manitowoc | Zone Two (Mid) | 3.7 | Radon is a problem in Manitowoc County |
| Marathon | Zone One (High) | 12.1 | Radon is an extreme problem in Marathon County |
| Marinette | Zone Two (Mid) | 3.0 | Radon is a problem in Marinette County |
| Marquette | Zone Two (Mid) | 1.7 | Radon is a problem in Marquette County |
| Menominee | Zone One (High) | 4.9 | Radon is a major problem in Menominee County |
| Milwaukee | Zone Two (Mid) | 3.4 | Radon is a problem in Milwaukee County |
| Monroe | Zone Two (Mid) | 2.5 | Radon is a problem in Monroe County |
| Oconto | Zone Two (Mid) | 7.8 | Radon is a major problem in Oconto County |
| Oneida | Zone Two (Mid) | 3.4 | Radon is a problem in Oneida County |
| Outagamie | Zone Two (Mid) | 5.1 | Radon is a major problem in Outagamie County |
| Ozaukee | Zone Two (Mid) | 3.8 | Radon is a problem in Ozaukee County |
| Pepin | Zone One (High) | 5.2 | Radon is a major problem in Pepin County |
| Pierce | Zone One (High) | 5.8 | Radon is a major problem in Pierce County |
| Polk | Zone Two (Mid) | 4.4 | Radon is a major problem in Polk County |
| Portage | Zone One (High) | 5.9 | Radon is a major problem in Portage County |
| Price | Zone Two (Mid) | 4.6 | Radon is a major problem in Price County |
| Racine | Zone Two (Mid) | 5.1 | Radon is a major problem in Racine County |
| Richland | Zone One (High) | 3.3 | Radon is a problem in Richland County |
| Rock | Zone One (High) | 4.0 | Radon is a major problem in Rock County |
| Rusk | Zone Two (Mid) | 4.9 | Radon is a major problem in Rusk County |
| Saint Croix (St. Croix) | Zone One (High) | 4.8 | Radon is a major problem in Saint Croix County |
| Sauk | Zone Two (Mid) | 4.0 | Radon is a major problem in Sauk County |
| Sawyer | Zone Two (Mid) | 3.2 | Radon is a problem in Sawyer County |
| Shawano | Zone One (High) | 6.2 | Radon is a major problem in Shawano County |
| Sheboygan | Zone Two (Mid) | 3.9 | Radon is a problem in Sheboygan County |
| Taylor | Zone Two (Mid) | 3.6 | Radon is a problem in Taylor County |
| Trempealeau | Zone Two (Mid) | 5.2 | Radon is a major problem in Trempealeau County |
| Vernon | Zone One (High) | 5.8 | Radon is a major problem in Vernon County |
| Vilas | Zone Two (Mid) | 3.7 | Radon is a problem in Vilas County |
| Walworth | Zone One (High) | 4.8 | Radon is a major problem in Walworth County |
| Washburn | Zone Two (Mid) | 4.0 | Radon is a major problem in Washburn County |
| Washington | Zone One (High) | 5.5 | Radon is a major problem in Washington County |
| Waukesha | Zone One (High) | 5.3 | Radon is a major problem in Waukesha County |
| Waupaca | Zone One (High) | 7.1 | Radon is a major problem in Waupaca County |
| Waushara | Zone Two (Mid) | 2.8 | Radon is a problem in Waushara County |
| Winnebago | Zone Two (Mid) | 6.3 | Radon is a major problem in Winnebago County |
| Wood | Zone One (High) | 4.5 | Radon is a major problem in Wood County |
Is Radon a Problem in Wyoming?
Radon is a The average level for radon in Wyoming is 5.0 pCi/L which is much higher than the national average of 1.3 pCi/L. Radon is a problem in Wyoming, just like it is in every US state. 21 different counties in Wyoming have been flagged for having higher levels of radon than what is common. These counties include Albany, Big Horn, Campbell, Carbon, Converse, Crook, Fremont, Goshen, Hot Springs, Johnson, Laramie, Lincoln, Natrona, Park, Sheridan, Sublette, Sweetwater, Teton, Uinta, and Washakie.
If you live in any of these counties, please run a radon test as soon as you can. You can do these yourself, or you can hire professionals. If you choose to run your own radon test, please visit this article to read about and pick up either the radon test kit that we recommend or our favorite radon detectors.
There are just 2 counties that are in the EPA’s Zone Two (2-4 pCi/L) range, which is an area where radon is still a problem, but is not quite as bad as it is in the Zone One areas. It’s recommended that you test your home’s air for radon if you’re in a Zone Two area.
Finally, there aren’t any counties that the EPA classified as Zone Three (radon levels between 0-1.9 pCi/L) range. Some counties do have lower radon levels on average, but it’s still recommended to test for radon in your home.
At the end of the day, counties that are marked as Zone One by the EPA have an increased risk of having a radon problem that’s really high, areas that are Zone Two mave a higher risk of having a mid-level radon threat, and Zone One counties have the lowest risk. Whatever zoning you’re in, it’s wisest to test for radon in your home. The zone designations serve as more of an idea on what you might be able to expect from your radon test results.
Here’s a county by county breakdown of Wyoming’s radon levels, as per the EPA and radon.com. If you would like to read up on what the data means for your county, you can do so on our article here.
| County Name | EPA Zone Designation (1=High, 2=Mid, 3=Low) | Average Radon Level (pCi/L) | Is Radon a Problem in this County? |
|---|---|---|---|
| Albany | Zone One (High) | 3.9 | Radon is a major problem in Albany County |
| Big Horn | Zone One (High) | 3.8 | Radon is a major problem in Big Horn County |
| Campbell | Zone One (High) | 4.3 | Radon is a major problem in Campbell County |
| Carbon | Zone One (High) | 3.3 | Radon is a major problem in Carbon County |
| Converse | Zone One (High) | 6.0 | Radon is a major problem in Converse County |
| Crook | Zone One (High) | 6.0 | Radon is a major problem in Crook County |
| Fremont | Zone One (High) | 6.6 | Radon is a major problem in Fremont County |
| Goshen | Zone One (High) | 4.3 | Radon is a major problem in Goshen County |
| Hot Springs | Zone One (High) | 5.4 | Radon is a major problem in Hot Springs County |
| Johnson | Zone One (High) | 4.2 | Radon is a major problem in Johnson County |
| Laramie | Zone One (High) | 3.4 | Radon is a major problem in Laramie County |
| Lincoln | Zone One (High) | 9.2 | Radon is an extreme problem in Lincoln County |
| Natrona | Zone One (High) | 4.7 | Radon is a major problem in Natrona County |
| Niobrara | Zone One (High) | 3.1 | Radon is a major problem in Niobrara County |
| Park | Zone One (High) | 4.6 | Radon is a major problem in Park County |
| Platte | Zone Two (Mid) | 3.7 | Radon is a problem in Platte County |
| Sheridan | Zone One (High) | 6.5 | Radon is a major problem in Sheridan County |
| Sublette | Zone One (High) | 4.1 | Radon is a major problem in Sublette County |
| Sweetwater | Zone One (High) | 5.6 | Radon is a major problem in Sweetwater County |
| Teton | Zone One (High) | 6.8 | Radon is a major problem in Teton County |
| Uinta | Zone One (High) | 2.6 | Radon is a major problem in Uinta County |
| Washakie | Zone One (High) | 3.2 | Radon is a major problem in Washakie County |
| Weston | Zone Two (Mid) | 8.1 | Radon is an extreme problem in Weston County |