Is Radon a Problem Where I Live in the USA?





Radon is a widespread problem in the entire USA
Radon is a widespread problem in the entire USA

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 NameEPA Zone Designation
(1=High, 2=Mid, 3=Low)
Average Radon
Level (pCi/L)
Is Radon a Problem
in this County?
AutaugaZone Two (Mid)1.4Radon is a problem in Autauga County
BaldwinZone Three (Low)1.3Radon is a minor problem in Baldwin County
BarbourZone Two (Mid)0.4Radon is a problem in Barbour County
BibbZone Two (Mid)2.6Radon is a problem in Bibb County
BlountZone Two (Mid)1.3Radon is a problem in Blount County
BullockZone Two (Mid)No DataRadon is a problem in Bullock County
ButlerZone Three (Low)0.9Radon is a minor problem in Butler County
CalhounZone One (High)2.2Radon is a major problem in Calhoun County
Chambers Zone Three (Low)0.3Radon is a minor problem in Chambers County
CherokeeZone Two (Mid)1.0Radon is a problem in Cherokee County
ChiltonZone Two (Mid)2.6Radon is a problem in Chilton County
ChoctawZone Three (Low)0.3Radon is a minor problem in Choctaw County
ClarkeZone Three (Low)1.1Radon is a minor problem in Clarke County
ClayZone One (High)2.9Radon is a major problem in Clay County
CleburneZone One (High)2.9Radon is a major problem in Cleburne County
CoffeeZone Three (Low)1.6Radon is a minor problem in Coffee County
ColbertZone One (High)4.3Radon is a major problem in Colbert County
ConecuhZone Three (Low)0.6Radon is a minor problem in Conecuh County
CoosaZone One (High)2.8Radon is a major problem in Coosa County
CovingtonZone Three (Low)0.6Radon is a minor problem in Covington County
CrenshawZone Three (Low)3.4Radon is a problem in Crenshaw County
CullmanZone Two (Mid)1.6Radon is a problem in Cullman County
DaleZone Three (Low)0.8Radon is a minor problem in Dale County
DallasZone Two (Mid)0.7Radon is a problem in Dallas County
DeKalbZone Two (Mid)1.6Radon is a problem in DeKalb County
ElmoreZone Two (Mid)1.7Radon is a problem in Elmore County
EscambiaZone Three (Low)0.4Radon is a minor problem in Escambia County
EtowahZone Two (Mid)1.5Radon is a problem in Etowah County
FayetteZone Two (Mid)1.6Radon is a problem in Fayette County
FranklinZone One (High)3.3Radon is a major problem in Franklin County
GenevaZone Three (Low)1.0Radon is a minor problem in Geneva County
GreeneZone Two (Mid)1.0Radon is a problem in Greene County
HaleZone Two (Mid)3.4Radon is a problem in Hale County
HenryZone Three (Low)1.6Radon is a minor problem in Henry County
HoustonZone Three (Low)1.4Radon is a minor problem in Houston County
Jackson Zone One (High)2.3Radon is a major problem in Jackson County
JeffersonZone Two (Mid)1.8Radon is a problem in Jefferson County
LamarZone Two (Mid)2.7Radon is a problem in Lamar County
Lauderdale Zone One (High)3.0Radon is a major problem in Lauderdale County
LawrenceZone One (High)2.3Radon is a major problem in Lawrence County
LeeZone Two (Mid)0.9Radon is a problem in Lee County
LimestoneZone One (High)1.7Radon is a major problem in Limestone County
LowndesZone Two (Mid)No DataRadon is a problem in Lowndes County
MaconZone Two (Mid)0.2Radon is a problem in Macon County
MadisonZone One (High)4.6Radon is a major problem in Madison County
MarengoZone Three (Low)1.7Radon is a minor problem in Marengo County
MarionZone Two (Mid)2.4Radon is a problem in Marion County 
MarshallZone Two (Mid)1.5Radon is a problem in Marshall County
MobileZone Three (Low)0.8Radon is a minor problem in Mobile County
MonroeZone Three (Low)0.9Radon is a minor problem in Monroe County
MontgomeryZone Two (Mid)2.3Radon is a problem in Montgomery County
MorganZone One (High)3.1Radon is a major problem in Morgan County
PerryZone Two (Mid)14.4Radon is an extreme problem in Perry County
PickensZone Two (Mid)1.3Radon is a problem in Pickens County
PikeZone Three (Low)0.9Radon is a minor problem in Pike County
RandolphZone Two (Mid)4.5Radon is a major problem in Randolph County
RussellZone Two (Mid)0.4Radon is a problem in Russell County
Saint Clair
(St. Clair)
Zone Two (Mid)1.9Radon is a problem in Saint Clair County
ShelbyZone Two (Mid)1.8Radon is a problem in Shelby County
SumterZone Two (Mid)2.3Radon is a problem in Sumter County
TalladegaZone One (High)1.8Radon is a major problem in Talladega County
TallapoosaZone Three (Low)52.7Radon is an extreme problem in Tallapoosa County
TuscaloosaZone Two (Mid)1.2Radon is a problem in Tuscaloosa County
WalkerZone Two (Mid)1.5Radon is a problem in Walker County
WashingtonZone Three (Low)0.4Radon is a minor problem in Washington County
WilcoxZone Three (Low)4.5Radon is a major problem in Wilcox County
WinstonZone Two (Mid)1.2Radon 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 NameEPA 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 DataRadon is a minor problem in Aleutians East Borough
Aleutians West Zone Three (Low)No DataRadon is a minor problem in Aleutians West Borough
Anchorage Zone Two (Mid)1.6Radon is a problem in Anchorage Borough
Bethel Zone Three (Low)No DataRadon is a minor problem in Bethel Borough
Bristol Bay Zone Three (Low)0.7Radon is a minor problem in Bristol Bay Borough
Denali Zone Three (Low)6.7Radon is a major problem in Denali Borough
Dillingham Zone Three (Low)2.1Radon is a problem in Dillingham Borough
Fairbanks North Star Zone Two (Mid)15.6Radon is an extreme problem in Fairbanks North Star Borough
Haines Zone Three (Low)13.5Radon is an extreme problem in Haines Borough
Juneau Zone Three (Low)2.2Radon is a problem in Juneau Borough
Kenai Peninsula Zone Two (Mid)2.7Radon is a problem in Kenai Peninsula Borough
Ketchikan Gateway Zone Three (Low)0.5Radon is a minor problem in Ketchikan Gateway Borough
Kodiak Island Zone Three (Low)2.9Radon is a problem in Kodiak Island Borough
Lake and Peninsula Zone Three (Low)No DataRadon is a problem in Lake and Peninsula Borough
Matanuska Susitna Zone Two (Mid)4.3Radon is a major problem in Matanuska Susitna Borough
Nome Zone Three (Low)6.4Radon is a major problem in Nome Borough
North Slope Zone Three (Low)0.2Radon is a minor problem in North Slope Borough
Northwest Arctic Zone Three (Low)0.3Radon is a minor problem in Northwest Arctic Borough
Prince Wales Ketchikan Zone Three (Low)0.7Radon is a minor problem in Prince Wales Ketchikan Borough
Sitka Zone Three (Low)0.2Radon is a minor problem in Sitka Borough
Skagway Hoonah AngoonZone Three (Low)0.1Radon is a minor problem in Skagway Hoonah Angoon Borough
Southeast Fairbanks Zone Two (Mid)5.3Radon is a major problem in Southeast Fairbanks Borough
Valdez Cordova Zone Three (Low)2.9Radon is a problem in Valdez Cordova Borough
Wade Hampton Zone Three (Low)0.5Radon is a minor problem in Wade Hampton Borough
Wrangell Petersburg Zone Three (Low)0.5Radon is a minor problem in Wrangell Petersburg Borough
Yakutat Zone Three (Low)No DataRadon is a minor problem in Yakutat Borough
Yukon Koyukuk Zone Three (Low)4.1Radon 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 NameEPA Zone Designation
(1=High, 2=Mid, 3=Low)
Average Radon
Level (pCi/L)
Is Radon a Problem in this County?
ApacheZone Two (Mid)0.9Radon is a problem in Apache County
CochiseZone Two (Mid)3.6Radon is a problem in Cochise County
CoconinoZone Two (Mid)4.7Radon is a major problem in Coconino County
GilaZone Two (Mid)2.5Radon is a problem in Gila County
GrahamZone Two (Mid)1.8Radon is a problem in Graham County
GreenleeZone Two (Mid)3.3Radon is a problem in Greenlee County
La PazZone Two (Mid)0.8Radon is a problem in La Paz County
MaricopaZone Two (Mid)2.1Radon is a problem in Maricopa County
MohaveZone Two (Mid)1.6Radon is a problem in Mohave County
NavajoZone Two (Mid)1.3Radon is a problem in Navajo County
PimaZone Two (Mid)1.7Radon is a problem in Pima County
PinalZone Two (Mid)1.4Radon is a problem in Pinal County
Santa CruzZone Two (Mid)1.6Radon is a problem in Santa Cruz County
YavapaiZone Two (Mid)2.9Radon is a problem in Yavapai County
YumaZone Two (Mid)0.8Radon 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 NameEPA Zone Designation
(1=High, 2=Mid, 3=Low)
Average Radon
Level (pCi/L)
Is Radon a Problem in this County?
ArkansasZone Three (Low)No DataRadon is a minor problem in Arkansas County
AshleyZone Three (Low)2.4Radon is a problem in Ashley County
BaxterZone Two (Mid)4.3Radon is a major problem in Baxter County
BentonZone Two (Mid)5.2Radon is a major problem in Benton County
BooneZone Two (Mid)3.0Radon is a problem in Boone County
BradleyZone Three (Low)No DataRadon is a minor problem in Bradley County
CalhounZone Three (Low)No DataRadon is a minor problem in Calhoun County
CarrollZone Two (Mid)4.3Radon is a major problem in Carroll County
ChicotZone Three (Low)0.8Radon is a minor problem in Chicot County
ClarkZone Three (Low)1.3Radon is a minor problem in Clark County
ClayZone Three (Low)0.5Radon is a minor problem in Clay County
CleburneZone Three (Low)1.5Radon is a minor problem in Cleburne County
ClevelandZone Three (Low)4.4Radon is a major problem in Cleveland County
ColumbiaZone Three (Low)1.9Radon is a minor problem in Columbia County
ConwayZone Three (Low)2.0Radon is a problem in Conway County
CraigheadZone Three (Low)1.9Radon is a minor problem in Craighead County
CrawfordZone Three (Low)1.2Radon is a minor problem in Crawford County
CrittendenZone Three (Low)2.1Radon is a problem in Crittenden County
CrossZone Three (Low)No DataRadon is a minor problem in Cross County
DallasZone Three (Low)1.2Radon is a minor problem in Dallas County
DeshaZone Three (Low)No DataRadon is a minor problem in Desha County
DrewZone Three (Low)0.8Radon is a minor problem in Drew County
FaulknerZone Three (Low)1.3Radon is a minor problem in Faulkner County
FranklinZone Three (Low)0.6Radon is a minor problem in Franklin County
FultonZone Two (Mid)4.0Radon is a major problem in Fulton County
GarlandZone Two (Mid)3.9Radon is a problem in Garland County
GrantZone Three (Low)No DataRadon is a minor problem in Grant County
GreeneZone Three (Low)1.5Radon is a minor problem in Greene County
HempsteadZone Three (Low)0.5Radon is a minor problem in Hempstead County
Hot SpringZone Three (Low)No DataRadon is a minor problem in Hot Spring County
HowardZone Three (Low)2.1 Radon is a problem in Howard County
IndependenceZone Two (Mid)1.7Radon is a problem in Independence County
IzardZone Two (Mid)3.5Radon is a problem in Izard County
JacksonZone Three (Low)1.5Radon is a minor problem in Jackson County
JeffersonZone Three (Low)0.6Radon is a minor problem in Jefferson County
JohnsonZone Three (Low)1.9Radon is a minor problem in Johnson County
LafayetteZone Three (Low)No DataRadon is a minor problem in Lafayette County
LawrenceZone Three (Low)3.0Radon is a problem in Lawrence County
LeeZone Three (Low)No DataRadon is a minor problem in Lee County
LincolnZone Three (Low)No DataRadon is a minor problem in Lincoln County
Little RiverZone Three (Low)0.8Radon is a minor problem in Little River County
LoganZone Three (Low)2.5Radon is a problem in Logan County
LonokeZone Three (Low)0.8Radon is a minor problem in Lonoke County
MadisonZone Three (Low)2.9Radon is a problem in Madison County
MarionZone Two (Mid)1.4Radon is a problem in Marion County
MillerZone Three (Low)0.8Radon is a minor problem in Miller County
MississippiZone Three (Low)0.8Radon is a minor problem in Mississippi County
MonroeZone Three (Low)2.8Radon is a problem in Monroe County
MontgomeryZone Two (Mid)2.5Radon is a problem in Montgomery County
NevadaZone Three (Low)No DataRadon is a minor problem in Nevada County
NewtonZone Three (Low)21.8Radon is an extreme problem in Newton County
OuachitaZone Three (Low)0.8Radon is a minor problem in Ouachita County
PerryZone Three (Low)2.5Radon is a problem in Perry County
PhillipsZone Three (Low)No DataRadon is a minor problem in Phillips County
PikeZone Three (Low)0.8Radon is a minor problem in Pike County
PoinsettZone Three (Low)0.7Radon is a minor problem in Poinsett County
PolkZone Three (Low)5.4Radon is a major problem in Polk County
PopeZone Three (Low)0.6Radon is a minor problem in Pope County
PrairieZone Three (Low)No DataRadon is a minor problem in Prairie County
PulaskiZone Three (Low)1.4Radon is a minor problem in Pulaski County
RandolphZone Two (Mid)0.4Radon is a problem in Randolph County
Saint Francis
(St. Francis)
Zone Three (Low)1.0Radon is a minor problem in Saint Francis County
SalineZone Three (Low)1.6Radon is a minor problem in Saline County
ScottZone Three (Low)16.9Radon is an extreme problem in ScottCounty
SearcyZone Two (Mid)2.6Radon is a problem in Searcy County
SebastianZone Three (Low)1.0Radon is a minor problem in Sebastian County
SevierZone Three (Low)1.9Radon is a minor problem in Sevier County
SharpZone Two (Mid)4.3Radon is a major problem in Sharp County
StoneZone Two (Mid)0.9Radon is a problem in Stone County
UnionZone Three (Low)0.2Radon is a minor problem in Union County
Van BurenZone Three (Low)2.1Radon is a problem in Van Buren County
WashingtonZone Three (Low)1.2Radon is a minor problem in Washington County
WhiteZone Three (Low)1.9Radon is a minor problem in White County
WoodruffZone Three (Low)No DataRadon is a minor problem in Woodruff County
YellZone Three (Low)No DataRadon 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 NameEPA Zone Designation
(1=High, 2=Mid, 3=Low)
Average Radon
Level (pCi/L)
Is Radon a Problem in this County?
AlamedaZone Two (Mid)0.9Radon is a problem in Alameda County
AlpineZone Two (Mid)3.2Radon is a problem in Alpine County
AmadorZone Two (Mid)2.2Radon is a problem in Amador County
ButteZone Three (Low)1.6Radon is a minor problem in Butte County
CalaverasZone Two (Mid)4.5Radon is a major problem in Calaveras County
ColusaZone Three (Low)No DataRadon is a minor problem in Colusa County
Contra CostaZone Two (Mid)1.0Radon is a problem in Contra Costa County
Del NorteZone Three (Low)1.8Radon is a minor problem in Del Norte County
El DoradoZone Two (Mid)3.8Radon is a problem in El Dorado County
FresnoZone Two (Mid)1.9Radon is a problem in Fresno County
GlennZone Three (Low)0.2Radon is a minor problem in Glenn County
HumboldtZone Three (Low)1.9Radon is a minor problem in Humboldt County
ImperialZone Three (Low)1.4Radon is a minor problem in Imperial County
InyoZone Two (Mid)3.6Radon is a problem in Inyo County
KernZone Two (Mid)3.7Radon is a problem in Kern County
KingsZone Three (Low)3.0Radon is a problem in Kings County
LakeZone Three (Low)2.4Radon is a problem in Lake County
LassenZone Three (Low)4.3Radon is a major problem in Lassen County
Los AngelesZone Two (Mid)2.6Radon is a problem in Los Angeles County
MaderaZone Two (Mid)2.9Radon is a problem in Madera County
MarinZone Three (Low)1.2Radon is a minor problem in Marin County
MariposaZone Two (Mid)2.3Radon is a problem in Mariposa County
MendocinoZone Three (Low)2.4Radon is a problem in Mendocino County
MercedZone Three (Low)1.7Radon is a minor problem in Merced County
ModocZone Three (Low)1.0Radon is a minor problem in Modoc County
MonoZone Two (Mid)4.8Radon is a major problem in Mono County
MontereyZone Two (Mid)1.2Radon is a problem in Monterey County
NapaZone Three (Low)1.9Radon is a minor problem in Napa County
NevadaZone Two (Mid)3.2Radon is a problem in Nevada County
OrangeZone Two (Mid)1.1Radon is a problem in Orange County
PlacerZone Two (Mid)1.4Radon is a problem in Placer County
PlumasZone Two (Mid)3.8Radon is a problem in Plumas County
RiversideZone Two (Mid)1.0Radon is a problem in Riverside County
SacramentoZone Three (Low)1.2Radon is a minor problem in Sacramento County
San BenitoZone Two (Mid)0.9Radon is a problem in San Benito County
San BernardinoZone Two (Mid)1.2Radon is a problem in San Bernardino County
San DiegoZone Three (Low)0.8Radon is a minor problem in San Diego County
San FranciscoZone Two (Mid)0.5Radon is a problem in San Francisco County
San JoaquinZone Three (Low)2.0Radon is a problem in San Joaquin County
San Luis ObispoZone Two (Mid)1.4Radon is a problem in San Luis Obispo County
San MateoZone Two (Mid)1.2Radon is a problem in San Mateo County
Santa BarbaraZone One (High)4.8Radon is a major problem in Santa Barbara County
Santa ClaraZone Two (Mid)1.3Radon is a problem in Santa Clara County
Santa CruzZone Two (Mid)3.6Radon is a problem in Santa Cruz County
ShastaZone Three (Low)1.2Radon is a minor problem in Shasta County
SierraZone Two (Mid)3.1Radon is a problem in Sierra County
SiskiyouZone Three (Low)26.8Radon is an extreme problem in Siskiyou County
SolanoZone Three (Low)0.5Radon is a minor problem in Solano County
SonomaZone Three (Low)1.0Radon is a minor problem in Sonoma County
StanislausZone Three (Low)1.6Radon is a minor problem in Stanislaus County
SutterZone Three (Low)2.1Radon is a problem in Sutter County
TehamaZone Three (Low)0.6Radon is a minor problem in Tehama County
TrinityZone Three (Low)No DataRadon is a minor problem in Trinity County
TulareZone Two (Mid)2.3Radon is a problem in Tulare County
TuolumneZone Two (Mid)2.6Radon is a problem in Tuolumne County
VenturaZone One (High)1.3Radon is a major problem in Ventura County
YoloZone Three (Low)0.8Radon is a minor problem in Yolo County
YubaZone Two (Mid)0.4Radon 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 NameEPA Zone Designation
(1=High, 2=Mid, 3=Low)
Average Radon
Level (pCi/L)
Is Radon a Problem in this County?
AdamsZone One (High)3.8Radon is a major problem in Adams County
AlamosaZone Two (Mid)2.6Radon is a problem in Alamosa County
ArapahoeZone One (High)4.7Radon is a major problem in Arapahoe County
ArchuletaZone Two (Mid)4.4Radon is a major problem in Archuleta County
BacaZone One (High)4.3Radon is a major problem in Baca County
BentZone One (High)5.9Radon is a major problem in Bent County
BoulderZone One (High)4.7Radon is a major problem in Boulder County
BroomfieldZone One (High)4.3Radon is a major problem in Broomfield County
ChaffeeZone One (High)8.0Radon is an extreme problem in Chaffee County
CheyenneZone One (High)3.6Radon is a major problem in Cheyenne County
Clear CreekZone One (High)12.6Radon is an extreme problem in Clear Creek County
ConejosZone Two (Mid)3.4Radon is a problem in Conejos County
CostillaZone Two (Mid)4.9Radon is a major problem in Costilla County
CrowleyZone One (High)4.3Radon is a major problem in Crowley County
CusterZone One (High)6.0Radon is a major problem in Custer County
DeltaZone One (High)6.5Radon is a major problem in Delta County
DenverZone One (High)3.9Radon is a major problem in Denver County
DoloresZone One (High)7.7Radon is a major problem in Dolores County
DouglasZone One (High)4.0Radon is a major problem in Douglas County
EagleZone Two (Mid)4.9Radon is a major problem in Eagle County
ElbertZone One (High)3.9Radon is a major problem in Elbert County
El PasoZone One (High)5.6Radon is a major problem in El Paso County
FremontZone One (High)6.2Radon is a major problem in Fremont County
GarfieldZone One (High)4.8Radon is a major problem in Garfield County
GilpinZone One (High)9.4Radon is an extreme problem in Gilpin County
GrandZone One (High)5.5Radon is a major problem in Grand County
GunnisonZone One (High)6.5Radon is a major problem in Gunnison County
HinsdaleZone Two (Mid)9.6Radon is an extreme problem in Hinsdale County
HuerfanoZone One (High)4.6Radon is a major problem in Huerfano County
JacksonZone One (High)9.2Radon is an extreme problem in Jackson County
JeffersonZone One (High)5.3Radon is a major problem in Jefferson County
KiowaZone One (High)3.7Radon is a major problem in Kiowa County
Kit CarsonZone One (High)4.8Radon is a major problem in Kit Carson County
LakeZone One (High)8.2Radon is an extreme problem in Lake County
La PlataZone Two (Mid)6.9Radon is a major problem in La Plata County
LarimerZone One (High)6.4Radon is a major problem in Larimer County
Las AnimasZone One (High)4.2Radon is a major problem in Las Animas County
LincolnZone One (High)4.8Radon is a major problem in Lincoln County
LoganZone One (High)4.4Radon is a major problem in Logan County
MesaZone One (High)4.5Radon is a major problem in Mesa County
MineralZone Two (Mid)13.3Radon is an extreme problem in Mineral County
MoffatZone One (High)5.5Radon is a major problem in Moffat County
MontezumaZone One (High)5.2Radon is a major problem in Montezuma County
MontroseZone One (High)8.6Radon is an extreme problem in Montrose County
MorganZone One (High)5.3Radon is a major problem in Morgan County
OteroZone One (High)4.0Radon is a major problem in Otero County
OurayZone One (High)7.4Radon is a major problem in Ouray County
ParkZone One (High)7.3Radon is a major problem in Park County
PhillipsZone One (High)4.3Radon is a major problem in Phillips County
PitkinZone One (High)7.7Radon is a major problem in Pitkin County
ProwersZone One (High)3.6Radon is a major problem in Prowers County
PuebloZone One (High)8.9Radon is an extreme problem in Pueblo County
Rio BlancoZone One (High)4.7Radon is a major problem in Rio Blanco County
Rio GrandeZone Two (Mid)4.6Radon is a major problem in Rio Grande County
RouttZone Two (Mid)6.9Radon is a major problem in Routt County
SaguacheZone Two (Mid)4.4Radon is a major problem in Saguache County
San JuanZone Two (Mid)6.5Radon is a major problem in San Juan County
San MiguelZone One (High)7.0Radon is a major problem in San Miguel County
SedgwickZone One (High)2.4Radon is a major problem in Sedgwick County
SummitZone One (High)8.0Radon is an extreme problem in Summit County
TellerZone One (High)12.8Radon is an extreme problem in Teller County
WashingtonZone One (High)5.8Radon is a major problem in Washington County
WeldZone One (High)4.3Radon is a major problem in Weld County
YumaZone One (High)3.9Radon 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 NameEPA Zone Designation
(1=High, 2=Mid, 3=Low)
Average Radon
Level (pCi/L)
Is Radon a Problem in this County?
FairfieldZone One (High)3.8Radon is a major problem in Fairfield County
HartfordZone Three (Low)2.7Radon is a problem in Hartford County
LitchfieldZone Two (Mid)4.1Radon is a major problem in Litchfield County
MiddlesexZone One (High)2.6Radon is a major problem in Middlesex County
New HavenZone One (High)3.7Radon is a major problem in New Haven County
New LondonZone One (High)3.9Radon is a major problem in New London County
TollandZone Two (Mid)3.2Radon is a problem in Tolland County
WindhamZone Two (Mid)4.1Radon 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 NameEPA Zone Designation
(1=High, 2=Mid, 3=Low)
Average Radon
Level (pCi/L)
Is Radon a Problem in this County?
KentZone Three (Low)1.8Radon is a minor problem in Kent County
New CastleZone Two (Mid)2.6Radon is a problem in New Castle County
SussexZone Three (Low)1.7Radon 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 NameEPA Zone Designation
(1=High, 2=Mid, 3=Low)
Average Radon
Level (pCi/L)
Is Radon a Problem in this County?
AlachuaZone Two (Mid)5.7Radon is a major problem in Alachua County
BakerZone Three (Low)0.8Radon is a minor problem in Baker County
BayZone Three (Low)0.3Radon is a minor problem in Bay County
BradfordZone Three (Low)0.7Radon is a minor problem in Bradford County
BrevardZone Three (Low)0.9Radon is a minor problem in Brevard County
BrowardZone Three (Low)1.6Radon is a minor problem in Broward County
CalhounZone Three (Low)0.4Radon is a minor problem in Calhoun County
CharlotteZone Three (Low)2.0Radon is a problem in Charlotte County
CitrusZone Two (Mid)1.7Radon is a problem in Citrus County
ClayZone Three (Low)1.6Radon is a minor problem in Clay County
CollierZone Three (Low)2.6Radon is a problem in Collier County
ColumbiaZone Two (Mid)0.5Radon is a problem in Columbia County
DeSotoZone Three (Low)0.9Radon is a minor problem in DeSoto County
DixieZone Three (Low)1.0Radon is a minor problem in Dixie County
DuvalZone Three (Low)2.2Radon is a problem in Duval County
EscambiaZone Three (Low)0.5Radon is a minor problem in Escambia County
FlaglerZone Three (Low)1.1Radon is a minor problem in Flagler County
FranklinZone Three (Low)0.3Radon is a minor problem in Franklin County
GadsdenZone Three (Low)0.8Radon is a minor problem in Gadsden County
GilchristZone Three (Low)1.3Radon is a minor problem in Gilchrist County
GladesZone Three (Low)1.6Radon is a minor problem in Glades County
GulfZone Three (Low)0.5Radon is a minor problem in Gulf County
HamiltonZone Three (Low)0.6Radon is a minor problem in Hamilton County
HardeeZone Three (Low)1.0Radon is a minor problem in Hardee County
HendryZone Three (Low)0.9Radon is a minor problem in Hendry County
HernandoZone Three (Low)0.8Radon is a minor problem in Hernando County
HighlandsZone Three (Low)0.9Radon is a minor problem in Highlands County
HillsboroughZone Two (Mid)1.7Radon is a problem in Hillsborough County
HolmesZone Three (Low)0.4Radon is a minor problem in Holmes County
Indian RiverZone Three (Low)0.7Radon is a minor problem in Indian River County
JacksonZone Three (Low)0.7Radon is a minor problem in Jackson County
JeffersonZone Three (Low)1.2Radon is a minor problem in Jefferson County
LafayetteZone Three (Low)0.6Radon is a minor problem in Lafayette County
LakeZone Three (Low)0.9Radon is a minor problem in Lake County
LeeZone Three (Low)2.9Radon is a problem in Lee County
LeonZone Two (Mid)2.5Radon is a problem in Leon County
LevyZone Three (Low)1.8Radon is a minor problem in Levy County
LibertyZone Three (Low)0.1Radon is a minor problem in Liberty County
MadisonZone Three (Low)1.2Radon is a minor problem in Madison County
ManateeZone Three (Low)1.6Radon is a minor problem in Manatee County
MarionZone Two (Mid)5.8Radon is a major problem in Marion County
MartinZone Three (Low)1.0Radon is a minor problem in Martin County
Miami-DadeZone Two (Mid)2.0Radon is a problem in Miami-Dade County
MonroeZone Three (Low)1.2Radon is a minor problem in Monroe County
NassauZone Three (Low)1.7Radon is a minor problem in Nassau County
OkaloosaZone Three (Low)0.5Radon is a minor problem in Okaloosa County
OkeechobeeZone Three (Low)0.7Radon is a minor problem in Okeechobee County
OrangeZone Three (Low)1.6Radon is a minor problem in Orange County
OsceolaZone Three (Low)0.7Radon is a minor problem in Osceola County
Palm BeachZone Three (Low)1.5Radon is a minor problem in Palm Beach County
PascoZone Three (Low)0.9Radon is a minor problem in Pasco County
PinellasZone Three (Low)0.8Radon is a minor problem in Pinellas County
PolkZone Two (Mid)2.4Radon is a problem in Polk County
PutnamZone Three (Low)0.4Radon is a minor problem in Putnam County
Saint Johns
(St. Johns)
Zone Three (Low)1.3Radon is a minor problem in Saint Johns County
Saint Lucie
(St. Lucie)
Zone Three (Low)0.7Radon is a minor problem in Saint Lucie County
Santa RosaZone Three (Low)0.5Radon is a minor problem in Santa Rosa County
SarasotaZone Three (Low)2.0Radon is a problem in Sarasota County
SeminoleZone Three (Low)0.9Radon is a minor problem in Seminole County
SumterZone Three (Low)1.7Radon is a minor problem in Sumter County
SuwanneeZone Three (Low)0.9Radon is a minor problem in Suwannee County
TaylorZone Three (Low)2.4Radon is a problem in Taylor County
UnionZone Two (Mid)1.9Radon is a problem in Union County
VolusiaZone Three (Low)0.6Radon is a minor problem in Volusia County
WakullaZone Three (Low)0.9Radon is a minor problem in Wakulla County
WaltonZone Three (Low)0.7Radon is a minor problem in Walton County
WashingtonZone Three (Low)0.3Radon 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 NameEPA Zone Designation
(1=High, 2=Mid, 3=Low)
Average Radon
Level (pCi/L)
Is Radon a Problem in this County?
ApplingZone Three (Low)No DataRadon is a minor problem in Appling County
AtkinsonZone Three (Low)No DataRadon is a minor problem in Atkinson County
BaconZone Three (Low)No DataRadon is a minor problem in Bacon County
BakerZone Three (Low)No DataRadon is a minor problem in Baker County
BaldwinZone Three (Low)1.7Radon is a minor problem in Baldwin County
BanksZone Two (Mid)3.6Radon is a problem in Banks County
BarrowZone Two (Mid)5.0Radon is a major problem in Barrow County
BartowZone Two (Mid)2.9Radon is a problem in Bartow County
Ben HillZone Three (Low)0.5Radon is a minor problem in Ben Hill County
BerrienZone Three (Low)0.4Radon is a minor problem in Berrien County
BibbZone Three (Low)1.3Radon is a minor problem in Bibb County
BleckleyZone Three (Low)0.6Radon is a minor problem in Bleckley County
BrantleyZone Three (Low)9.5Radon is an extreme problem in Brantley County
BrooksZone Three (Low)1.0Radon is a minor problem in Brooks County
BryanZone Three (Low)0.1Radon is a minor problem in Bryan County
BullochZone Three (Low)0.9Radon is a minor problem in Bulloch County
BurkeZone Three (Low)2.1Radon is a problem in Burke County
ButtsZone Two (Mid)3.5Radon is a problem in Butts County
CalhounZone Three (Low)No DataRadon is a minor problem in Calhoun County
CamdenZone Three (Low)0.5Radon is a minor problem in Camden County
CandlerZone Three (Low)0.7Radon is a minor problem in Candler County
CarrollZone Two (Mid)3.7Radon is a problem in Carroll County
CatoosaZone Two (Mid)2.6Radon is a problem in Catoosa County
CharltonZone Three (Low)No DataRadon is a minor problem in Charlton County
ChathamZone Three (Low)1.8Radon is a minor problem in Chatham County
ChattahoocheeZone Three (Low)0.3Radon is a minor problem in Chattahoochee County
ChattoogaZone Three (Low)3.4Radon is a problem in Chattooga County
CherokeeZone Two (Mid)2.1Radon is a problem in Cherokee County
ClarkeZone Two (Mid)2.0Radon is a problem in Clarke County
ClayZone Three (Low)No DataRadon is a minor problem in Clay County
ClaytonZone Two (Mid)2.1Radon is a problem in Clayton County
ClinchZone Three (Low)2.5Radon is a problem in Clinch County
CobbZone One (High)1.9Radon is a major problem in Cobb County
CoffeeZone Three (Low)1.1Radon is a minor problem in Coffee County
ColquittZone Three (Low)0.5Radon is a minor problem in Colquitt County
ColumbiaZone Three (Low)1.1Radon is a minor problem in Columbia County
CookZone Three (Low)2.1Radon is a problem in Cook County
CowetaZone Two (Mid)2.7Radon is a problem in Coweta County
CrawfordZone Three (Low)3.2Radon is a problem in Crawford County
CrispZone Three (Low)0.2Radon is a minor problem in Crisp County
DadeZone Three (Low)2.3Radon is a problem in Dade County
DawsonZone Two (Mid)2.4Radon is a problem in Dawson County
DeKalbZone One (High)2.6Radon is a major problem in DeKalb County
DecaturZone Three (Low)1.1Radon is a minor problem in Decatur County
DodgeZone Three (Low)0.2Radon is a minor problem in Dodge County
DoolyZone Three (Low)0.4Radon is a minor problem in Dooly County
DoughertyZone Three (Low)1.6Radon is a minor problem in Dougherty County
DouglasZone Two (Mid)4.1Radon is a major problem in Douglas County
EarlyZone Three (Low)1.8Radon is a minor problem in Early County
EcholsZone Three (Low)No DataRadon is a minor problem in Echols County
EffinghamZone Three (Low)0.7Radon is a minor problem in Effingham County
ElbertZone Two (Mid)2.6Radon is a problem in Elbert County
EmanuelZone Three (Low)0.7Radon is a minor problem in Emanuel County
EvansZone Three (Low)0.7Radon is a minor problem in Evans County
FanninZone Two (Mid)4.6Radon is a major problem in Fannin County
FayetteZone Two (Mid)3.0Radon is a problem in Fayette County
FloydZone Two (Mid)1.9Radon is a problem in Floyd County
ForsythZone Two (Mid)1.9Radon is a problem in Forsyth County
FranklinZone Two (Mid)3.7Radon is a problem in Franklin County
FultonZone One (High)2.3Radon is a major problem in Fulton County
GilmerZone Two (Mid)4.3Radon is a major problem in Gilmer County
GlascockZone Three (Low)1.3Radon is a minor problem in Glascock County
GlynnZone Three (Low)0.8Radon is a minor problem in Glynn County
GordonZone Three (Low)2.8Radon is a problem in Gordon County
GradyZone Three (Low)No DataRadon is a minor problem in Grady County
GreeneZone Two (Mid)2.6Radon is a problem in Greene County
GwinnettZone One (High)3.2Radon is a major problem in Gwinnett County
HabershamZone Two (Mid)3.4Radon is a problem in Habersham County
HallZone Two (Mid)3.6Radon is a problem in Hall County
HancockZone Three (Low)2.6Radon is a problem in Hancock County
HaralsonZone Two (Mid)4.0Radon is a major problem in Haralson County
HarrisZone Two (Mid)8.0Radon is an extreme problem in Harris County
HartZone Two (Mid)4.3Radon is a major problem in Hart County
HeardZone Two (Mid)2.5Radon is a problem in Heard County
HenryZone Two (Mid)2.5Radon is a problem in Henry County
HoustonZone Three (Low)2.1Radon is a problem in Houston County
IrwinZone Three (Low)No DataRadon is a minor problem in Irwin County
JacksonZone Two (Mid)4.1Radon is a major problem in Jackson County
JasperZone Two (Mid)2.8Radon is a problem in Jasper County
Jeff DavisZone Three (Low)No DataRadon is a minor problem in Jeff Davis County
JeffersonZone Three (Low)2.0Radon is a problem in Jefferson County
JenkinsZone Three (Low)1.3Radon is a minor problem in Jenkins County
JohnsonZone Three (Low)2.2Radon is a problem in Johnson County
JonesZone Three (Low)3.2Radon is a problem in Jones County
LamarZone Two (Mid)3.6Radon is a problem in Lamar County
LanierZone Three (Low)No DataRadon is a minor problem in Lanier County
LaurensZone Three (Low)1.2Radon is a minor problem in Laurens County
LeeZone Three (Low)1.0Radon is a minor problem in Lee County
LibertyZone Three (Low)0.3Radon is a minor problem in Liberty County
LincolnZone Three (Low)0.6Radon is a minor problem in Lincoln County
LongZone Three (Low)No DataRadon is a minor problem in Long County
LowndesZone Three (Low)1.0Radon is a minor problem in Lowndes County
LumpkinZone Two (Mid)3.8Radon is a problem in Lumpkin County
MaconZone Three (Low)1.5Radon is a minor problem in Macon County
MadisonZone Two (Mid)2.4Radon is a problem in Madison County
MarionZone Three (Low)1.4Radon is a minor problem in Marion County
McDuffieZone Three (Low)2.9Radon is a problem in McDuffie County
McIntoshZone Three (Low)0.8Radon is a minor problem in McIntosh County
MeriwetherZone Two (Mid)1.4Radon is a problem in Meriwether County
MillerZone Three (Low)No DataRadon is a minor problem in Miller County
MitchellZone Three (Low)0.9Radon is a minor problem in Mitchell County
MonroeZone Two (Mid)2.8Radon is a problem in Monroe County
MontgomeryZone Three (Low)1.0Radon is a minor problem in Montgomery County
MorganZone Two (Mid)1.6Radon is a problem in Morgan County
MurrayZone Three (Low)0.9Radon is a minor problem in Murray County
MuscogeeZone Three (Low)1.5Radon is a minor problem in Muscogee County
NewtonZone Two (Mid)2.9Radon is a problem in Newton County
OconeeZone Two (Mid)2.0Radon is a problem in Oconee County
OglethorpeZone Two (Mid)3.7Radon is a problem in Oglethorpe County
PauldingZone Two (Mid)3.3Radon is a problem in Paulding County
PeachZone Three (Low)2.5Radon is a problem in Peach County
PickensZone Two (Mid)3.7Radon is a problem in Pickens County
PierceZone Three (Low)0.3Radon is a minor problem in Pierce County
PikeZone Two (Mid)5.2Radon is a major problem in Pike County
PolkZone Three (Low)3.5Radon is a problem in Polk County
PulaskiZone Three (Low)1.0Radon is a minor problem in Pulaski County
PutnamZone Three (Low)5.4Radon is a major problem in Putnam County
QuitmanZone Three (Low)No DataRadon is a minor problem in Quitman County
RabunZone Two (Mid)3.7Radon is a problem in Rabun County
RandolphZone Three (Low)1.5Radon is a minor problem in Randolph County
RichmondZone Two (Mid)1.1Radon is a problem in Richmond County
RockdaleZone Two (Mid)3.3Radon is a problem in Rockdale County
SchleyZone Three (Low)0.8Radon is a minor problem in Schley County
ScrevenZone Three (Low)0.4Radon is a minor problem in Screven County
SeminoleZone Three (Low)No DataRadon is a minor problem in Seminole County
SpaldingZone Two (Mid)3.8Radon is a problem in Spalding County
StephensZone Two (Mid)2.8Radon is a problem in Stephens County
StewartZone Three (Low)0.6Radon is a minor problem in Stewart County
SumterZone Three (Low)0.9Radon is a minor problem in Sumter County
TalbotZone Two (Mid)0.9Radon is a problem in Talbot County
TaliaferroZone Three (Low)80.7Radon is an extreme problem in Taliaferro County
TattnallZone Three (Low)0.6Radon is a minor problem in Tattnall County
TaylorZone Three (Low)No DataRadon is a minor problem in Taylor County
TelfairZone Three (Low)0.6Radon is a minor problem in Telfair County
TerrellZone Three (Low)0.6Radon is a minor problem in Terrell County
ThomasZone Three (Low)1.1Radon is a minor problem in Thomas County
TiftZone Three (Low)0.9Radon is a minor problem in Tift County
ToombsZone Three (Low)0.5Radon is a minor problem in Toombs County
TownsZone Two (Mid)3.9Radon is a problem in Towns County
TreutlenZone Three (Low)No DataRadon is a minor problem in Treutlen County
TroupZone Two (Mid)2.8Radon is a problem in Troup County
TurnerZone Three (Low)0.9Radon is a minor problem in Turner County
TwiggsZone Three (Low)3.6Radon is a problem in Twiggs County
UnionZone Two (Mid)4.5Radon is a major problem in Union County
UpsonZone Two (Mid)1.1Radon is a problem in Upson County
WalkerZone Two (Mid)2.6Radon is a problem in Walker County
WaltonZone Two (Mid)3.6Radon is a problem in Walton County
WareZone Three (Low)0.5Radon is a minor problem in Ware County
WarrenZone Two (Mid)0.8Radon is a problem in Warren County
WashingtonZone Three (Low)0.9Radon is a minor problem in Washington County
WayneZone Three (Low)0.4Radon is a minor problem in Wayne County
WebsterZone Three (Low)0.5Radon is a minor problem in Webster County
WheelerZone Three (Low)0.4Radon is a minor problem in Wheeler County
WhiteZone Two (Mid)2.9Radon is a problem in White County
WhitfieldZone Two (Mid)2.1Radon is a problem in Whitfield County
WilcoxZone Three (Low)1.1Radon is a minor problem in Wilcox County
WilkesZone Three (Low)1.1Radon is a minor problem in Wilkes County
WilkinsonZone Three (Low)2.1Radon is a problem in Wilkinson County
WorthZone Three (Low)2.7Radon 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 NameEPA Zone Designation
(1=High, 2=Mid, 3=Low)
Average Radon
Level (pCi/L)
Is Radon a Problem in this County?
HawaiiZone Three (Low)No DataRadon is a minor problem in Hawaii County
HonoluluZone Three (Low)No DataRadon is a minor problem in Honolulu County
KalawaoZone Three (Low)No DataRadon is a minor problem in Kalawao County
KauaiZone Three (Low)No DataRadon is a minor problem in Kauai County
MauiZone Three (Low)No DataRadon 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 NameEPA Zone Designation
(1=High, 2=Mid, 3=Low)
Average Radon
Level (pCi/L)
Is Radon a Problem in this County?
AdaZone Two (Mid)3.0Radon is a problem in Ada County
AdamsZone Three (Low)5.0Radon is a major problem in Adams County
BannockZone Two (Mid)5.5Radon is a major problem in Bannock County
Bear LakeZone Two (Mid)6.9Radon is a major problem in Bear Lake County
BenewahZone One (High)4.4Radon is a major problem in Benewah County
BinghamZone Two (Mid)5.0Radon is a major problem in Bingham County
BlaineZone One (High)8.5Radon is an extreme problem in Blaine County
BoiseZone One (High)3.3Radon is a major problem in Boise County
BonnerZone Two (Mid)5.1Radon is a major problem in Bonner County
BonnevilleZone Two (Mid)4.1Radon is a major problem in Bonneville County
BoundaryZone One (High)2.2Radon is a major problem in Boundary County
ButteZone One (High)18.4Radon is an extreme problem in Butte County
CamasZone One (High)5.6Radon is a major problem in Camas County
CanyonZone Two (Mid)1.9Radon is a problem in Canyon County
CaribouZone Two (Mid)4.7Radon is a major problem in Caribou County
CassiaZone Two (Mid)7.5Radon is a major problem in Cassia County
ClarkZone One (High)13.9Radon is an extreme problem in Clark County
ClearwaterZone One (High)2.9Radon is a major problem in Clearwater County
CusterZone One (High)8.8Radon is an extreme problem in Custer County
ElmoreZone One (High)7.8Radon is a major problem in Elmore County
FranklinZone Two (Mid)3.8Radon is a problem in Franklin County
FremontZone One (High)6.9Radon is a major problem in Fremont County
GemZone Three (Low)2.1Radon is a problem in Gem County
GoodingZone One (High)3.6Radon is a major problem in Gooding County
IdahoZone One (High)4.7Radon is a major problem in Idaho County
JeffersonZone Two (Mid)7.8Radon is a major problem in Jefferson County
JeromeZone Two (Mid)2.6Radon is a problem in Jerome County
KootenaiZone One (High)12.3Radon is an extreme problem in Kootenai County
LatahZone One (High)3.4Radon is a major problem in Latah County
LemhiZone One (High)7.5Radon is a major problem in Lemhi County
LewisZone Three (Low)13.0Radon is an extreme problem in Lewis County
LincolnZone Two (Mid)6.3Radon is a major problem in Lincoln County
MadisonZone Two (Mid)9.9Radon is an extreme problem in Madison County
MinidokaZone Two (Mid)2.8Radon is a problem in Minidoka County
Nez PerceZone Three (Low)3.4Radon is a problem in Nez Perce County
OneidaZone Two (Mid)6.4Radon is a major problem in Oneida County
OwyheeZone Two (Mid)3.0Radon is a problem in Owyhee County
PayetteZone Two (Mid)2.0Radon is a problem in Payette County
PowerZone Two (Mid)3.5Radon is a problem in Power County
ShoshoneZone One (High)11.2Radon is an extreme problem in Shoshone County
TetonZone Two (Mid)10.8Radon is an extreme problem in Teton County
Twin FallsZone Two (Mid)3.0Radon is a problem in Twin Falls County
ValleyZone One (High)3.1Radon is a major problem in Valley County
WashingtonZone Three (Low)3.4Radon 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 NameEPA Zone Designation
(1=High, 2=Mid, 3=Low)
Average Radon
Level (pCi/L)
Is Radon a Problem in this County?
AdamsZone One (High)7.5Radon is a major problem in Adams County
AlexanderZone Three (Low)2.6Radon is a problem in Alexander County
BondZone Two (Mid)4.3Radon is a major problem in Bond County
BooneZone One (High)4.4Radon is a major problem in Boone County
BrownZone One (High)5.6Radon is a major problem in Brown County
BureauZone One (High)6.4Radon is a major problem in Bureau County
CalhounZone One (High)3.7Radon is a major problem in Calhoun County
CarrollZone One (High)6.9Radon is a major problem in Carroll County
CassZone One (High)4.8Radon is a major problem in Cass County
ChampaignZone One (High)4.9Radon is a major problem in Champaign County
ChristianZone Two (Mid)6.7Radon is a major problem in Christian County
ClarkZone Two (Mid)2.7Radon is a problem in Clark County
ClayZone Two (Mid)2.1Radon is a problem in Clay County
ClintonZone Two (Mid)3.7Radon is a problem in Clinton County
ColesZone One (High)3.4Radon is a major problem in Coles County
CookZone Two (Mid)2.1Radon is a problem in Cook County
CrawfordZone Two (Mid)1.7Radon is a problem in Crawford County
CumberlandZone Two (Mid)2.5Radon is a problem in Cumberland County
DeKalbZone One (High)4.0Radon is a major problem in DeKalb County
DeWittZone One (High)7.9Radon is a major problem in DeWitt County
DouglasZone One (High)5.4Radon is a major problem in Douglas County
DuPageZone Two (Mid)4.1Radon is a major problem in DuPage County
EdgarZone One (High)2.2Radon is a major problem in Edgar County
EdwardsZone Two (Mid)2.8Radon is a problem in Edwards County
EffinghamZone Two (Mid)3.5Radon is a problem in Effingham County
FayetteZone Two (Mid)3.7Radon is a problem in Fayette County
FordZone One (High)5.3Radon is a major problem in Ford County
FranklinZone Two (Mid)2.4Radon is a problem in Franklin County
FultonZone One (High)7.9Radon is a major problem in Fulton County
GallatinZone Two (Mid)3.7Radon is a problem in Gallatin County
GreeneZone One (High)4.8Radon is a major problem in Greene County
GrundyZone One (High)7.2Radon is a major problem in Grundy County
HamiltonZone Two (Mid)2.5Radon is a problem in Hamilton County
HancockZone One (High)6.3Radon is a major problem in Hancock County
HardinZone Two (Mid)2.5Radon is a problem in Hardin County
HendersonZone One (High)6.7Radon is a major problem in Henderson County
HenryZone One (High)6.3Radon is a major problem in Henry County
IroquoisZone One (High)3.6Radon is a major problem in Iroquois County
JacksonZone Two (Mid)3.1Radon is a problem in Jackson County
JasperZone Two (Mid)2.7Radon is a problem in Jasper County
JeffersonZone Two (Mid)2.3Radon is a problem in Jefferson County
JerseyZone One (High)4.4Radon is a major problem in Jersey County
Jo DaviessZone One (High)7.7Radon is a major problem in Jo Daviess County
JohnsonZone Two (Mid)2.0Radon is a problem in Johnson County
KaneZone One (High)4.6Radon is a major problem in Kane County
KankakeeZone Two (Mid)4.2Radon is a major problem in Kankakee County
KendallZone One (High)6.0Radon is a major problem in Kendall County
KnoxZone One (High)8.2Radon is an extreme problem in Knox County
La SalleZone One (High)5.8Radon is a major problem in La Salle County
LakeZone Two (Mid)3.1Radon is a problem in Lake County
LawrenceZone Two (Mid)3.4Radon is a problem in Lawrence County
LeeZone One (High)4.3Radon is a major problem in Lee County
LivingstonZone One (High)8.8Radon is an extreme problem in Livingston County
LoganZone One (High)6.3Radon is a major problem in Logan County
McDonoughZone One (High)5.6Radon is a major problem in McDonough County
McHenryZone Two (Mid)4.0Radon is a major problem in McHenry County
McLeanZone One (High)5.6Radon is a major problem in McLean County
MaconZone One (High)4.6Radon is a major problem in Macon County
MacoupinZone Two (Mid)3.7Radon is a problem in Macoupin County
MadisonZone Two (Mid)4.1Radon is a major problem in Madison County
MarionZone Two (Mid)2.5Radon is a problem in Marion County
MarshallZone One (High)10.5Radon is an extreme problem in Marshall County
MasonZone One (High)5.6Radon is a major problem in Mason County
MassacZone Three (Low)1.8Radon is a minor problem in Massac County
MenardZone One (High)6.1Radon is a major problem in Menard County
MercerZone One (High)8.3Radon is an extreme problem in Mercer County
MonroeZone Two (Mid)4.7Radon is a major problem in Monroe County
MontgomeryZone Two (Mid)4.8Radon is a major problem in Montgomery County
MorganZone One (High)6.8Radon is a major problem in Morgan County
MoultrieZone One (High)6.5Radon is a major problem in Moultrie County
OgleZone One (High)7.3Radon is a major problem in Ogle County
PeoriaZone One (High)7.3Radon is a major problem in Peoria County
PerryZone Two (Mid)3.2Radon is a problem in Perry County
PiattZone One (High)5.2Radon is a major problem in Piatt County
PikeZone One (High)4.7Radon is a major problem in Pike County
PopeZone Two (Mid)2.4Radon is a problem in Pope County
PulaskiZone Three (Low)2.4Radon is a problem in Pulaski County
PutnamZone One (High)8.0Radon is an extreme problem in Putnam County
RandolphZone Two (Mid)4.5Radon is a major problem in Randolph County
RichlandZone Two (Mid)2.8Radon is a problem in Richland County
Rock IslandZone One (High)5.0Radon is a major problem in Rock Island County
SalineZone Two (Mid)2.2Radon is a problem in Saline County
SangamonZone One (High)3.9Radon is a major problem in Sangamon County
SchuylerZone One (High)5.8Radon is a major problem in Schuyler County
ScottZone One (High)12.0Radon is an extreme problem in Scott County
ShelbyZone Two (Mid)4.2Radon is a major problem in Shelby County
Saint Clair
(St. Clair)
Zone Two (Mid)4.4Radon is a major problem in Saint Clair County
StarkZone One (High)11.1Radon is an extreme problem in Stark County
StephensonZone One (High)6.3Radon is a major problem in Stephenson County
TazewellZone One (High)7.8Radon is a major problem in Tazewell County
UnionZone Two (Mid)2.8Radon is a problem in Union County
VermilionZone One (High)4.6Radon is a major problem in Vermilion County
WabashZone Two (Mid)3.6Radon is a problem in Wabash County
WarrenZone One (High)10.2Radon is an extreme problem in Warren County
WashingtonZone Two (Mid)3.2Radon is a problem in Washington County
WayneZone Two (Mid)2.0Radon is a problem in Wayne County
WhiteZone Two (Mid)2.5Radon is a problem in White County
WhitesideZone One (High)5.0Radon is a major problem in Whiteside County
WillZone Two (Mid)5.0Radon is a major problem in Will County
WilliamsonZone Two (Mid)1.9Radon is a problem in Williamson County
WinnebagoZone One (High)3.9Radon is a major problem in Winnebago County
WoodfordZone One (High)8.1Radon is an extreme problem in Woodford County

Is Radon a Problem in Indiana?

County NameEPA Zone Designation
(1=High, 2=Mid, 3=Low)
Average Radon
Level (pCi/L)
Is Radon a Problem in this County?
AdamsZone One (High)4.3Radon is a major problem in Adams County
AllenZone One (High)4.6Radon is a major problem in Allen County
BartholomewZone One (High)3.5Radon is a major problem in Bartholomew County
BentonZone One (High)6.0Radon is a major problem in Benton County
BlackfordZone One (High)3.1Radon is a major problem in Blackford County
BooneZone One (High)3.7Radon is a major problem in Boone County
BrownZone Two (Mid)2.7Radon is a problem in Brown County
CarrollZone One (High)5.6Radon is a major problem in Carroll County
CassZone One (High)5.1Radon is a major problem in Cass County
ClarkZone One (High)6.2Radon is a major problem in Clark County
ClayZone Two (Mid)3.5Radon is a problem in Clay County
ClintonZone One (High)4.7Radon is a major problem in Clinton County
CrawfordZone Two (Mid)4.0Radon is a major problem in Crawford County
DaviessZone Two (Mid)3.0Radon is a problem in Daviess County
DearbornZone Two (Mid)3.5Radon is a problem in Dearborn County
DecaturZone One (High)4.9Radon is a major problem in Decatur County
DeKalbZone One (High)5.1Radon is a major problem in DeKalb County
DelawareZone One (High)3.4Radon is a major problem in Delaware County
DuboisZone Two (Mid)4.4Radon is a major problem in Dubois County
ElkhartZone One (High)4.3Radon is a major problem in Elkhart County
FayetteZone One (High)5.9Radon is a major problem in Fayette County
FloydZone Two (Mid)5.1Radon is a major problem in Floyd County
FountainZone One (High)9.6Radon is an extreme problem in Fountain County
FranklinZone Two (Mid)2.7Radon is a problem in Franklin County
FultonZone One (High)8.3Radon is an extreme problem in Fulton County
GibsonZone Two (Mid)4.2Radon is a major problem in Gibson County
GrantZone One (High)5.0Radon is a major problem in Grant County
GreeneZone Two (Mid)2.3Radon is a problem in Greene County
HamiltonZone One (High)3.2Radon is a major problem in Hamilton County
HancockZone One (High)2.4Radon is a major problem in Hancock County
HarrisonZone One (High)7.8Radon is a major problem in Harrison County
HendricksZone One (High)2.8Radon is a major problem in Hendricks County
HenryZone One (High)6.9Radon is a major problem in Henry County
HowardZone One (High)4.4Radon is a major problem in Howard County
HuntingtonZone One (High)4.6Radon is a major problem in Huntington County
JacksonZone Two (Mid)2.8Radon is a problem in Jackson County
JasperZone Two (Mid)2.3Radon is a problem in Jasper County
JayZone One (High)4.3Radon is a major problem in Jay County
JeffersonZone Two (Mid)7.7Radon is a major problem in Jefferson County
JenningsZone One (High)4.6Radon is a major problem in Jennings County
JohnsonZone One (High)2.8Radon is a major problem in Johnson County
KnoxZone Two (Mid)3.3Radon is a problem in Knox County
KosciuskoZone One (High)4.4Radon is a major problem in Kosciusko County
LaPorteZone Two (Mid)7.3Radon is a major problem in LaPorte County
LaGrangeZone One (High)5.5Radon is a major problem in LaGrange County
LakeZone Two (Mid)2.0Radon is a problem in Lake County
LawrenceZone One (High)4.9Radon is a major problem in Lawrence County
MadisonZone One (High)4.5Radon is a major problem in Madison County
MarionZone One (High)3.7Radon is a major problem in Marion County
MarshallZone One (High)6.9Radon is a major problem in Marshall County
MartinZone Two (Mid)4.6Radon is a major problem in Martin County
MiamiZone One (High)6.6Radon is a major problem in Miami County
MonroeZone One (High)3.9Radon is a major problem in Monroe County
MontgomeryZone One (High)3.7Radon is a major problem in Montgomery County
MorganZone Two (Mid)3.8Radon is a problem in Morgan County
NewtonZone Two (Mid)2.4Radon is a problem in Newton County
NobleZone One (High)7.3Radon is a major problem in Noble County
OhioZone Two (Mid)3.7Radon is a problem in Ohio County
OrangeZone One (High)5.4Radon is a major problem in Orange County
OwenZone Two (Mid)3.6Radon is a problem in Owen County
ParkeZone Two (Mid)4.8Radon is a major problem in Parke County
PerryZone Two (Mid)1.5Radon is a problem in Perry County
PikeZone Two (Mid)2.3Radon is a problem in Pike County
PorterZone Two (Mid)5.7Radon is a major problem in Porter County
PoseyZone Two (Mid)3.6Radon is a problem in Posey County
PulaskiZone Two (Mid)3.3Radon is a problem in Pulaski County
PutnamZone One (High)4.2Radon is a major problem in Putnam County
RandolphZone One (High)3.8Radon is a major problem in Randolph County
RipleyZone Two (Mid)3.1Radon is a problem in Ripley County
RushZone One (High)6.8Radon is a major problem in Rush County
Saint Joseph
(St. Joseph)
Zone One (High)3.4Radon is a major problem in Saint Joseph County
ScottZone One (High)3.1Radon is a major problem in Scott County
ShelbyZone One (High)5.9Radon is a major problem in Shelby County
SpencerZone Two (Mid)5.0Radon is a major problem in Spencer County
StarkeZone Two (Mid)2.3Radon is a problem in Starke County
SteubenZone One (High)5.3Radon is a major problem in Steuben County
SullivanZone Two (Mid)3.5Radon is a problem in Sullivan County
SwitzerlandZone Two (Mid)1.7Radon is a problem in Switzerland County
TippecanoeZone One (High)4.3Radon is a major problem in Tippecanoe County
TiptonZone One (High)3.8Radon is a major problem in Tipton County
UnionZone One (High)6.3Radon is a major problem in Union County
Vanderburgh Zone Two (Mid)2.5Radon is a problem in Vanderburgh County
VermillionZone One (High)7.2Radon is a major problem in Vermillion County
VigoZone Two (Mid)3.7Radon is a problem in Vigo County
WabashZone One (High)5.1Radon is a major problem in Wabash County
WarrenZone One (High)4.3Radon is a major problem in Warren County
WarrickZone Two (Mid)1.9Radon is a problem in Warrick County
WashingtonZone One (High)4.9Radon is a major problem in Washington County
WayneZone One (High)4.9Radon is a major problem in Wayne County
WellsZone One (High)5.1Radon is a major problem in Wells County
WhiteZone One (High)3.4Radon is a major problem in White County
WhitleyZone One (High)5.8Radon is a major problem in Whitley County

Is Radon a Problem in Iowa?

County NameEPA Zone Designation
(1=High, 2=Mid, 3=Low)
Average Radon
Level (pCi/L)
Is Radon a Problem in this County?
AdairZone One (High)8.9Radon is an extreme problem in Adair County
AdamsZone One (High)5.9Radon is a major problem in Adams County
AllamakeeZone One (High)8.0Radon is an extreme problem in Allamakee County
AppanooseZone One (High)4.0Radon is a major problem in Appanoose County
AudubonZone One (High)9.5Radon is an extreme problem in Audubon County
BentonZone One (High)7.4Radon is a major problem in Benton County
Black HawkZone One (High)3.9Radon is a major problem in Black Hawk County
BooneZone One (High)6.7Radon is a major problem in Boone County
BremerZone One (High)4.7Radon is a major problem in Bremer County
BuchananZone One (High)7.6Radon is a major problem in Buchanan County
Buena VistaZone One (High)9.2Radon is an extreme problem in Buena Vista County
ButlerZone One (High)5.9Radon is a major problem in Butler County
CalhounZone One (High)6.5Radon is a major problem in Calhoun County
CarrollZone One (High)10.1Radon is an extreme problem in Carroll County
CassZone One (High)8.1Radon is an extreme problem in Cass County
CedarZone One (High)5.9Radon is a major problem in Cedar County
Cerro GordoZone One (High)5.6Radon is a major problem in Cerro Gordo County
CherokeeZone One (High)9.1Radon is an extreme problem in Cherokee County
ChickasawZone One (High)6.7Radon is a major problem in Chickasaw County
ClarkeZone One (High)3.6Radon is a major problem in Clarke County
ClayZone One (High)10.2Radon is an extreme problem in Clay County
ClaytonZone One (High)6.2Radon is a major problem in Clayton County
ClintonZone One (High)5.6Radon is a major problem in Clinton County
CrawfordZone One (High)9.3Radon is an extreme problem in Crawford County
DallasZone One (High)5.3Radon is a major problem in Dallas County
DavisZone One (High)4.1Radon is a major problem in Davis County
DecaturZone One (High)2.8Radon is a major problem in Decatur County
DelawareZone One (High)6.3Radon is a major problem in Delaware County
Des MoinesZone One (High)3.9Radon is a major problem in Des Moines County
DickinsonZone One (High)8.6Radon is an extreme problem in Dickinson County
DubuqueZone One (High)4.7Radon is a major problem in Dubuque County
EmmetZone One (High)6.9Radon is a major problem in Emmet County
FayetteZone One (High)6.7Radon is a major problem in Fayette County
FloydZone One (High)6.4Radon is a major problem in Floyd County
FranklinZone One (High)6.0Radon is a major problem in Franklin County
FremontZone One (High)8.9Radon is an extreme problem in Fremont County
GreeneZone One (High)7.4Radon is a major problem in Greene County
Grundy Zone One (High)7.8Radon is a major problem in Grundy County
GuthrieZone One (High)8.7Radon is an extreme problem in Guthrie County
HamiltonZone One (High)4.9Radon is a major problem in Hamilton County
HancockZone One (High)8.2Radon is an extreme problem in Hancock County
HardinZone One (High)6.3Radon is a major problem in Hardin County
HarrisonZone One (High)6.8Radon is a major problem in Harrison County
HenryZone One (High)5.0Radon is a major problem in Henry County
HowardZone One (High)7.4Radon is a major problem in Howard County
HumboldtZone One (High)7.0Radon is a major problem in Humboldt County
IdaZone One (High)9.5Radon is an extreme problem in Ida County
IowaZone One (High)5.8Radon is a major problem in Iowa County
JacksonZone One (High)6.0Radon is a major problem in Jackson County
JasperZone One (High)8.2Radon is an extreme problem in Jasper County
JeffersonZone One (High)5.4Radon is a major problem in Jefferson County
JohnsonZone One (High)4.2Radon is a major problem in Johnson County
JonesZone One (High)6.1Radon is a major problem in Jones County
KeokukZone One (High)6.2Radon is a major problem in Keokuk County
KossuthZone One (High)6.3Radon is a major problem in Kossuth County
LeeZone One (High)4.4Radon is a major problem in Lee County
LinnZone One (High)4.1Radon is a major problem in Linn County
LouisaZone One (High)4.5Radon is a major problem in Louisa County
LucasZone One (High)4.9Radon is a major problem in Lucas County
LyonZone One (High)9.3Radon is an extreme problem in Lyon County
MadisonZone One (High)7.1Radon is a major problem in Madison County
MahaskaZone One (High)5.6Radon is a major problem in Mahaska County
MarionZone One (High)6.7Radon is a major problem in Marion County
MarshallZone One (High)6.8Radon is a major problem in Marshall County
MillsZone One (High)6.1Radon is a major problem in Mills County
MitchellZone One (High)7.7Radon is a major problem in Mitchell County
MononaZone One (High)8.5Radon is an extreme problem in Monona County
MonroeZone One (High)2.8Radon is a major problem in Monroe County
MontgomeryZone One (High)8.1Radon is an extreme problem in Montgomery County
MuscatineZone One (High)4.7Radon is a major problem in Muscatine County
O’BrienZone One (High)9.2Radon is an extreme problem in O’Brien County
OsceolaZone One (High)7.6Radon is a major problem in Osceola County
PageZone One (High)8.8Radon is an extreme problem in Page County
Palo AltoZone One (High)7.0Radon is a major problem in Palo Alto County
PlymouthZone One (High)9.0Radon is an extreme problem in Plymouth County
PocahontasZone One (High)8.8Radon is an extreme problem in Pocahontas County
PolkZone One (High)5.2Radon is a major problem in Polk County
PottawattamieZone One (High)5.4Radon is a major problem in Pottawattamie County
PoweshiekZone One (High)7.1Radon is a major problem in Poweshiek County
RinggoldZone One (High)3.8Radon is a major problem in Ringgold County
SacZone One (High)9.0Radon is an extreme problem in Sac County
ScottZone One (High)4.4Radon is a major problem in Scott County
ShelbyZone One (High)9.8Radon is an extreme problem in Shelby County
SiouxZone One (High)10.7Radon is an extreme problem in Sioux County
StoryZone One (High)4.8Radon is a major problem in Story County
TamaZone One (High)6.2Radon is a major problem in Tama County
TaylorZone One (High)6.1Radon is a major problem in Taylor County
UnionZone One (High)5.5Radon is a major problem in Union County
Van BurenZone One (High)2.9Radon is a major problem in Van Buren County
WapelloZone One (High)3.5Radon is a major problem in Wapello County
WarrenZone One (High)7.1Radon is a major problem in Warren County
WashingtonZone One (High)6.6Radon is a major problem in Washington County
WayneZone One (High)3.6Radon is a major problem in Wayne County
WebsterZone One (High)7.0Radon is a major problem in Webster County
WinnebagoZone One (High)7.8Radon is a major problem in Winnebago County
WinneshiekZone One (High)8.0Radon is an extreme problem in Winneshiek County
WoodburyZone One (High)6.7Radon is a major problem in Woodbury County
WorthZone One (High)6.0Radon is a major problem in Worth County
WrightZone One (High)7.4Radon is a major problem in Wright County

Is Radon a Problem in Kansas?

County NameEPA Zone Designation
(1=High, 2=Mid, 3=Low)
Average Radon
Level (pCi/L)
Is Radon a Problem in this County?
AllenZone Two (Mid)2.8Radon is a problem in Allen County
AndersonZone Two (Mid)4.9Radon is a major problem in Anderson County
AtchisonZone One (High)5.3Radon is a major problem in Atchison County
BarberZone Two (Mid)4.3Radon is a major problem in Barber County
BartonZone One (High)4.9Radon is a major problem in Barton County
BourbonZone Two (Mid)6.1Radon is a major problem in Bourbon County
BrownZone One (High)5.6Radon is a major problem in Brown County
ButlerZone Two (Mid)4.6Radon is a major problem in Butler County
ChaseZone Two (Mid)4.7Radon is a major problem in Chase County
ChautauquaZone Two (Mid)1.0Radon is a problem in Chautauqua County
CherokeeZone Two (Mid)4.8Radon is a major problem in Cherokee County
CheyenneZone One (High)4.7Radon is a major problem in Cheyenne County
ClarkZone Two (Mid)5.6Radon is a major problem in Clark County
ClayZone One (High)6.4Radon is a major problem in Clay County
CloudZone One (High)6.6Radon is a major problem in Cloud County
CoffeyZone Two (Mid)3.7Radon is a problem in Coffey County
ComancheZone Two (Mid)4.0Radon is a major problem in Comanche County
CowleyZone Two (Mid)5.6Radon is a major problem in Cowley County
CrawfordZone Two (Mid)4.7Radon is a major problem in Crawford County
DecaturZone One (High)5.5Radon is a major problem in Decatur County
DickinsonZone One (High)5.6Radon is a major problem in Dickinson County
DoniphanZone Two (Mid)6.7Radon is a major problem in Doniphan County
DouglasZone One (High)4.0Radon is a major problem in Douglas County
EdwardsZone Two (Mid)3.8Radon is a problem in Edwards County
ElkZone Two (Mid)2.4Radon is a problem in Elk County
EllisZone One (High)5.9Radon is a major problem in Ellis County
EllsworthZone One (High)13.8Radon is an extreme problem in Ellsworth County
FinneyZone One (High)4.3Radon is a major problem in Finney County
FordZone One (High)4.9Radon is a major problem in Ford County
FranklinZone Two (Mid)5.0Radon is a major problem in Franklin County
GearyZone One (High)5.2Radon is a major problem in Geary County
GoveZone One (High)6.7Radon is a major problem in Gove County
GrahamZone One (High)5.2Radon is a major problem in Graham County
GrantZone One (High)3.8Radon is a major problem in Grant County
GrayZone One (High)5.8Radon is a major problem in Gray County
GreeleyZone One (High)6.5Radon is a major problem in Greeley County
GreenwoodZone Two (Mid)4.0Radon is a major problem in Greenwood County
HamiltonZone One (High)4.5Radon is a major problem in Hamilton County
HarperZone Two (Mid)3.1Radon is a problem in Harper County
HarveyZone Two (Mid)4.3Radon is a major problem in Harvey County
HaskellZone One (High)5.2Radon is a major problem in Haskell County
HodgemanZone One (High)5.1Radon is a major problem in Hodgeman County
JacksonZone One (High)2.5Radon is a major problem in Jackson County
JeffersonZone Two (Mid)4.5Radon is a major problem in Jefferson County
JewellZone One (High)9.7Radon is an extreme problem in Jewell County
JohnsonZone One (High)5.6Radon is a major problem in Johnson County
KearnyZone One (High)5.0Radon is a major problem in Kearny County
KingmanZone One (High)2.8Radon is a major problem in Kingman County
KiowaZone One (High)6.2Radon is a major problem in Kiowa County
LabetteZone Two (Mid)2.6Radon is a problem in Labette County
LaneZone One (High)5.8Radon is a major problem in Lane County
LeavenworthZone One (High)4.2Radon is a major problem in Leavenworth County
LincolnZone One (High)6.1Radon is a major problem in Lincoln County
LinnZone Two (Mid)5.9Radon is a major problem in Linn County
LoganZone One (High)5.3Radon is a major problem in Logan County
LyonZone Two (Mid)5.0Radon is a major problem in Lyon County
MarionZone One (High)5.5Radon is a major problem in Marion County
MarshallZone One (High)7.5Radon is a major problem in Marshall County
McPhersonZone One (High)6.0Radon is a major problem in McPherson County
MeadeZone One (High)6.2Radon is a major problem in Meade County
MiamiZone Two (Mid)6.4Radon is a major problem in Miami County
MitchellZone One (High)7.9Radon is a major problem in Mitchell County
MontgomeryZone Two (Mid)2.0Radon is a problem in Montgomery County
MorrisZone Two (Mid)3.4Radon is a problem in Morris County
MortonZone Two (Mid)3.3Radon is a problem in Morton County
NemahaZone One (High)6.9Radon is a major problem in Nemaha County
NeoshoZone Two (Mid)2.1Radon is a problem in Neosho County
NessZone One (High)7.3Radon is a major problem in Ness County
NortonZone One (High)5.7Radon is a major problem in Norton County
OsageZone Two (Mid)4.8Radon is a major problem in Osage County
OsborneZone One (High)5.9Radon is a major problem in Osborne County
OttawaZone One (High)5.9Radon is a major problem in Ottawa County
PawneeZone One (High)5.7Radon is a major problem in Pawnee County
PhillipsZone One (High)6.0Radon is a major problem in Phillips County
PottawatomieZone One (High)5.7Radon is a major problem in Pottawatomie County
PrattZone One (High)3.4Radon is a major problem in Pratt County
RawlinsZone One (High)6.7Radon is a major problem in Rawlins County
RenoZone Two (Mid)3.5Radon is a problem in Reno County
RepublicZone One (High)7.8Radon is a major problem in Republic County
RiceZone One (High)4.6Radon is a major problem in Rice County
RileyZone One (High)5.6Radon is a major problem in Riley County
RooksZone One (High)6.9Radon is a major problem in Rooks County
RushZone One (High)7.6Radon is a major problem in Rush County
RussellZone One (High)6.8Radon is a major problem in Russell County
SalineZone One (High)5.8Radon is a major problem in Saline County
ScottZone One (High)7.6Radon is a major problem in Scott County
SedgwickZone Two (Mid)3.2Radon is a problem in Sedgwick County
SewardZone Two (Mid)2.4Radon is a problem in Seward County
ShawneeZone Two (Mid)4.7Radon is a major problem in Shawnee County
SheridanZone One (High)6.4Radon is a major problem in Sheridan County
ShermanZone One (High)5.1Radon is a major problem in Sherman County
SmithZone One (High)6.8Radon is a major problem in Smith County
StaffordZone Two (Mid)4.5Radon is a major problem in Stafford County
StantonZone One (High)6.9Radon is a major problem in Stanton County
StevensZone Two (Mid)5.5Radon is a major problem in Stevens County
SumnerZone Two (Mid)4.4Radon is a major problem in Sumner County
ThomasZone One (High)5.5Radon is a major problem in Thomas County
TregoZone One (High)6.5Radon is a major problem in Trego County
WabaunseeZone Two (Mid)5.6Radon is a major problem in Wabaunsee County
WallaceZone One (High)5.5Radon is a major problem in Wallace County
WashingtonZone One (High)7.3Radon is a major problem in Washington County
WichitaZone One (High)6.6Radon is a major problem in Wichita County
WilsonZone Two (Mid)3.8Radon is a problem in Wilson County
WoodsonZone Two (Mid)1.6Radon is a problem in Woodson County
WyandotteZone One (High)4.6Radon is a major problem in Wyandotte County

Is Radon a Problem in Kentucky?

County NameEPA Zone Designation
(1=High, 2=Mid, 3=Low)
Average Radon
Level (pCi/L)
Is Radon a Problem in this County?
AdairZone One (High)3.0Radon is a major problem in Adair County
AllenZone One (High)3.2Radon is a major problem in Allen County
AndersonZone Two (Mid)2.4Radon is a problem in Anderson County
BallardZone Three (Low)1.5Radon is a minor problem in Ballard County
BarrenZone One (High)6.0Radon is a major problem in Barren County
BathZone Two (Mid)1.9Radon is a problem in Bath County
BellZone Two (Mid)1.0Radon is a problem in Bell County
BooneZone Two (Mid)3.8Radon is a problem in Boone County
BourbonZone One (High)7.0Radon is a major problem in Bourbon County
BoydZone Two (Mid)3.7Radon is a problem in Boyd County
BoyleZone One (High)5.3Radon is a major problem in Boyle County
BrackenZone Two (Mid)1.5Radon is a problem in Bracken County
BreathittZone Two (Mid)2.4Radon is a problem in Breathitt County
BreckinridgeZone Two (Mid)7.4Radon is a major problem in Breckinridge County
BullittZone One (High)6.3Radon is a major problem in Bullitt County
ButlerZone Two (Mid)2.1Radon is a problem in Butler County
CaldwellZone Two (Mid)4.9Radon is a major problem in Caldwell County
CallowayZone Three (Low)1.4Radon is a minor problem in Calloway County
CampbellZone Two (Mid)2.6Radon is a problem in Campbell County
CarlisleZone Three (Low)0.8Radon is a minor problem in Carlisle County
CarrollZone Two (Mid)2.3Radon is a problem in Carroll County
CarterZone Two (Mid)3.0Radon is a problem in Carter County
CaseyZone One (High)4.3Radon is a major problem in Casey County
ChristianZone Two (Mid)5.3Radon is a major problem in Christian County
ClarkZone One (High)3.4Radon is a major problem in Clark County
ClayZone Two (Mid)1.9Radon is a problem in Clay County
ClintonZone Two (Mid)5.4Radon is a major problem in Clinton County
CrittendenZone Two (Mid)1.7Radon is a problem in Crittenden County
CumberlandZone One (High)5.5Radon is a major problem in Cumberland County
DaviessZone Two (Mid)2.6Radon is a problem in Daviess County
EdmonsonZone Two (Mid)1.5Radon is a problem in Edmonson County
ElliottZone Two (Mid)4.5Radon is a major problem in Elliott County
EstillZone Two (Mid)7.5Radon is a major problem in Estill County
FayetteZone One (High)7.7Radon is a major problem in Fayette County
FlemingZone Two (Mid)1.5Radon is a problem in Fleming County
FloydZone Two (Mid)2.5Radon is a problem in Floyd County
FranklinZone One (High)4.8Radon is a major problem in Franklin County
FultonZone Three (Low)2.1Radon is a problem in Fulton County
GallatinZone Two (Mid)3.9Radon is a problem in Gallatin County
GarrardZone Two (Mid)3.4Radon is a problem in Garrard County
GrantZone Two (Mid)2.6Radon is a problem in Grant County
GravesZone Three (Low)1.6Radon is a minor problem in Graves County
GraysonZone Two (Mid)3.9Radon is a problem in Grayson County
GreenZone One (High)5.1Radon is a major problem in Green County
GreenupZone Two (Mid)3.2Radon is a problem in Greenup County
HancockZone Two (Mid)2.8Radon is a problem in Hancock County
HardinZone Two (Mid)6.4Radon is a major problem in Hardin County
HarlanZone Two (Mid)2.7Radon is a problem in Harlan County
HarrisonZone One (High)4.0Radon is a major problem in Harrison County
HartZone One (High)20.0Radon is an extreme problem in Hart County
HendersonZone Two (Mid)2.1Radon is a problem in Henderson County
HenryZone Two (Mid)2.8Radon is a problem in Henry County
HickmanZone Three (Low)0.8Radon is a minor problem in Hickman County
HopkinsZone Two (Mid)3.4Radon is a problem in Hopkins County
JacksonZone Two (Mid)3.4Radon is a problem in Jackson County
JeffersonZone One (High)6.4Radon is a major problem in Jefferson County
JessamineZone One (High)7.1Radon is a major problem in Jessamine County
JohnsonZone Two (Mid)1.3Radon is a problem in Johnson County
KentonZone Two (Mid)2.7Radon is a problem in Kenton County
KnottZone Two (Mid)2.5Radon is a problem in Knott County
KnoxZone Two (Mid)1.8Radon is a problem in Knox County
LaRueZone Two (Mid)4.4Radon is a major problem in LaRue County
LaurelZone Two (Mid)2.6Radon is a problem in Laurel County
LawrenceZone Two (Mid)2.7Radon is a problem in Lawrence County
LeeZone Two (Mid)2.1Radon is a problem in Lee County
LeslieZone Two (Mid)1.2Radon is a problem in Leslie County
LetcherZone Two (Mid)2.1Radon is a problem in Letcher County
LewisZone Two (Mid)6.3Radon is a major problem in Lewis County
LincolnZone One (High)8.0Radon is an extreme problem in Lincoln County
LivingstonZone Two (Mid)1.2Radon is a problem in Livingston County
LoganZone Two (Mid)4.8Radon is a major problem in Logan County
LyonZone Two (Mid)1.7Radon is a problem in Lyon County
McCrackenZone Three (Low)1.9Radon is a minor problem in McCracken County
McCrearyZone Two (Mid)1.5Radon is a problem in McCreary County
McLeanZone Two (Mid)2.7Radon is a problem in McLean County
MadisonZone Two (Mid)5.4Radon is a major problem in Madison County
MagoffinZone Two (Mid)1.5Radon is a problem in Magoffin County
MarionZone One (High)9.8Radon is an extreme problem in Marion County
MarshallZone Three (Low)2.1Radon is a problem in Marshall County
MartinZone Two (Mid)1.1Radon is a problem in Martin County
MasonZone Two (Mid)2.5Radon is a problem in Mason County
MeadeZone Two (Mid)13.5Radon is an extreme problem in Meade County
MenifeeZone Two (Mid)2.5Radon is a problem in Menifee County
MercerZone One (High)4.9Radon is a major problem in Mercer County
MetcalfeZone One (High)2.9Radon is a major problem in Metcalfe County
MonroeZone One (High)4.1Radon is a major problem in Monroe County
MontgomeryZone Two (Mid)4.9Radon is a major problem in Montgomery County
MorganZone Two (Mid)1.7Radon is a problem in Morgan County
MuhlenbergZone Two (Mid)2.7Radon is a problem in Muhlenberg County
NelsonZone One (High)11.2Radon is an extreme problem in Nelson County
NicholasZone Two (Mid)2.3Radon is a problem in Nicholas County
OhioZone Two (Mid)2.2Radon is a problem in Ohio County
OldhamZone Two (Mid)3.8Radon is a problem in Oldham County
OwenZone Two (Mid)3.3Radon is a problem in Owen County
OwsleyZone Two (Mid)10.4Radon is an extreme problem in Owsley County
PendletonZone One (High)3.1Radon is a major problem in Pendleton County
PerryZone Two (Mid)2.4Radon is a problem in Perry County
PikeZone Two (Mid)2.0Radon is a problem in Pike County
PowellZone Two (Mid)4.7Radon is a major problem in Powell County
PulaskiZone One (High)7.6Radon is a major problem in Pulaski County
RobertsonZone One (High)0.8Radon is a major problem in Robertson County
RockcastleZone Two (Mid)4.4Radon is a major problem in Rockcastle County
RowanZone Two (Mid)2.0Radon is a problem in Rowan County
RussellZone One (High)2.2Radon is a major problem in Russell County
ScottZone One (High)6.7Radon is a major problem in Scott County
ShelbyZone Two (Mid)3.3Radon is a problem in Shelby County
SimpsonZone Two (Mid)4.4Radon is a major problem in Simpson County
SpencerZone Two (Mid)3.2Radon is a problem in Spencer County
TaylorZone One (High)5.8Radon is a major problem in Taylor County
ToddZone Two (Mid)4.0Radon is a major problem in Todd County
TriggZone Two (Mid)3.0Radon is a problem in Trigg County
TrimbleZone Two (Mid)3.0Radon is a problem in Trimble County
UnionZone Two (Mid)2.9Radon is a problem in Union County
WarrenZone One (High)13.9Radon is an extreme problem in Warren County
WashingtonZone Two (Mid)2.2Radon is a problem in Washington County
WayneZone Two (Mid)14.1Radon is an extreme problem in Wayne County
WebsterZone Two (Mid)3.9Radon is a problem in Webster County
WhitleyZone Two (Mid)1.3Radon is a problem in Whitley County
WolfeZone Two (Mid)1.1Radon is a problem in Wolfe County
WoodfordZone One (High)7.4Radon is a major problem in Woodford County

Is Radon a Problem in Louisiana?

Parish NameEPA Zone Designation
(1=High, 2=Mid, 3=Low)
Average Radon
Level (pCi/L)
Is Radon a Problem in this County?
AcadiaZone Three (Low)3.3Radon is a problem in Acadia Parish
AllenZone Three (Low)No DataRadon is a minor problem in Allen Parish
AscensionZone Three (Low)0.4Radon is a minor problem in Ascension Parish
AssumptionZone Three (Low)No DataRadon is a minor problem in Assumption Parish
AvoyellesZone Three (Low)0.8Radon is a minor problem in Avoyelles Parish
BeauregardZone Three (Low)0.6Radon is a minor problem in Beauregard Parish
BienvilleZone Three (Low)No DataRadon is a minor problem in Bienville Parish
BossierZone Three (Low)1.4Radon is a minor problem in Bossier Parish
CaddoZone Three (Low)1.3Radon is a minor problem in Caddo Parish
CalcasieuZone Three (Low)0.2Radon is a minor problem in Calcasieu Parish
CaldwellZone Three (Low)No DataRadon is a minor problem in Caldwell Parish
CameronZone Three (Low)No DataRadon is a minor problem in Cameron Parish
CatahoulaZone Three (Low)No DataRadon is a minor problem in Catahoula Parish
ClaiborneZone Three (Low)No DataRadon is a minor problem in Claiborne Parish
ConcordiaZone Three (Low)2.6Radon is a problem in Concordia Parish
De SotoZone Three (Low)1.3Radon is a minor problem in De Soto Parish
East Baton RougeZone Three (Low)0.4Radon is a minor problem in East Baton Rouge Parish
East CarrollZone Three (Low)No DataRadon is a minor problem in East Carroll Parish
East FelicianaZone Three (Low)7.9Radon is a major problem in East Feliciana Parish
EvangelineZone Three (Low)1.9Radon is a minor problem in Evangeline Parish
FranklinZone Three (Low)3.3Radon is a problem in Franklin Parish
GrantZone Three (Low)0.8Radon is a minor problem in Grant Parish
IberiaZone Three (Low)0.9Radon is a minor problem in Iberia Parish
IbervilleZone Three (Low)0.1Radon is a minor problem in Iberville Parish
JacksonZone Three (Low)No DataRadon is a minor problem in Jackson Parish
JeffersonZone Three (Low)1.2Radon is a minor problem in Jefferson Parish
Jefferson DavisZone Three (Low)0.3Radon is a minor problem in Jefferson Davis Parish
La SalleZone Three (Low)0.6Radon is a minor problem in La Salle Parish
LafayetteZone Three (Low)2.6Radon is a problem in Lafayette Parish
LafourcheZone Three (Low)0.6Radon is a minor problem in Lafourche Parish
LincolnZone Three (Low)0.4Radon is a minor problem in Lincoln Parish
LivingstonZone Three (Low)1.1Radon is a minor problem in Livingston Parish
MadisonZone Three (Low)No DataRadon is a minor problem in Madison Parish
MorehouseZone Three (Low)2.0Radon is a problem in Morehouse Parish
NatchitochesZone Three (Low)0.5Radon is a minor problem in Natchitoches Parish
OrleansZone Three (Low)0.2Radon is a minor problem in Orleans Parish
OuachitaZone Three (Low)1.1Radon is a minor problem in Ouachita Parish
PlaqueminesZone Three (Low)0.7Radon is a minor problem in Plaquemines Parish
Pointe CoupeeZone Three (Low)No DataRadon is a minor problem in Pointe Coupee Parish
RapidesZone Three (Low)0.6Radon is a minor problem in Rapides Parish
Red RiverZone Three (Low)No DataRadon is a minor problem in Red River Parish
RichlandZone Three (Low)0.9Radon is a minor problem in Richland Parish
SabineZone Three (Low)0.3Radon is a minor problem in Sabine Parish
Saint Bernard
(St. Bernard)
Zone Three (Low)0.4Radon is a minor problem in Saint Bernard Parish
Saint Charles
(St. Charles)
Zone Three (Low)0.4Radon is a minor problem in Saint Charles Parish
Saint Helena
(St. Helena)
Zone Three (Low)No DataRadon is a minor problem in Saint Helena Parish
Saint James
(St. James)
Zone Three (Low)0.1Radon is a minor problem in Saint James Parish
Saint John The Baptist
(St. John The Baptist)
Zone Three (Low)8.5Radon is an extreme problem in Saint John The Baptist Parish
Saint Landry
(St. Landry)
Zone Three (Low)0.9Radon is a minor problem in Saint Landry Parish
Saint Martin
(St. Martin)
Zone Three (Low)1.7Radon is a minor problem in Saint Martin Parish
Saint Mary
(St. Mary)
Zone Three (Low)0.2Radon is a minor problem in Saint Mary Parish
Saint Tammany
(St. Tammany)
Zone Three (Low)0.3Radon is a minor problem in Saint Tammany Parish
TangipahoaZone Three (Low)0.1Radon is a minor problem in Tangipahoa Parish
TensasZone Three (Low)No DataRadon is a minor problem in Tensas Parish
TerrebonneZone Three (Low)0.5Radon is a minor problem in Terrebonne Parish
UnionZone Three (Low)No DataRadon is a minor problem in Union Parish
VermilionZone Three (Low)0.3Radon is a minor problem in Vermilion Parish
VernonZone Three (Low)0.4Radon is a minor problem in Vernon Parish
WashingtonZone Three (Low)0.6Radon is a minor problem in Washington Parish
WebsterZone Three (Low)0.3Radon is a minor problem in Webster Parish
West Baton RougeZone Three (Low)No DataRadon is a minor problem in West Baton Rouge Parish
West CarrollZone Three (Low)0.5Radon is a minor problem in West Carroll Parish
West FelicianaZone Three (Low)3.6Radon is a problem in West Feliciana Parish
WinnZone Three (Low)0.9Radon is a minor problem in Winn Parish

Is Radon a Problem in Maine?

County NameEPA Zone Designation
(1=High, 2=Mid, 3=Low)
Average Radon
Level (pCi/L)
Is Radon a Problem in this County?
AndroscogginZone One (High)5.6Radon is a major problem in Androscoggin County
AroostookZone One (High)5.7Radon is a major problem in Aroostook County
CumberlandZone One (High)7.9Radon is a major problem in Cumberland County
FranklinZone One (High)3.1Radon is a major problem in Franklin County
HancockZone One (High)4.4Radon is a major problem in Hancock County
KennebecZone One (High)4.2Radon is a major problem in Kennebec County
KnoxZone Two (Mid)2.7Radon is a problem in Knox County
LincolnZone One (High)4.0Radon is a major problem in Lincoln County
OxfordZone One (High)7.1Radon is a major problem in Oxford County
PenobscotZone One (High)2.7Radon is a major problem in Penobscot County
PiscataquisZone One (High)4.1Radon is a major problem in Piscataquis County
SagadahocZone Two (Mid)3.3Radon is a problem in Sagadahoc County
SomersetZone One (High)2.3Radon is a major problem in Somerset County
WaldoZone Two (Mid)3.4Radon is a problem in Waldo County
WashingtonZone Two (Mid)5.4Radon is a major problem in Washington County
YorkZone One (High)5.0Radon is a major problem in York County

Is Radon a Problem in Maryland?

County NameEPA Zone Designation
(1=High, 2=Mid, 3=Low)
Average Radon
Level (pCi/L)
Is Radon a Problem in this County?
AlleganyZone Two (Mid)4.7Radon is a major problem in Allegany County
Anne ArundelZone Two (Mid)3.4Radon is a problem in Anne Arundel County
BaltimoreZone One (High)3.9Radon is a major problem in Baltimore County
Baltimore CityZone Two (Mid)1.7Radon is a problem in Baltimore City County
CalvertZone One (High)5.3Radon is a major problem in Calvert County
CarolineZone Three (Low)1.1Radon is a minor problem in Caroline County
CarrollZone One (High)9.2Radon is an extreme problem in Carroll County
CecilZone Two (Mid)3.3Radon is a problem in Cecil County
CharlesZone Two (Mid)2.3Radon is a problem in Charles County
DorchesterZone Two (Mid)1.1Radon is a problem in Dorchester County
FrederickZone One (High)11.6Radon is an extreme problem in Frederick County
GarrettZone Two (Mid)5.5Radon is a major problem in Garrett County
HarfordZone One (High)4.4Radon is a major problem in Harford County
HowardZone One (High)5.6Radon is a major problem in Howard County
KentZone Three (Low)3.7Radon is a problem in Kent County
MontgomeryZone One (High)4.6Radon is a major problem in Montgomery County
Prince George’sZone Two (Mid)2.8Radon is a problem in Prince George’s County
Queen Anne’sZone Three (Low)1.8Radon is a minor problem in Queen Anne’s County
Saint Mary’s
(St. Mary’s)
Zone Two (Mid)2.1Radon is a problem in Saint Mary’s County
SomersetZone Three (Low)1.5Radon is a minor problem in Somerset County
TalbotZone Three (Low)1.0Radon is a minor problem in Talbot County
WashingtonZone One (High)9.0Radon is an extreme problem in Washington County
WicomicoZone Three (Low)0.8Radon is a minor problem in Wicomico County
WorcesterZone Three (Low)0.7Radon is a minor problem in Worcester County

Is Radon a Problem in Massachusetts?

County NameEPA Zone Designation
(1=High, 2=Mid, 3=Low)
Average Radon
Level (pCi/L)
Is Radon a Problem in this County?
BarnstableZone Two (Mid)2.9Radon is a problem in Barnstable County
BerkshireZone Two (Mid)3.5Radon is a problem in Berkshire County
BristolZone Two (Mid)3.4Radon is a problem in Bristol County
DukesZone Two (Mid)2.4Radon is a problem in Dukes County
EssexZone One (High)4.6Radon is a major problem in Essex County
FranklinZone Two (Mid)3.5Radon is a problem in Franklin County
HampdenZone Two (Mid)2.3Radon is a problem in Hampden County
HampshireZone Two (Mid)2.8Radon is a problem in Hampshire County
MiddlesexZone One (High)4.3Radon is a major problem in Middlesex County
NantucketZone Two (Mid)0.6Radon is a problem in Nantucket County
NorfolkZone Two (Mid)3.8Radon is a problem in Norfolk County
PlymouthZone Two (Mid)2.8Radon is a problem in Plymouth County
SuffolkZone Three (Low)2.4Radon is a problem in Suffolk County
WorcesterZone One (High)4.8Radon is a major problem in Worcester County

Is Radon a Problem in Michigan?

County NameEPA Zone Designation
(1=High, 2=Mid, 3=Low)
Average Radon
Level (pCi/L)
Is Radon a Problem in this County?
AlconaZone Two (Mid)2.7Radon is a problem in Alcona County
AlgerZone Two (Mid)3.3Radon is a problem in Alger County
AlleganZone Three (Low)3.1Radon is a problem in Allegan County
AlpenaZone Two (Mid)1.9Radon is a problem in Alpena County
AntrimZone Two (Mid)1.6Radon is a problem in Antrim County
ArenacZone Three (Low)1.2Radon is a minor problem in Arenac County
BaragaZone Three (Low)1.8Radon is a minor problem in Baraga County
BarryZone Two (Mid)3.2Radon is a problem in Barry County
BayZone Three (Low)1.6Radon is a minor problem in Bay County
BenzieZone Three (Low)1.6Radon is a minor problem in Benzie County
BerrienZone Three (Low)3.5Radon is a problem in Berrien County
BranchZone One (High)6.1Radon is a major problem in Branch County
CalhounZone One (High)3.7Radon is a major problem in Calhoun County
CassZone One (High)3.2Radon is a major problem in Cass County
CharlevoixZone Two (Mid)1.9Radon is a problem in Charlevoix County
CheboyganZone Three (Low)1.4Radon is a minor problem in Cheboygan County
ChippewaZone Three (Low)1.9Radon is a minor problem in Chippewa County
ClareZone Three (Low)2.4Radon is a problem in Clare County
ClintonZone Two (Mid)4.2Radon is a major problem in Clinton County
CrawfordZone Three (Low)1.7Radon is a minor problem in Crawford County
DeltaZone Three (Low)2.4Radon is a problem in Delta County
DickinsonZone Two (Mid)4.3Radon is a major problem in Dickinson County
EatonZone Two (Mid)3.9Radon is a problem in Eaton County
EmmetZone Two (Mid)2.2Radon is a problem in Emmet County
GeneseeZone Two (Mid)2.9Radon is a problem in Genesee County
GladwinZone Three (Low)2.1Radon is a problem in Gladwin County
GogebicZone Two (Mid)2.1Radon is a problem in Gogebic County
Grand TraverseZone Three (Low)2.1Radon is a problem in Grand Traverse County
GratiotZone Three (Low)2.2Radon is a problem in Gratiot County
HillsdaleZone One (High)6.9Radon is a major problem in Hillsdale County
HoughtonZone Two (Mid)2.2Radon is a problem in Houghton County
HuronZone Three (Low)3.0Radon is a problem in Huron County
InghamZone Two (Mid)2.6Radon is a problem in Ingham County
IoniaZone Two (Mid)4.0Radon is a major problem in Ionia County
IoscoZone Three (Low)1.3Radon is a minor problem in Iosco County
IronZone Two (Mid)4.9Radon is a major problem in Iron County
IsabellaZone Three (Low)2.0Radon is a problem in Isabella County
JacksonZone One (High)5.0Radon is a major problem in Jackson County
KalamazooZone One (High)3.3Radon is a major problem in Kalamazoo County
KalkaskaZone Three (Low)1.6Radon is a minor problem in Kalkaska County
KentZone Two (Mid)2.5Radon is a problem in Kent County
KeweenawZone Two (Mid)1.7Radon is a problem in Keweenaw County
LakeZone Three (Low)1.6Radon is a minor problem in Lake County
LapeerZone Two (Mid)3.3Radon is a problem in Lapeer County
LeelanauZone Two (Mid)1.5Radon is a problem in Leelanau County
LenaweeZone One (High)6.5Radon is a major problem in Lenawee County
LivingstonZone Two (Mid)4.1Radon is a major problem in Livingston County
LuceZone Three (Low)1.3Radon is a minor problem in Luce County
MackinacZone Three (Low)3.0Radon is a problem in Mackinac County
MacombZone Three (Low)2.1Radon is a problem in Macomb County
ManisteeZone Three (Low)2.0Radon is a problem in Manistee County
MarquetteZone Two (Mid)5.4Radon is a major problem in Marquette County
MasonZone Three (Low)1.4Radon is a minor problem in Mason County
MecostaZone Three (Low)2.7Radon is a problem in Mecosta County
MenomineeZone Two (Mid)2.1Radon is a problem in Menominee County
MidlandZone Three (Low)1.3Radon is a minor problem in Midland County
MissaukeeZone Three (Low)1.9Radon is a minor problem in Missaukee County
MonroeZone Two (Mid)3.5Radon is a problem in Monroe County
MontcalmZone Two (Mid)2.4Radon is a problem in Montcalm County
MontmorencyZone Two (Mid)2.4Radon is a problem in Montmorency County
MuskegonZone Three (Low)1.3Radon is a minor problem in Muskegon County
NewaygoZone Three (Low)1.7Radon is a minor problem in Newaygo County
OaklandZone Two (Mid)3.4Radon is a problem in Oakland County
OceanaZone Three (Low)1.3Radon is a minor problem in Oceana County
OgemawZone Three (Low)2.4Radon is a problem in Ogemaw County
OntonagonZone Three (Low)1.4Radon is a minor problem in Ontonagon County
OsceolaZone Three (Low)1.9Radon is a minor problem in Osceola County
OscodaZone Three (Low)2.5Radon is a problem in Oscoda County
OtsegoZone Two (Mid)4.1Radon is a major problem in Otsego County
OttawaZone Three (Low)3.4Radon is a problem in Ottawa County
Presque IsleZone Two (Mid)4.5Radon is a major problem in Presque Isle County
RoscommonZone Three (Low)1.8Radon is a minor problem in Roscommon County
SaginawZone Three (Low)2.2Radon is a problem in Saginaw County
Saint Clair
(St. Clair)
Zone Three (Low)2.2Radon is a problem in Saint Clair County
Saint Joseph
(St. Joseph)
Zone One (High)3.6Radon is a major problem in Saint Joseph County
SanilacZone Two (Mid)2.2Radon is a problem in Sanilac County
SchoolcraftZone Three (Low)1.6Radon is a minor problem in Schoolcraft County
ShiawasseeZone Two (Mid)3.5Radon is a problem in Shiawassee County
TuscolaZone Three (Low)3.7Radon is a problem in Tuscola County
Van BurenZone Three (Low)1.9Radon is a minor problem in Van Buren County
WashtenawZone One (High)4.7Radon is a major problem in Washtenaw County
WayneZone Three (Low)2.5Radon is a problem in Wayne County
WexfordZone Three (Low)2.0Radon is a problem in Wexford County

Is Radon a Problem in Minnesota?

County NameEPA Zone Designation
(1=High, 2=Mid, 3=Low)
Average Radon
Level (pCi/L
Is Radon a Problem in this County?
AitkinZone Two (Mid)3.3Radon is a problem in Aitkin County
AnokaZone Two (Mid)2.4Radon is a problem in Anoka County
BeckerZone One (High)3.8Radon is a major problem in Becker County
BeltramiZone Two (Mid)3.9Radon is a problem in Beltrami County
BentonZone Two (Mid)3.8Radon is a problem in Benton County
Big StoneZone One (High)5.6Radon is a major problem in Big Stone County
Blue EarthZone One (High)6.1Radon is a major problem in Blue Earth County
BrownZone One (High)7.3Radon is a major problem in Brown County
CarltonZone Two (Mid)4.1Radon is a major problem in Carlton County
CarverZone One (High)3.9Radon is a major problem in Carver County
CassZone Two (Mid)2.9Radon is a problem in Cass County
ChippewaZone One (High)6.1Radon is a major problem in Chippewa County
ChisagoZone Two (Mid)3.3Radon is a problem in Chisago County
ClayZone One (High)6.6Radon is a major problem in Clay County
ClearwaterZone Two (Mid)5.0Radon is a major problem in Clearwater County
CookZone Two (Mid)5.1Radon is a major problem in Cook County
CottonwoodZone One (High)7.1Radon is a major problem in Cottonwood County
Crow WingZone Two (Mid)3.3Radon is a problem in Crow Wing County
DakotaZone One (High)3.7Radon is a major problem in Dakota County
DodgeZone One (High)8.9Radon is an extreme problem in Dodge County
DouglasZone One (High)5.8Radon is a major problem in Douglas County
FaribaultZone One (High)6.6Radon is a major problem in Faribault County
FillmoreZone One (High)7.5Radon is a major problem in Fillmore County
FreebornZone One (High)8.1Radon is an extreme problem in Freeborn County
GoodhueZone One (High)6.8Radon is a major problem in Goodhue County
GrantZone One (High)6.3Radon is a major problem in Grant County
HennepinZone One (High)3.6Radon is a major problem in Hennepin County
HoustonZone One (High)5.3Radon is a major problem in Houston County
HubbardZone One (High)3.8Radon is a major problem in Hubbard County
IsantiZone Two (Mid)2.4Radon is a problem in Isanti County
ItascaZone Two (Mid)3.8Radon is a problem in Itasca County
JacksonZone One (High)7.2Radon is a major problem in Jackson County
KanabecZone One (High)4.2Radon is a major problem in Kanabec County
KandiyohiZone One (High)6.3Radon is a major problem in Kandiyohi County
KittsonZone One (High)5.0Radon is a major problem in Kittson County
KoochichingZone Two (Mid)2.8Radon is a problem in Koochiching County
Lac Qui ParleZone One (High)6.6Radon is a major problem in Lac Qui Parle County
LakeZone Two (Mid)2.6Radon is a problem in Lake County
Lake Of The WoodZone Two (Mid)4.9Radon is a major problem in Lake Of The Wood County
Le SueurZone One (High)7.0Radon is a major problem in Le Sueur County
LincolnZone One (High)8.3Radon is an extreme problem in Lincoln County
LyonZone One (High)6.8Radon is a major problem in Lyon County
MahnomenZone One (High)4.0Radon is a major problem in Mahnomen County
MarshallZone One (High)7.2Radon is a major problem in Marshall County
MartinZone One (High)7.5Radon is a major problem in Martin County
McLeodZone One (High)5.3Radon is a major problem in McLeod County
MeekerZone One (High)4.9Radon is a major problem in Meeker County
Mille LacsZone Two (Mid)2.7Radon is a problem in Mille Lacs County
MorrisonZone Two (Mid)3.8Radon is a problem in Morrison County
MowerZone One (High)5.4Radon is a major problem in Mower County
MurrayZone One (High)6.7Radon is a major problem in Murray County
NicolletZone One (High)6.2Radon is a major problem in Nicollet County
NoblesZone One (High)6.9Radon is a major problem in Nobles County
NormanZone One (High)5.9Radon is a major problem in Norman County
OlmstedZone One (High)6.1Radon is a major problem in Olmsted County
Otter TailZone One (High)5.7Radon is a major problem in Otter Tail County
PenningtonZone One (High)4.9Radon is a major problem in Pennington County
PineZone Two (Mid)3.0Radon is a problem in Pine County
PipestoneZone One (High)7.7Radon is a major problem in Pipestone County
PolkZone One (High)6.9Radon is a major problem in Polk County
PopeZone One (High)5.0Radon is a major problem in Pope County
RamseyZone One (High)3.1Radon is a major problem in Ramsey County
Red LakeZone One (High)4.8Radon is a major problem in Red Lake County
RedwoodZone One (High)7.3Radon is a major problem in Redwood County
RenvilleZone One (High)7.6Radon is a major problem in Renville County
RiceZone One (High)5.7Radon is a major problem in Rice County
RockZone One (High)8.6Radon is an extreme problem in Rock County
RoseauZone One (High)2.4Radon is a major problem in Roseau County
Saint Louis
(St. Louis)
Zone Two (Mid)3.1Radon is a problem in Saint Louis County
ScottZone One (High)4.8Radon is a major problem in Scott County
SherburneZone One (High)3.8Radon is a major problem in Sherburne County
SibleyZone One (High)7.7Radon is a major problem in Sibley County
StearnsZone One (High)4.8Radon is a major problem in Stearns County
SteeleZone One (High)6.1Radon is a major problem in Steele County
StevensZone One (High)6.6Radon is a major problem in Stevens County
SwiftZone One (High)5.2Radon is a major problem in Swift County
ToddZone One (High)3.7Radon is a major problem in Todd County
TraverseZone One (High)5.3Radon is a major problem in Traverse County
WabashaZone One (High)6.9Radon is a major problem in Wabasha County
WadenaZone One (High)3.0Radon is a major problem in Wadena County
WasecaZone One (High)7.5Radon is a major problem in Waseca County
WashingtonZone One (High)3.5Radon is a major problem in Washington County
WatonwanZone One (High)6.6Radon is a major problem in Watonwan County
WilkinZone One (High)5.3Radon is a major problem in Wilkin County
WinonaZone One (High)5.6Radon is a major problem in Winona County
WrightZone One (High)4.7Radon is a major problem in Wright County
Yellow MedicineZone One (High)6.6Radon is a major problem in Yellow Medicine County

Is Radon a Problem in Mississippi?

County NameEPA Zone Designation
(1=High, 2=Mid, 3=Low)
Average Radon
Level (pCi/L)
Is Radon a Problem in this County?
AdamsZone Three (Low)4.4Radon is a major problem in Adams County
AlcornZone Two (Mid)1.7Radon is a problem in Alcorn County
AmiteZone Three (Low)1.4Radon is a minor problem in Amite County
AttalaZone Three (Low)0.6Radon is a minor problem in Attala County
BentonZone Three (Low)0.7Radon is a minor problem in Benton County
BolivarZone Three (Low)2.2Radon is a problem in Bolivar County
CalhounZone Three (Low)0.5Radon is a minor problem in Calhoun County
CarrollZone Three (Low)2.6Radon is a problem in Carroll County
ChickasawZone Two (Mid)No DataRadon is a problem in Chickasaw County
ChoctawZone Three (Low)No DataRadon is a minor problem in Choctaw County
ClaiborneZone Three (Low)No DataRadon is a minor problem in Claiborne County
ClarkeZone Three (Low)0.4Radon is a minor problem in Clarke County
ClayZone Two (Mid)1.7Radon is a problem in Clay County
CoahomaZone Three (Low)3.3Radon is a problem in Coahoma County
CopiahZone Three (Low)0.4Radon is a minor problem in Copiah County
CovingtonZone Three (Low)1.1Radon is a minor problem in Covington County
De SotoZone Three (Low)1.1Radon is a minor problem in De Soto County
ForrestZone Three (Low)0.8Radon is a minor problem in Forrest County
FranklinZone Three (Low)No DataRadon is a minor problem in Franklin County
GeorgeZone Three (Low)2.3Radon is a problem in George County
GreeneZone Three (Low)No DataRadon is a minor problem in Greene County
GrenadaZone Three (Low)2.4Radon is a problem in Grenada County
HancockZone Three (Low)1.8Radon is a minor problem in Hancock County
HarrisonZone Three (Low)0.6Radon is a minor problem in Harrison County
HindsZone Three (Low)0.9Radon is a minor problem in Hinds County
HolmesZone Three (Low)2.0Radon is a problem in Holmes County
HumphreysZone Three (Low)No DataRadon is a minor problem in Humphreys County
IssaquenaZone Three (Low)No DataRadon is a minor problem in Issaquena County
ItawambaZone Three (Low)2.2Radon is a problem in Itawamba County
JacksonZone Three (Low)0.4Radon is a minor problem in Jackson County
JasperZone Three (Low)2.2Radon is a problem in Jasper County
JeffersonZone Three (Low)No DataRadon is a minor problem in Jefferson County
Jefferson DavisZone Three (Low)1.6Radon is a minor problem in Jefferson Davis County
JonesZone Three (Low)0.3Radon is a minor problem in Jones County
KemperZone Three (Low)0.3Radon is a minor problem in Kemper County
LafayetteZone Three (Low)1.0Radon is a minor problem in Lafayette County
LamarZone Three (Low)0.6Radon is a minor problem in Lamar County
LauderdaleZone Three (Low)1.2Radon is a minor problem in Lauderdale County
LawrenceZone Three (Low)0.4Radon is a minor problem in Lawrence County
LeakeZone Three (Low)0.5Radon is a minor problem in Leake County
LeeZone Two (Mid)1.2Radon is a problem in Lee County
LefloreZone Three (Low)0.9Radon is a minor problem in Leflore County
LincolnZone Three (Low)0.6Radon is a minor problem in Lincoln County
LowndesZone Two (Mid)0.6Radon is a minor problem in Lowndes County
MadisonZone Three (Low)0.6Radon is a minor problem in Madison County
MarionZone Three (Low)1.4Radon is a minor problem in Marion County
MarshallZone Three (Low)1.2Radon is a minor problem in Marshall County
MonroeZone Three (Low)1.3Radon is a minor problem in Monroe County
MontgomeryZone Three (Low)1.4Radon is a minor problem in Montgomery County
NeshobaZone Three (Low)1.4Radon is a minor problem in Neshoba County
NewtonZone Three (Low)No DataRadon is a minor problem in Newton County
NoxubeeZone Two (Mid)0.6Radon is a problem in Noxubee County
OktibbehaZone Three (Low)2.2Radon is a problem in Oktibbeha County
PanolaZone Three (Low)2.1Radon is a problem in Panola County
Pearl RiverZone Three (Low)0.4Radon is a minor problem in Pearl River County
PerryZone Three (Low)1.1Radon is a minor problem in Perry County
PikeZone Three (Low)0.2Radon is a minor problem in Pike County
PontotocZone Two (Mid)1.2Radon is a problem in Pontotoc County
PrentissZone Three (Low)0.7Radon is a minor problem in Prentiss County
QuitmanZone Three (Low)2.2Radon is a problem in Quitman County
RankinZone Three (Low)1.8Radon is a minor problem in Rankin County
ScottZone Three (Low)0.7Radon is a minor problem in Scott County
SharkeyZone Three (Low)No DataRadon is a minor problem in Sharkey County
SimpsonZone Three (Low)0.8Radon is a minor problem in Simpson County
SmithZone Three (Low)1.1Radon is a minor problem in Smith County
StoneZone Three (Low)0.9Radon is a minor problem in Stone County
SunflowerZone Three (Low)2.6Radon is a problem in Sunflower County
TallahatchieZone Three (Low)0.8Radon is a minor problem in Tallahatchie County
TateZone Three (Low)0.5Radon is a minor problem in Tate County
TippahZone Three (Low)0.8Radon is a minor problem in Tippah County
TishomingoZone Three (Low)1.7Radon is a minor problem in Tishomingo County
TunicaZone Three (Low)No DataRadon is a minor problem in Tunica County
UnionZone Two (Mid)23.5Radon is an extreme problem in Union County
WalthallZone Three (Low)0.1Radon is a minor problem in Walthall County
WarrenZone Three (Low)1.5Radon is a minor problem in Warren County
WashingtonZone Three (Low)1.2Radon is a minor problem in Washington County
WayneZone Three (Low)1.1Radon is a minor problem in Wayne County
WebsterZone Three (Low)No DataRadon is a minor problem in Webster County
WilkinsonZone Three (Low)1.2Radon is a minor problem in Wilkinson County
WinstonZone Three (Low)2.1Radon is a problem in Winston County
YalobushaZone Three (Low)No DataRadon is a minor problem in Yalobusha County
YazooZone Three (Low)1.7Radon is a minor problem in Yazoo County

Is Radon a Problem in Missouri?

County NameEPA Zone Designation
(1=High, 2=Mid, 3=Low)
Average Radon
Level (pCi/L)
Is Radon a Problem in this County?
AdairZone Two (Mid)2.0Radon is a problem in Adair County
AndrewZone One (High)7.1Radon is a major problem in Andrew County
AtchisonZone One (High)7.0Radon is a major problem in Atchison County
AudrainZone Two (Mid)5.2Radon is a major problem in Audrain County
BarryZone Two (Mid)4.7Radon is a major problem in Barry County
BartonZone Two (Mid)2.1Radon is a problem in Barton County
BatesZone Two (Mid)2.4Radon is a problem in Bates County
BentonZone Two (Mid)2.4Radon is a problem in Benton County
BollingerZone Two (Mid)2.5Radon is a problem in Bollinger County
BooneZone Two (Mid)4.0Radon is a major problem in Boone County
BuchananZone One (High)5.6Radon is a major problem in Buchanan County
ButlerZone Three (Low)2.5Radon is a problem in Butler County
CaldwellZone Two (Mid)4.5Radon is a major problem in Caldwell County
CallawayZone Two (Mid)4.6Radon is a major problem in Callaway County
CamdenZone Two (Mid)2.6Radon is a problem in Camden County
Cape GirardeauZone Two (Mid)3.3Radon is a problem in Cape Girardeau County
CarrollZone Two (Mid)3.4Radon is a problem in Carroll County
CarterZone Two (Mid)4.2Radon is a major problem in Carter County
CassZone One (High)5.6Radon is a major problem in Cass County
CedarZone Two (Mid)1.4Radon is a problem in Cedar County
CharitonZone Two (Mid)2.5Radon is a problem in Chariton County
ChristianZone Two (Mid)4.3Radon is a major problem in Christian County
ClarkZone Two (Mid)4.5Radon is a major problem in Clark County
ClayZone One (High)4.0Radon is a major problem in Clay County
ClintonZone One (High)4.3Radon is a major problem in Clinton County
ColeZone Two (Mid)3.0Radon is a problem in Cole County
CooperZone Two (Mid)4.3Radon is a major problem in Cooper County
CrawfordZone Two (Mid)2.8Radon is a problem in Crawford County
DadeZone Two (Mid)2.9Radon is a problem in Dade County
DallasZone Two (Mid)1.6Radon is a problem in Dallas County
DaviessZone Two (Mid)2.3Radon is a problem in Daviess County
DeKalbZone Two (Mid)4.4Radon is a major problem in DeKalb County
DentZone Two (Mid)4.0Radon is a major problem in Dent County
DouglasZone Two (Mid)5.5Radon is a major problem in Douglas County
DunklinZone Three (Low)1.2Radon is a minor problem in Dunklin County
FranklinZone Two (Mid)3.4Radon is a problem in Franklin County
GasconadeZone Two (Mid)2.8Radon is a problem in Gasconade County
GentryZone Two (Mid)4.8Radon is a major problem in Gentry County
GreeneZone Two (Mid)4.0Radon is a major problem in Greene County
GrundyZone Two (Mid)5.5Radon is a major problem in Grundy County
HarrisonZone Two (Mid)3.6Radon is a problem in Harrison County
HenryZone Two (Mid)3.6Radon is a problem in Henry County
HickoryZone Two (Mid)2.2Radon is a problem in Hickory County
HoltZone One (High)5.1Radon is a major problem in Holt County
HowardZone Two (Mid)5.0Radon is a major problem in Howard County
HowellZone Two (Mid)6.4Radon is a major problem in Howell County
IronZone One (High)3.9Radon is a major problem in Iron County
JacksonZone One (High)4.9Radon is a major problem in Jackson County
JasperZone Two (Mid)3.2Radon is a problem in Jasper County
JeffersonZone Two (Mid)5.3Radon is a major problem in Jefferson County
JohnsonZone Two (Mid)3.2Radon is a problem in Johnson County
KnoxZone Two (Mid)1.7Radon is a problem in Knox County
LacledeZone Two (Mid)3.1Radon is a problem in Laclede County
LafayetteZone Two (Mid)5.2Radon is a major problem in Lafayette County
LawrenceZone Two (Mid)5.2Radon is a major problem in Lawrence County
LewisZone Two (Mid)1.7Radon is a problem in Lewis County
LincolnZone Two (Mid)4.5Radon is a major problem in Lincoln County
LinnZone Two (Mid)2.6Radon is a problem in Linn County
LivingstonZone Two (Mid)3.6Radon is a problem in Livingston County
MaconZone Two (Mid)2.5Radon is a problem in Macon County
MadisonZone Two (Mid)4.3Radon is a major problem in Madison County
MariesZone Two (Mid)2.0Radon is a problem in Maries County
MarionZone Two (Mid)5.6Radon is a major problem in Marion County
McDonaldZone Two (Mid)5.4Radon is a major problem in McDonald County
MercerZone Two (Mid)3.2Radon is a problem in Mercer County
MillerZone Two (Mid)3.0Radon is a problem in Miller County
MississippiZone Three (Low)0.9Radon is a minor problem in Mississippi County
MoniteauZone Two (Mid)3.0Radon is a problem in Moniteau County
MonroeZone Two (Mid)2.6Radon is a problem in Monroe County
MontgomeryZone Two (Mid)5.1Radon is a major problem in Montgomery County
MorganZone Two (Mid)2.8Radon is a problem in Morgan County
New MadridZone Three (Low)1.3Radon is a minor problem in New Madrid County
NewtonZone Two (Mid)2.5Radon is a problem in Newton County
NodawayZone One (High)6.3Radon is a major problem in Nodaway County
OregonZone Two (Mid)5.5Radon is a major problem in Oregon County
OsageZone Two (Mid)2.0Radon is a problem in Osage County
OzarkZone Two (Mid)4.9Radon is a major problem in Ozark County
PemiscotZone Three (Low)1.0Radon is a minor problem in Pemiscot County
PerryZone Two (Mid)4.1Radon is a major problem in Perry County
PettisZone Two (Mid)4.8Radon is a major problem in Pettis County
PhelpsZone Two (Mid)2.0Radon is a problem in Phelps County
PikeZone Two (Mid)3.2Radon is a problem in Pike County
PlatteZone One (High)4.4Radon is a major problem in Platte County
PolkZone Two (Mid)2.3Radon is a problem in Polk County
PulaskiZone Two (Mid)1.9Radon is a problem in Pulaski County
PutnamZone Two (Mid)1.8Radon is a problem in Putnam County
RallsZone Two (Mid)8.8Radon is an extreme problem in Ralls County
RandolphZone Two (Mid)2.2Radon is a problem in Randolph County
RayZone Two (Mid)5.1Radon is a major problem in Ray County
ReynoldsZone Two (Mid)2.7Radon is a problem in Reynolds County
RipleyZone Two (Mid)4.3Radon is a major problem in Ripley County
Saint Charles
(St. Charles)
Zone Two (Mid)3.6Radon is a problem in Saint Charles County
Saint Clair
(St. Clair)
Zone Two (Mid)1.2Radon is a problem in Saint Clair County
Sainte Genevieve
(Ste. Genevieve)
Zone Two (Mid)5.7Radon is a major problem in Sainte Genevieve County
Saint Francois
(St. Francois)
Zone Two (Mid)4.6Radon is a major problem in Saint Francois County
Saint Louis
(St. Louis)
Zone Two (Mid)3.5Radon is a problem in Saint Louis County
Saint Louis City
(St. Louis City)
Zone Two (Mid)2.4Radon is a problem in Saint Louis City County
SalineZone Two (Mid)4.8Radon is a major problem in Saline County
SchuylerZone Two (Mid)1.9Radon is a problem in Schuyler County
ScotlandZone Two (Mid)3.1Radon is a problem in Scotland County
ScottZone Three (Low)1.9Radon is a minor problem in Scott County
ShannonZone Two (Mid)2.6Radon is a problem in Shannon County
ShelbyZone Two (Mid)2.1Radon is a problem in Shelby County
StoddardZone Three (Low)1.2Radon is a minor problem in Stoddard County
StoneZone Two (Mid)7.7Radon is a major problem in Stone County
SullivanZone Two (Mid)3.2Radon is a problem in SullivanCounty
TaneyZone Two (Mid)5.5Radon is a major problem in Taney County
TexasZone Two (Mid)1.7Radon is a problem in Texas County
VernonZone Two (Mid)1.8Radon is a problem in Vernon County
WarrenZone Two (Mid)4.2Radon is a major problem in WarrenCounty
WashingtonZone Two (Mid)3.6Radon is a problem in Washington County
WayneZone Two (Mid)5.3Radon is a major problem in Wayne County
WebsterZone Two (Mid)2.8Radon is a problem in Webster County
WorthZone Two (Mid)3.5Radon is a problem in Worth County
WrightZone Two (Mid)3.2Radon is a problem in Wright County

Is Radon a Problem in Montana?

County NameEPA Zone Designation
(1=High, 2=Mid, 3=Low)
Average Radon
Level (pCi/L)
Is Radon a Problem in this County?
BeaverheadZone One (High)10.7Radon is an extreme problem in Beaverhead County
Big HornZone One (High)5.8Radon is a major problem in Big Horn County
BlaineZone One (High)8.7Radon is an extreme problem in Blaine County
BroadwaterZone One (High)4.2Radon is a major problem in Broadwater County
CarbonZone One (High)5.1Radon is a major problem in Carbon County
CarterZone One (High)3.5Radon is a major problem in Carter County
CascadeZone One (High)3.8Radon is a major problem in Cascade County
ChouteauZone One (High)4.9Radon is a major problem in Chouteau County
CusterZone One (High)3.9Radon is a major problem in Custer County
DanielsZone One (High)5.8Radon is a major problem in Daniels County
DawsonZone One (High)4.2Radon is a major problem in Dawson County
Deer LodgeZone One (High)4.8Radon is a major problem in Deer Lodge County
FallonZone One (High)14.2Radon is an extreme problem in Fallon County
FergusZone One (High)10.4Radon is an extreme problem in Fergus County
FlatheadZone One (High)7.6Radon is a major problem in Flathead County
GallatinZone One (High)5.5Radon is a major problem in Gallatin County
GarfieldZone One (High)No DataRadon is a major problem in Garfield County
GlacierZone One (High)3.9Radon is a major problem in Glacier County
Golden ValleyZone Two (Mid)4.1Radon is a major problem in Golden Valley County
GraniteZone One (High)6.0Radon is a major problem in Granite County
HillZone One (High)3.5Radon is a major problem in Hill County
JeffersonZone One (High)8.7Radon is an extreme problem in Jefferson County
Judith BasinZone One (High)7.4Radon is a major problem in Judith Basin County
LakeZone One (High)6.0Radon is a major problem in Lake County
Lewis And ClarkZone One (High)12.8Radon is an extreme problem in Lewis And Clark County
LibertyZone One (High)3.2Radon is a major problem in Liberty County
LincolnZone One (High)8.2Radon is an extreme problem in Lincoln County
MadisonZone One (High)5.4Radon is a major problem in Madison County
McConeZone One (High)6.0Radon is a major problem in McCone County
MeagherZone One (High)2.8Radon is a major problem in Meagher County
MineralZone One (High)8.2Radon is an extreme problem in Mineral County
MissoulaZone One (High)6.3Radon is a major problem in Missoula County
MusselshellZone Two (Mid)4.1Radon is a major problem in Musselshell County
ParkZone One (High)7.1Radon is a major problem in Park County
PetroleumZone Two (Mid)3.8Radon is a problem in Petroleum County
PhillipsZone One (High)3.5Radon is a problem in Phillips County
PonderaZone One (High)4.9Radon is a major problem in Pondera County
Powder RiverZone One (High)4.9Radon is a major problem in Powder River County
PowellZone One (High)8.3Radon is an extreme problem in Powell County
PrairieZone One (High)4.0Radon is a major problem in Prairie County
RavalliZone One (High)6.2Radon is a major problem in Ravalli County
RichlandZone One (High)5.8Radon is a major problem in Richland County
RooseveltZone One (High)4.8Radon is a major problem in Roosevelt County
RosebudZone One (High)4.0Radon is a major problem in Rosebud County
SandersZone One (High)11.9Radon is an extreme problem in Sanders County
SheridanZone One (High)8.7Radon is an extreme problem in Sheridan County
Silver BowZone One (High)9.3Radon is an extreme problem in Silver Bow County
StillwaterZone One (High)5.9Radon is a major problem in Stillwater County
Sweet GrassZone Two (Mid)11.0Radon is an extreme problem in Sweet Grass County
TetonZone One (High)5.9Radon is a major problem in Teton County
TooleZone One (High)3.5Radon is a problem in Toole County
TreasureZone Two (Mid)No DataRadon is a problem in Treasure County
ValleyZone One (High)5.9Radon is a major problem in Valley County
WheatlandZone Two (Mid)5.8Radon is a major problem in Wheatland County
WibauxZone One (High)10.4Radon is an extreme problem in Wibaux County
YellowstoneZone Two (Mid)3.5Radon is a problem in Yellowstone County

Is Radon a Problem in Nebraska?

County NameEPA Zone Designation
(1=High, 2=Mid, 3=Low)
Average Radon
Level (pCi/L)
Is Radon a Problem in this County?
AdamsZone One (High)6.0Radon is a major problem in Adams County
AntelopeZone Two (Mid)7.4Radon is a major problem in Antelope County
ArthurZone Three (Low)1.3Radon is a minor problem in Arthur County
BannerZone Two (Mid)6.9Radon is a major problem in Banner County
BlaineZone Three (Low)0.9Radon is a minor problem in Blaine County
BooneZone One (High)7.3Radon is a major problem in Boone County
Box ButteZone Two (Mid)3.4Radon is a problem in Box Butte County
BoydZone One (High)8.1Radon is an extreme problem in Boyd County
BrownZone Three (Low)3.2Radon is a problem in Brown County
BuffaloZone Two (Mid)4.7Radon is a major problem in Buffalo County
BurtZone One (High)9.9Radon is an extreme problem in Burt County
ButlerZone One (High)8.5Radon is an extreme problem in Butler County
CassZone One (High)8.4Radon is an extreme problem in Cass County
CedarZone One (High)12.0Radon is an extreme problem in Cedar County
ChaseZone Two (Mid)5.4Radon is a major problem in Chase County
CherryZone Three (Low)2.2Radon is a problem in Cherry County
CheyenneZone Two (Mid)4.6Radon is a major problem in Cheyenne County
ClayZone One (High)8.6Radon is an extreme problem in Clay County
ColfaxZone One (High)7.7Radon is a major problem in Colfax County
CumingZone One (High)7.2Radon is a major problem in Cuming County
CusterZone Two (Mid)4.8Radon is a major problem in Custer County
DakotaZone One (High)7.4Radon is a major problem in Dakota County
DawesZone Two (Mid)6.0Radon is a major problem in Dawes County
DawsonZone Two (Mid)3.6Radon is a problem in Dawson County
DeuelZone Two (Mid)5.0Radon is a major problem in Deuel County
DixonZone One (High)10.8Radon is an extreme problem in Dixon County
DodgeZone One (High)6.6Radon is a major problem in Dodge County
DouglasZone One (High)4.7Radon is a major problem in Douglas County
DundyZone Two (Mid)4.2Radon is a major problem in Dundy County
FillmoreZone One (High)8.7Radon is an extreme problem in Fillmore County
FranklinZone One (High)6.8Radon is a major problem in Franklin County
FrontierZone One (High)5.5Radon is a major problem in Frontier County
FurnasZone One (High)6.1Radon is a major problem in Furnas County
GageZone One (High)8.1Radon is an extreme problem in Gage County
GardenZone Three (Low)3.6Radon is a problem in Garden County
GarfieldZone Three (Low)3.6Radon is a problem in Garfield County
GosperZone One (High)5.5Radon is a major problem in Gosper County
GrantZone Three (Low)1.0Radon is a minor problem in Grant County
GreeleyZone One (High)5.5Radon is a major problem in Greeley County
HallZone Two (Mid)3.4Radon is a problem in Hall County
HamiltonZone One (High)7.4Radon is a major problem in Hamilton County
HarlanZone One (High)6.0Radon is a major problem in Harlan County
HayesZone One (High)6.5Radon is a major problem in Hayes County
HitchcockZone One (High)3.7Radon is a major problem in Hitchcock County
HoltZone Three (Low)3.9Radon is a problem in Holt County
HookerZone Three (Low)1.5Radon is a minor problem in Hooker County
HowardZone Two (Mid)3.3Radon is a problem in Howard County
JeffersonZone One (High)8.4Radon is an extreme problem in Jefferson County
JohnsonZone One (High)7.1Radon is a major problem in Johnson County
KearneyZone One (High)5.2Radon is a major problem in Kearney County
KeithZone Two (Mid)4.3Radon is a major problem in Keith County
Keya PahaZone Two (Mid)2.6Radon is a problem in Keya Paha County
KimballZone Two (Mid)4.9Radon is a major problem in Kimball County
KnoxZone One (High)8.6Radon is an extreme problem in Knox County
LancasterZone One (High)5.1Radon is a major problem in Lancaster County
LincolnZone Three (Low)2.9Radon is a problem in Lincoln County
LoganZone Three (Low)2.3Radon is a problem in Logan County
LoupZone Three (Low)1.3Radon is a minor problem in Loup County
McPhersonZone Three (Low)1.7Radon is a minor problem in McPherson County
MadisonZone One (High)7.4Radon is a major problem in Madison County
MerrickZone Two (Mid)2.3Radon is a problem in Merrick County
MorrillZone Two (Mid)4.2Radon is a major problem in Morrill County
NanceZone One (High)6.4Radon is a major problem in Nance County
NemahaZone One (High)11.7Radon is an extreme problem in Nemaha County
NuckollsZone One (High)8.8Radon is an extreme problem in Nuckolls County
OtoeZone One (High)7.6Radon is a major problem in Otoe County
PawneeZone One (High)5.6Radon is a major problem in Pawnee County
PerkinsZone Two (Mid)4.8Radon is a major problem in Perkins County
PhelpsZone One (High)5.2Radon is a major problem in Phelps County
PierceZone One (High)6.1Radon is a major problem in Pierce County
PlatteZone One (High)5.4Radon is a major problem in Platte County
PolkZone One (High)7.9Radon is a major problem in Polk County
Red WillowZone One (High)4.7Radon is a major problem in Red Willow County
RichardsonZone One (High)8.3Radon is an extreme problem in Richardson County
RockZone Three (Low)3.0Radon is a problem in Rock County
SalineZone One (High)7.0Radon is a major problem in Saline County
SarpyZone One (High)4.9Radon is a major problem in Sarpy County
SaundersZone One (High)8.1Radon is an extreme problem in Saunders County
Scotts BluffZone Two (Mid)4.9Radon is a major problem in Scotts Bluff County
SewardZone One (High)8.5Radon is an extreme problem in Seward County
SheridanZone Two (Mid)3.9Radon is a problem in Sheridan County
ShermanZone Two (Mid)4.4Radon is a major problem in Sherman County
SiouxZone Two (Mid)1.6Radon is a problem in Sioux County
StantonZone One (High)8.7Radon is an extreme problem in Stanton County
ThayerZone One (High)9.8Radon is an extreme problem in Thayer County
ThomasZone Three (Low)1.4Radon is a minor problem in Thomas County
ThurstonZone One (High)8.7Radon is an extreme problem in Thurston County
ValleyZone Two (Mid)4.5Radon is a major problem in Valley County
WashingtonZone One (High)7.2Radon is a major problem in Washington County
WayneZone One (High)10.3Radon is an extreme problem in Wayne County
WebsterZone One (High)8.5Radon is an extreme problem in Webster County
WheelerZone Three (Low)1.2Radon is a minor problem in Wheeler County
YorkZone One (High)8.8Radon is an extreme problem in York County

Is Radon a Problem in Nevada?

County NameEPA Zone Designation
(1=High, 2=Mid, 3=Low)
Average Radon
Level (pCi/L)
Is Radon a Problem in this County?
Carson CityZone One (High)3.8Radon is a major problem in Carson City County
ChurchillZone Two (Mid)1.4Radon is a problem in Churchill County
ClarkZone Three (Low)1.1Radon is a minor problem in Clark County
DouglasZone One (High)5.6Radon is a major problem in Douglas County
ElkoZone Two (Mid)2.5Radon is a problem in Elko County
EsmeraldaZone Two (Mid)0.6Radon is a problem in Esmeralda County
EurekaZone One (High)3.0Radon is a major problem in Eureka County
HumboldtZone Two (Mid)2.1Radon is a problem in Humboldt County
LanderZone One (High)No DataRadon is a major problem in Lander County
LincolnZone One (High)3.0Radon is a major problem in Lincoln County
LyonZone One (High)2.5Radon is a major problem in Lyon County
MineralZone One (High)3.6Radon is a major problem in Mineral County
NyeZone Two (Mid)1.2Radon is a problem in Nye County
PershingZone One (High)3.1Radon is a major problem in Pershing County
StoreyZone Two (Mid)0.8Radon is a problem in Storey County
WashoeZone Two (Mid)3.2Radon is a problem in Washoe County
White PineZone One (High)1.3Radon is a major problem in White Pine County

Is Radon a Problem in New Hampshire?

County NameEPA Zone Designation
(1=High, 2=Mid, 3=Low)
Average Radon
Level (pCi/L)
Is Radon a Problem in this County?
BelknapZone Two (Mid)2.6Radon is a problem in Belknap County
CarrollZone One (High)8.1Radon is an extreme problem in Carroll County
CheshireZone Two (Mid)3.2Radon is a problem in Cheshire County
CoosZone Two (Mid)8.5Radon is an extreme problem in Coos County
GraftonZone Two (Mid)4.4Radon is a major problem in Grafton County
HillsboroughZone Two (Mid)5.2Radon is a major problem in Hillsborough County
MerrimackZone Two (Mid)5.3Radon is a major problem in Merrimack County
RockinghamZone Two (Mid)5.5Radon is a major problem in Rockingham County
StraffordZone Two (Mid)6.0Radon is a major problem in Strafford County
SullivanZone Two (Mid)2.2Radon is a problem in Sullivan County

Is Radon a Problem in New Jersey?

County NameEPA Zone Designation
(1=High, 2=Mid, 3=Low)
Average Radon
Level (pCi/L)
Is Radon a Problem in this County?
AtlanticZone Three (Low)1.4Radon is a minor problem in Atlantic County
BergenZone Two (Mid)1.8Radon is a problem in Bergen County
BurlingtonZone Two (Mid)2.1Radon is a problem in Burlington County
CamdenZone Two (Mid)2.7Radon is a problem in Camden County
Cape MayZone Three (Low)0.9Radon is a minor problem in Cape May County
CumberlandZone Two (Mid)1.8Radon is a problem in Cumberland County
EssexZone Two (Mid)1.7Radon is a problem in Essex County
GloucesterZone Two (Mid)3.2Radon is a problem in Gloucester County
HudsonZone Two (Mid)1.8Radon is a problem in Hudson County
HunterdonZone One (High)10.0Radon is an extreme problem in Hunterdon County
MercerZone One (High)7.9Radon is a major problem in Mercer County
MiddlesexZone Two (Mid)2.6Radon is a problem in Middlesex County
MonmouthZone One (High)2.7Radon is a major problem in Monmouth County
MorrisZone One (High)4.5Radon is a major problem in Morris County
OceanZone Three (Low)1.4Radon is a minor problem in Ocean County
PassaicZone Two (Mid)2.5Radon is a problem in Passaic County
SalemZone Two (Mid)3.1Radon is a problem in Salem County
SomersetZone One (High)5.0Radon is a major problem in Somerset County
SussexZone One (High)5.9Radon is a major problem in Sussex County
UnionZone Two (Mid)2.3Radon is a problem in Union County
WarrenZone One (High)10.8Radon is an extreme problem in Warren County

Is Radon a Problem in New Mexico?

County NameEPA Zone Designation
(1=High, 2=Mid, 3=Low)
Average Radon
Level (pCi/L)
Is Radon a Problem in this County?
BernalilloZone One (High)3.3Radon is a major problem in Bernalillo County
CatronZone Two (Mid)3.3Radon is a problem in Catron County
ChavesZone Two (Mid)4.1Radon is a major problem in Chaves County
CibolaZone Two (Mid)3.3Radon is a problem in Cibola County
ColfaxZone One (High)5.9Radon is a major problem in Colfax County
CurryZone Two (Mid)1.2Radon is a problem in Curry County
De BacaZone Two (Mid)No DataRadon is a problem in De Baca County
Dona AnaZone Two (Mid)1.9Radon is a problem in Dona Ana County
EddyZone Two (Mid)1.2Radon is a problem in Eddy County
GrantZone Two (Mid)3.9Radon is a problem in Grant County
GuadalupeZone Two (Mid)0.9Radon is a problem in Guadalupe County
HardingZone Two (Mid)1.6Radon is a problem in Harding County
HidalgoZone Two (Mid)2.6Radon is a problem in Hidalgo County
LeaZone Two (Mid)1.6Radon is a problem in Lea County
LincolnZone Two (Mid)2.8Radon is a problem in Lincoln County
Los AlamosZone Two (Mid)3.3Radon is a problem in Los Alamos County
LunaZone Two (Mid)2.8Radon is a problem in Luna County
McKinleyZone Two (Mid)4.6Radon is a major problem in McKinley County
MoraZone One (High)5.2Radon is a major problem in Mora County
OteroZone Two (Mid)1.9Radon is a problem in Otero County
QuayZone Two (Mid)2.0Radon is a problem in Quay County
Rio ArribaZone One (High)3.9Radon is a major problem in Rio Arriba County
RooseveltZone Two (Mid)1.9Radon is a problem in Roosevelt County
SandovalZone Two (Mid)2.7Radon is a problem in Sandoval County
San JuanZone Two (Mid)2.0Radon is a problem in San Juan County
San MiguelZone One (High)5.4Radon is a major problem in San Miguel County
Santa FeZone One (High)3.9Radon is a major problem in Santa Fe County
SierraZone Two (Mid)2.9Radon is a problem in Sierra County
SocorroZone Two (Mid)6.1Radon is a major problem in Socorro County
TaosZone One (High)6.9Radon is a major problem in Taos County
TorranceZone Two (Mid)1.9Radon is a problem in Torrance County
UnionZone Two (Mid)2.9Radon is a problem in Union County
ValenciaZone Two (Mid)2.2Radon is a problem in Valencia County

Is Radon a Problem in New York?

County NameEPA Zone Designation
(1=High, 2=Mid, 3=Low)
Average Radon
Level (pCi/L)
Is Radon a Problem in this County?
AlbanyZone One (High)3.1Radon is a major problem in Albany County
AlleganyZone One (High)7.8Radon is a major problem in Allegany County
BronxZone Three (Low)107.3Radon is an extreme problem in Bronx County
BroomeZone One (High)2.9Radon is a major problem in Broome County
CattaraugusZone One (High)6.0Radon is a major problem in Cattaraugus County
CayugaZone One (High)3.5Radon is a major problem in Cayuga County
ChautauquaZone One (High)5.1Radon is a major problem in Chautauqua County
ChemungZone One (High)9.0Radon is an extreme problem in Chemung County
ChenangoZone One (High)5.4Radon is a major problem in Chenango County
ClintonZone Two (Mid)1.5Radon is a problem in Clinton County
ColumbiaZone One (High)5.3Radon is a major problem in Columbia County
CortlandZone One (High)7.8Radon is a major problem in Cortland County
DelawareZone One (High)4.4Radon is a major problem in Delaware County
DutchessZone One (High)4.9Radon is a major problem in Dutchess County
ErieZone One (High)3.6Radon is a major problem in Erie County
EssexZone Three (Low)1.5Radon is a minor problem in Essex County
FranklinZone Three (Low)1.4Radon is a minor problem in Essex County
FultonZone Three (Low)1.7Radon is a minor problem in Fulton County
GeneseeZone One (High)4.1Radon is a major problem in Genesee County
GreeneZone One (High)3.6Radon is a major problem in Greene County
HamiltonZone Three (Low)1.1Radon is a minor problem in Hamilton County
HerkimerZone Three (Low)5.0Radon is a major problem in Herkimer County
JeffersonZone Two (Mid)2.5Radon is a problem in Jefferson County
KingsZone Three (Low)1.7Radon is a minor problem in Kings County
LewisZone Two (Mid)3.2Radon is a problem in Lewis County
LivingstonZone One (High)6.1Radon is a major problem in Livingston County
MadisonZone One (High)4.1Radon is a major problem in Madison County
MonroeZone Two (Mid)2.3Radon is a problem in Monroe County
MontgomeryZone Two (Mid)2.4Radon is a problem in Montgomery County
NassauZone Three (Low)1.9Radon is a minor problem in Nassau County
New York CityZone Three (Low)2.4Radon is a problem in New York City County
NiagaraZone Two (Mid)2.0Radon is a problem in Niagara County
OneidaZone Two (Mid)4.4Radon is a major problem in Oneida County
OnondagaZone One (High)4.2Radon is a major problem in Onondaga County
OntarioZone One (High)4.3Radon is a major problem in Ontario County
OrangeZone One (High)3.8Radon is a major problem in Orange County
OrleansZone Two (Mid)3.1Radon is a problem in Orleans County
OswegoZone Two (Mid)2.5Radon is a problem in Oswego County
OtsegoZone One (High)5.9Radon is a major problem in Otsego County
PutnamZone One (High)3.8Radon is a major problem in Putnam County
QueensZone Three (Low)1.8Radon is a minor problem in Queens County
RensselaerZone One (High)4.3Radon is a major problem in Rensselaer County
RichmondZone Three (Low)1.7Radon is a minor problem in Richmond County
RocklandZone Three (Low)2.4Radon is a problem in Rockland County
Saint Lawrence
(St. Lawrence)
Zone Two (Mid)2.8Radon is a problem in Saint Lawrence County
SaratogaZone Two (Mid)3.1Radon is a problem in Saratoga County
SchenectadyZone Two (Mid)2.6Radon is a problem in Schenectady County
SchoharieZone One (High)4.0Radon is a major problem in Schoharie County
SchuylerZone One (High)5.7Radon is a major problem in Schuyler County
SenecaZone One (High)5.0Radon is a major problem in Seneca County
SteubenZone One (High)6.7Radon is a major problem in Steuben County
SuffolkZone Three (Low)1.8Radon is a minor problem in Suffolk County
SullivanZone One (High)2.5Radon is a major problem in Sullivan County
TiogaZone One (High)6.1Radon is a major problem in Tioga County
TompkinsZone One (High)3.6Radon is a major problem in Tompkins County
UlsterZone One (High)3.8Radon is a major problem in Ulster County
WarrenZone Three (Low)2.5Radon is a problem in Warren County
WashingtonZone One (High)3.6Radon is a major problem in Washington County
WayneZone Two (Mid)3.6Radon is a problem in Wayne County
WestchesterZone Three (Low)2.5Radon is a problem in Westchester County
WyomingZone One (High)5.7Radon is a major problem in Wyoming County
YatesZone One (High)3.3Radon is a major problem in Yates County

Is Radon a Problem in North Carolina?

County NameEPA Zone Designation
(1=High, 2=Mid, 3=Low)
Average Radon
Level (pCi/L)
Is Radon a Problem in this County?
AlamanceZone Three (Low)0.6Radon is a minor problem in Alamance County
AlexanderZone Two (Mid)8.6Radon is an extreme problem in Alexander County
AlleghanyZone One (High)5.4Radon is a major problem in Alleghany County
AnsonZone Three (Low)1.0Radon is a minor problem in Anson County
AsheZone Two (Mid)3.3Radon is a problem in Ashe County
AveryZone Two (Mid)5.1Radon is a problem in Avery County
BeaufortZone Three (Low)0.6Radon is a minor problem in Beaufort County
BertieZone Three (Low)1.2Radon is a minor problem in Bertie County
BladenZone Three (Low)0.5Radon is a minor problem in Bladen County
BrunswickZone Three (Low)0.4Radon is a minor problem in Brunswick County
BuncombeZone One (High)3.4Radon is a major problem in Buncombe County
BurkeZone Two (Mid)3.4Radon is a problem in Burke County
CabarrusZone Three (Low)1.7Radon is a minor problem in Cabarrus County
CaldwellZone Two (Mid)3.4Radon is a problem in Caldwell County
CamdenZone Three (Low)1.5Radon is a minor problem in Camden County
CarteretZone Three (Low)0.4Radon is a minor problem in Carteret County
CaswellZone Two (Mid)2.8Radon is a problem in Caswell County
CatawbaZone Two (Mid)2.5Radon is a problem in Catawba County
ChathamZone Three (Low)1.1Radon is a minor problem in Chatham County
CherokeeZone One (High)4.7Radon is a major problem in Cherokee County
ChowanZone Three (Low)0.3Radon is a minor problem in Chowan County
ClayZone Two (Mid)4.1Radon is a major problem in Clay County
ClevelandZone Two (Mid)4.7Radon is a major problem in Cleveland County
ColumbusZone Three (Low)0.4Radon is a minor problem in Columbus County
CravenZone Three (Low)0.6Radon is a minor problem in Craven County
CumberlandZone Three (Low)1.3Radon is a minor problem in Cumberland County
CurrituckZone Three (Low)0.6Radon is a minor problem in Currituck County
DareZone Three (Low)2.4Radon is a problem in Dare County
DavidsonZone Three (Low)2.3Radon is a problem in Davidson County
DavieZone Three (Low)2.4Radon is a problem in Davie County
DuplinZone Three (Low)0.8Radon is a minor problem in Duplin County
DurhamZone Three (Low)1.3Radon is a minor problem in Durham County
EdgecombeZone Three (Low)1.4Radon is a minor problem in Edgecombe County
ForsythZone Two (Mid)3.5Radon is a problem in Forsyth County
FranklinZone Two (Mid)1.8Radon is a problem in Franklin County
GastonZone Two (Mid)2.7Radon is a problem in Gaston County
GatesZone Three (Low)0.2Radon is a minor problem in Gates County
GrahamZone Two (Mid)5.3Radon is a major problem in Graham County
GranvilleZone Three (Low)1.5Radon is a minor problem in Granville County
GreeneZone Three (Low)1.1Radon is a minor problem in Greene County
GuilfordZone Three (Low)1.5Radon is a minor problem in Guilford County
HalifaxZone Three (Low)3.3Radon is a problem in Halifax County
HarnettZone Three (Low)0.7Radon is a minor problem in Harnett County
HaywoodZone Two (Mid)3.9Radon is a problem in Haywood County
HendersonZone One (High)5.4Radon is a major problem in Henderson County
HertfordZone Three (Low)1.3Radon is a minor problem in Hertford County
HokeZone Three (Low)1.1Radon is a minor problem in Hoke County
HydeZone Three (Low)0.6Radon is a minor problem in Hyde County
IredellZone Two (Mid)2.3Radon is a problem in Iredell County
JacksonZone Two (Mid)2.9Radon is a problem in Jackson County
JohnstonZone Three (Low)1.2Radon is a minor problem in Johnston County
JonesZone Three (Low)0.8Radon is a minor problem in Jones County
LeeZone Three (Low)1.0Radon is a minor problem in Lee County
LenoirZone Three (Low)0.7Radon is a minor problem in Lenoir County
LincolnZone Two (Mid)3.8Radon is a problem in Lincoln County
McDowellZone Two (Mid)4.9Radon is a major problem in McDowell County
MaconZone Two (Mid)2.2Radon is a problem in Macon County
MadisonZone Two (Mid)2.6Radon is a problem in Madison County
MartinZone Three (Low)8.6Radon is an extreme problem in Martin County
MecklenburgZone Three (Low)1.4Radon is a minor problem in Mecklenburg County
MitchellZone One (High)2.9Radon is a major problem in Mitchell County
MontgomeryZone Three (Low)1.9Radon is a minor problem in Montgomery County
MooreZone Three (Low)1.3Radon is a minor problem in Moore County
NashZone Three (Low)0.9Radon is a minor problem in Nash County
New HanoverZone Three (Low)1.0Radon is a minor problem in New Hanover County
NorthamptonZone Three (Low)5.8Radon is a major problem in Northampton County
OnslowZone Three (Low)1.4Radon is a minor problem in Onslow County
OrangeZone Three (Low)1.7Radon is a minor problem in Orange County
PamlicoZone Three (Low)No DataRadon is a minor problem in Pamlico County
PasquotankZone Three (Low)0.8Radon is a minor problem in Pasquotank County
PenderZone Three (Low)0.4Radon is a minor problem in Pender County
PerquimansZone Three (Low)0.3Radon is a minor problem in Perquimans County
PersonZone Three (Low)1.7Radon is a minor problem in Person County
PittZone Three (Low)0.7Radon is a minor problem in Pitt County
PolkZone Two (Mid)3.6Radon is a problem in Polk County
RandolphZone Three (Low)1.5Radon is a minor problem in Randolph County
RichmondZone Three (Low)0.8Radon is a minor problem in Richmond County
RobesonZone Three (Low)0.5Radon is a minor problem in Robeson County
RockinghamZone One (High)3.7Radon is a major problem in Rockingham County
RowanZone Three (Low)2.1Radon is a problem in Rowan County
RutherfordZone Two (Mid)3.2Radon is a problem in Rutherford County
SampsonZone Three (Low)0.2Radon is a minor problem in Sampson County
ScotlandZone Three (Low)1.0Radon is a minor problem in Scotland County
StanlyZone Three (Low)2.7Radon is a problem in Stanly County
StokesZone Two (Mid)2.5Radon is a problem in Stokes County
SurryZone Two (Mid)3.6Radon is a problem in Surry County
SwainZone Two (Mid)4.2Radon is a major problem in Swain County
TransylvaniaZone One (High)6.6Radon is a major problem in Transylvania County
TyrrellZone Three (Low)No DataRadon is a minor problem in Tyrrell County
UnionZone Three (Low)1.5Radon is a minor problem in Union County
VanceZone Two (Mid)2.9Radon is a problem in Vance County
WakeZone Two (Mid)1.6Radon is a problem in Wake County
WarrenZone Two (Mid)2.2Radon is a problem in Warren County
WashingtonZone Three (Low)1.8Radon is a minor problem in Washington County
WataugaZone One (High)6.4Radon is a major problem in Watauga County
WayneZone Three (Low)0.7Radon is a minor problem in Wayne County
WilkesZone Two (Mid)3.7Radon is a problem in Wilkes County
WilsonZone Three (Low)0.8Radon is a minor problem in Wilson County
YadkinZone Two (Mid)3.0Radon is a problem in Yadkin County
YanceyZone Two (Mid)3.5Radon is a problem in Yancey County

Is Radon a Problem in North Dakota?

County NameEPA Zone Designation
(1=High, 2=Mid, 3=Low)
Average Radon
Level (pCi/L)
Is Radon a Problem in this County?
AdamsZone One (High)8.9Radon is an extreme problem in Adams County
BarnesZone One (High)6.2Radon is a major problem in Barnes County
BensonZone One (High)5.4Radon is a major problem in Benson County
BillingsZone One (High)4.7Radon is a major problem in Billings County
BottineauZone One (High)7.2Radon is a major problem in Bottineau County
BowmanZone One (High)9.9Radon is an extreme problem in Bowman County
BurkeZone One (High)5.9Radon is a major problem in Burke County
BurleighZone One (High)4.0Radon is a major problem in Burleigh County
CassZone One (High)5.2Radon is a major problem in Cass County
CavalierZone One (High)5.1Radon is a major problem in Cavalier County
DickeyZone One (High)4.5Radon is a major problem in Dickey County
DivideZone One (High)5.3Radon is a major problem in Divide County
DunnZone One (High)7.8Radon is a major problem in Dunn County
EddyZone One (High)4.5Radon is a major problem in Eddy County
EmmonsZone One (High)6.1Radon is a major problem in Emmons County
FosterZone One (High)6.5Radon is a major problem in Foster County
Golden ValleyZone One (High)3.6Radon is a major problem in Golden Valley County
Grand ForksZone One (High)6.6Radon is a major problem in Grand Forks County
GrantZone One (High)8.2Radon is an extreme problem in Grant County
GriggsZone One (High)4.7Radon is a major problem in Griggs County
HettingerZone One (High)8.6Radon is an extreme problem in Hettinger County
KidderZone One (High)5.4Radon is a major problem in Kidder County
LaMoureZone One (High)5.7Radon is a major problem in LaMoure County
LoganZone One (High)6.2Radon is a major problem in Logan County
McHenryZone One (High)5.4Radon is a major problem in McHenry County
McIntoshZone One (High)5.9Radon is a major problem in McIntosh County
McKenzieZone One (High)5.7Radon is a major problem in McKenzie County
McLeanZone One (High)5.7Radon is a major problem in McLean County
MercerZone One (High)7.2Radon is a major problem in Mercer County
MortonZone One (High)6.0Radon is a major problem in Morton County
MountrailZone One (High)8.6Radon is an extreme problem in Mountrail County
NelsonZone One (High)6.0Radon is a major problem in Nelson County
OliverZone One (High)3.6Radon is a major problem in Oliver County
PembinaZone One (High)9.9Radon is an extreme problem in Pembina County
PierceZone One (High)4.2Radon is a major problem in Pierce County
RamseyZone One (High)5.5Radon is a major problem in Ramsey County
RansomZone One (High)8.4Radon is an extreme problem in Ransom County
RenvilleZone One (High)4.3Radon is a major problem in Renville County
RichlandZone One (High)4.4Radon is a major problem in Richland County
RoletteZone One (High)6.5Radon is a major problem in Rolette County
SargentZone One (High)5.2Radon is a major problem in Sargent County
SheridanZone One (High)6.2Radon is a major problem in Sheridan County
SiouxZone One (High)2.4Radon is a major problem in Sioux County
SlopeZone One (High)13.2Radon is an extreme problem in Slope County
StarkZone One (High)8.8Radon is an extreme problem in Stark County
SteeleZone One (High)3.5Radon is a major problem in Steele County
StutsmanZone One (High)6.0Radon is a major problem in Stutsman County
TownerZone One (High)5.2Radon is a major problem in Towner County
TraillZone One (High)5.1Radon is a major problem in Traill County
WalshZone One (High)9.7Radon is an extreme problem in Walsh County
WardZone One (High)5.1Radon is a major problem in Ward County
WellsZone One (High)4.2Radon is a major problem in Wells County
WilliamsZone One (High)4.3Radon is a major problem in Williams County

Is Radon a Problem in Ohio?

County NameEPA Zone Designation
(1=High, 2=Mid, 3=Low)
Average Radon
Level (pCi/L)
Is Radon a Problem in this County?
AdamsZone One (High)6.7Radon is a major problem in Adams County
AllenZone One (High)6.3Radon is a major problem in Allen County
AshlandZone One (High)8.6Radon is an extreme problem in Ashland County
AshtabulaZone Two (Mid)4.4Radon is a major problem in Ashtabula County
AthensZone Two (Mid)4.9Radon is a major problem in Athens County
AuglaizeZone One (High)7.8Radon is a major problem in Auglaize County
BelmontZone One (High)6.8Radon is a major problem in Belmont County
BrownZone Two (Mid)1.9Radon is a problem in Brown County
ButlerZone One (High)5.0Radon is a major problem in Butler County
CarrollZone One (High)13.0Radon is an extreme problem in Carroll County
ChampaignZone One (High)9.1Radon is an extreme problem in Champaign County
ClarkZone One (High)8.0Radon is an extreme problem in Clark County
ClermontZone Two (Mid)4.4Radon is a major problem in Clermont County
ClintonZone One (High)6.4Radon is a major problem in Clinton County
ColumbianaZone One (High)9.8Radon is an extreme problem in Columbiana County
CoshoctonZone One (High)13.0Radon is an extreme problem in Coshocton County
CrawfordZone One (High)6.7Radon is a major problem in Crawford County
CuyahogaZone Two (Mid)2.7Radon is a problem in Cuyahoga County
DarkeZone One (High)7.8Radon is a major problem in Darke County
DefianceZone Two (Mid)1.8Radon is a problem in Defiance County
DelawareZone One (High)6.2Radon is a major problem in Delaware County
ErieZone Two (Mid)6.4Radon is a major problem in Erie County
FairfieldZone One (High)7.2Radon is a major problem in Fairfield County
FayetteZone One (High)4.8Radon is a major problem in Fayette County
FranklinZone One (High)8.3Radon is an extreme problem in Franklin County
FultonZone Two (Mid)3.6Radon is a problem in Fulton County
GalliaZone Two (Mid)2.0Radon is a problem in Gallia County
GeaugaZone Two (Mid)2.7Radon is a problem in Geauga County
GreeneZone One (High)7.3Radon is a major problem in Greene County
GuernseyZone One (High)6.1Radon is a major problem in Guernsey County
HamiltonZone One (High)3.4Radon is a major problem in Hamilton County
HancockZone One (High)5.0Radon is a major problem in Hancock County
HardinZone One (High)4.7Radon is a major problem in Hardin County
HarrisonZone One (High)13.2Radon is an extreme problem in Harrison County
HenryZone Two (Mid)3.6Radon is a problem in Henry County
HighlandZone Two (Mid)3.8Radon is a problem in Highland County
HockingZone Two (Mid)5.2Radon is a major problem in Hocking County
HolmesZone One (High)9.3Radon is an extreme problem in Holmes County
HuronZone One (High)9.5Radon is an extreme problem in Huron County
JacksonZone Two (Mid)3.4Radon is a problem in Jackson County
JeffersonZone One (High)11.8Radon is an extreme problem in Jefferson County
KnoxZone One (High)24.6Radon is an extreme problem in Knox County
LakeZone Two (Mid)3.5Radon is a problem in Lake County
LawrenceZone Two (Mid)7.3Radon is a major problem in Lawrence County
LickingZone One (High)16.3Radon is an extreme problem in Licking County
LoganZone One (High)13.8Radon is an extreme problem in Logan County
LorainZone Two (Mid)4.2Radon is a major problem in Lorain County
LucasZone Two (Mid)2.3Radon is a problem in Lucas County
MadisonZone One (High)7.0Radon is a major problem in Madison County
MahoningZone Two (Mid)2.9Radon is a problem in Mahoning County
MarionZone One (High)7.0Radon is a major problem in Marion County
MedinaZone Two (Mid)3.5Radon is a problem in Medina County
MeigsZone Two (Mid)2.5Radon is a problem in Meigs County
MercerZone One (High)7.1Radon is a major problem in Mercer County
MiamiZone One (High)8.7Radon is an extreme problem in Miami County
MonroeZone Two (Mid)3.6Radon is a problem in Monroe County
MontgomeryZone One (High)5.7Radon is a major problem in Montgomery County
MorganZone Two (Mid)3.4Radon is a problem in Morgan County
MorrowZone One (High)7.0Radon is a major problem in Morrow County
MuskingumZone One (High)7.2Radon is a major problem in Muskingum County
NobleZone Two (Mid)2.7Radon is a problem in Noble County
OttawaZone Two (Mid)3.8Radon is a problem in Ottawa County
PauldingZone Two (Mid)2.1Radon is a problem in Paulding County
PerryZone One (High)10.3Radon is an extreme problem in Perry County
PickawayZone One (High)10.9Radon is an extreme problem in Pickaway County
PikeZone One (High)7.1Radon is a major problem in Pike County
PortageZone Two (Mid)4.1Radon is a major problem in Portage County
PrebleZone One (High)7.9Radon is a major problem in Preble County
PutnamZone Two (Mid)5.9Radon is a major problem in Putnam County
RichlandZone One (High)10.4Radon is an extreme problem in Richland County
RossZone One (High)12.1Radon is an extreme problem in Ross County
SanduskyZone Two (Mid)5.8Radon is a major problem in Sandusky County
SciotoZone Two (Mid)3.8Radon is a problem in Scioto County
SenecaZone One (High)6.7Radon is a major problem in Seneca County
ShelbyZone One (High)7.0Radon is a major problem in Shelby County
StarkZone One (High)7.4Radon is a major problem in Stark County
SummitZone One (High)4.3Radon is a major problem in Summit County
TrumbullZone Two (Mid)2.5Radon is a problem in Trumbull County
TuscarawasZone One (High)9.6Radon is an extreme problem in Tuscarawas County
UnionZone One (High)5.1Radon is a major problem in Union County
Van WertZone One (High)4.2Radon is a major problem in Van Wert County
VintonZone Two (Mid)3.4Radon is a problem in Vinton County
WarrenZone One (High)4.7Radon is a major problem in Warren County
WashingtonZone Two (Mid)6.2Radon is a major problem in Washington County
WayneZone One (High)11.2Radon is an extreme problem in Wayne County
WilliamsZone Two (Mid)4.6Radon is a major problem in Williams County
WoodZone Two (Mid)3.1Radon is a problem in Wood County
WyandotZone One (High)5.2Radon is a major problem in Wyandot County

Is Radon a Problem in Oklahoma?

County NameEPA Zone Designation
(1=High, 2=Mid, 3=Low)
Average Radon
Level (pCi/L)
Is Radon a Problem in this County?
AdairZone Two (Mid)2.7Radon is a problem in Adair County
AlfalfaZone Three (Low)1.1Radon is a minor problem in Alfalfa County
AtokaZone Three (Low)No DataRadon is a minor problem in Atoka County
BeaverZone Two (Mid)3.1Radon is a problem in Beaver County
BeckhamZone Three (Low)3.3Radon is a problem in Beckham County
BlaineZone Three (Low)1.4Radon is a minor problem in Blaine County
BryanZone Three (Low)1.0Radon is a minor problem in Bryan County
CaddoZone Three (Low)1.5Radon is a minor problem in Caddo County
CanadianZone Three (Low)7.7Radon is a major problem in Canadian County
CarterZone Three (Low)4.8Radon is a major problem in Carter County
CherokeeZone Two (Mid)5.9Radon is a major problem in Cherokee County
ChoctawZone Three (Low)3.3Radon is a problem in Choctaw County
CimarronZone Two (Mid)5.0Radon is a major problem in Cimarron County
ClevelandZone Three (Low)1.2Radon is a minor problem in Cleveland County
CoalZone Three (Low)No DataRadon is a minor problem in Coal County
ComancheZone Three (Low)0.5Radon is a minor problem in Comanche County
CottonZone Three (Low)No DataRadon is a minor problem in Cotton County
CraigZone Three (Low)3.5Radon is a problem in Craig County
CreekZone Three (Low)0.8Radon is a minor problem in Creek County
CusterZone Three (Low)0.8Radon is a minor problem in Custer County
DelawareZone Two (Mid)8.5Radon is an extreme problem in Delaware County
DeweyZone Three (Low)6.3Radon is a major problem in Dewey County
EllisZone Two (Mid)2.4Radon is a problem in Ellis County
GarfieldZone Three (Low)3.1Radon is a problem in Garfield County
GarvinZone Three (Low)0.8Radon is a minor problem in Garvin County
GradyZone Three (Low)1.2Radon is a minor problem in Grady County
GrantZone Three (Low)1.2Radon is a minor problem in Grant County
GreerZone Three (Low)No DataRadon is a minor problem in Greer County
HarmonZone Three (Low)No DataRadon is a minor problem in Harmon County
HarperZone Three (Low)No DataRadon is a minor problem in Harper County
HaskellZone Three (Low)1.0Radon is a minor problem in Haskell County
HughesZone Three (Low)1.1Radon is a minor problem in Hughes County
JacksonZone Three (Low)1.8Radon is a minor problem in Jackson County
JeffersonZone Three (Low)No DataRadon is a minor problem in Jefferson County
JohnstonZone Three (Low)29.9Radon is an extreme problem in Johnston County
KayZone Three (Low)2.0Radon is a problem in Kay County
KingfisherZone Three (Low)0.7Radon is a minor problem in Kingfisher County
KiowaZone Three (Low)2.3Radon is a problem in Kiowa County
LatimerZone Three (Low)1.3Radon is a minor problem in Latimer County
Le FloreZone Three (Low)2.1Radon is a problem in Le Flore County
LincolnZone Three (Low)0.3Radon is a minor problem in Lincoln County
LoganZone Three (Low)1.3Radon is a minor problem in Logan County
LoveZone Three (Low)No DataRadon is a minor problem in Love County
McClainZone Three (Low)2.5Radon is a problem in McClain County
McCurtainZone Three (Low)1.7Radon is a minor problem in McCurtain County
McIntoshZone Three (Low)0.9Radon is a minor problem in McIntosh County
MajorZone Three (Low)2.2Radon is a problem in Major County
MarshallZone Three (Low)1.3Radon is a minor problem in Marshall County
MayesZone Two (Mid)9.3Radon is an extreme problem in Mayes County
MurrayZone Three (Low)1.3Radon is a minor problem in Murray County
MuskogeeZone Three (Low)0.7Radon is a minor problem in Muskogee County
NobleZone Three (Low)1.1Radon is a minor problem in Noble County
NowataZone Three (Low)3.7Radon is a problem in Nowata County
OkfuskeeZone Three (Low)No DataRadon is a minor problem in Okfuskee County
OklahomaZone Three (Low)1.4Radon is a minor problem in Oklahoma County
OkmulgeeZone Three (Low)0.7Radon is a minor problem in Okmulgee County
OsageZone Three (Low)0.8Radon is a minor problem in Osage County
OttawaZone Three (Low)5.0Radon is a major problem in Ottawa County
PawneeZone Three (Low)1.3Radon is a minor problem in Pawnee County
PayneZone Three (Low)1.5Radon is a minor problem in Payne County
PittsburgZone Three (Low)0.5Radon is a minor problem in Pittsburg County
PontotocZone Three (Low)2.2Radon is a problem in Pontotoc County
PottawatomieZone Three (Low)0.4Radon is a minor problem in Pottawatomie County
PushmatahaZone Three (Low)0.6Radon is a minor problem in Pushmataha County
Roger MillsZone Three (Low)3.2Radon is a problem in Roger Mills County
RogersZone Three (Low)3.2Radon is a problem in Rogers County
SeminoleZone Three (Low)0.6Radon is a minor problem in Seminole County
SequoyahZone Two (Mid)1.3Radon is a minor problem in Sequoyah County
StephensZone Three (Low)2.5Radon is a problem in Stephens County
TexasZone Two (Mid)5.6Radon is a major problem in Texas County
TillmanZone Three (Low)0.7Radon is a minor problem in Tillman County
TulsaZone Three (Low)1.2Radon is a minor problem in Tulsa County
WagonerZone Three (Low)1.1Radon is a minor problem in Wagoner County
WashingtonZone Three (Low)1.0Radon is a minor problem in Washington County
WashitaZone Three (Low)3.1Radon is a problem in Washita County
WoodsZone Three (Low)0.9Radon is a minor problem in Woods County
WoodwardZone Three (Low)1.7Radon is a minor problem in Woodward County

Is Radon a Problem in Oregon?

County NameEPA Zone Designation
(1=High, 2=Mid, 3=Low)
Average Radon
Level (pCi/L)
Is Radon a Problem in this County?
BakerZone Two (Mid)4.5Radon is a major problem in Baker County
BentonZone Three (Low)2.3Radon is a problem in Benton County
ClackamasZone Three (Low)2.8Radon is a problem in Clackamas County
ClatsopZone Two (Mid)3.5Radon is a problem in Clatsop County
ColumbiaZone Two (Mid)3.8Radon is a problem in Columbia County
CoosZone Three (Low)1.4Radon is a minor problem in Coos County
Crook Zone Two (Mid)0.7Radon is a problem in Crook County
CurryZone Three (Low)1.0Radon is a minor problem in Curry County
DeschutesZone Three (Low)1.3Radon is a minor problem in Deschutes County
DouglasZone Three (Low)1.0Radon is a minor problem in Douglas County
GilliamZone Two (Mid)3.1Radon is a problem in Gilliam County
GrantZone Two (Mid)2.3Radon is a problem in Grant County
Harney Zone Two (Mid)2.3Radon is a problem in Harney County
Hood RiverZone Two (Mid)4.1Radon is a major problem in Hood River County
JacksonZone Three (Low)1.1Radon is a minor problem in Jackson County
JeffersonZone Two (Mid)1.2Radon is a problem in Jefferson County
JosephineZone Three (Low)1.0Radon is a minor problem in Josephine County
KlamathZone Two (Mid)0.6Radon is a problem in Klamath County
LakeZone Two (Mid)1.6Radon is a problem in Lake County
LaneZone Three (Low)1.6Radon is a minor problem in Lane County
Lincoln Zone Three (Low)1.2Radon is a minor problem in Lincoln County
LinnZone Three (Low)1.3Radon is a minor problem in Linn County
MalheurZone Two (Mid)1.8Radon is a problem in Malheur County
MarionZone Three (Low)2.9Radon is a problem in Marion County
MorrowZone Two (Mid)1.2Radon is a problem in Morrow County
MultnomahZone Two (Mid)3.7Radon is a problem in Multnomah County
Polk Zone Three (Low)4.6Radon is a major problem in Polk County
ShermanZone Two (Mid)9.3Radon is an extreme problem in Sherman County
TillamookZone Three (Low)2.4Radon is a problem in Tillamook County
UmatillaZone Two (Mid)3.3Radon is a problem in Umatilla County
UnionZone Two (Mid)3.7Radon is a problem in Union County
WallowaZone Three (Low)2.2Radon is a problem in Wallowa County
WascoZone Two (Mid)1.9Radon is a problem in Wasco County
WashingtonZone Two (Mid)1.9Radon is a problem in Washington County
WheelerZone Two (Mid)0.8Radon is a problem in Wheeler County
YamhillZone Two (Mid)2.6Radon is a problem in Yamhill County

Is Radon a Problem in Pennsylvania?

County NameEPA Zone Designation
(1=High, 2=Mid, 3=Low)
Average Radon
Level (pCi/L)
Is Radon a Problem in this County?
AdamsZone One (High)7.1Radon is a major problem in Adams County
AlleghenyZone One (High)6.4Radon is a major problem in Allegheny County
ArmstrongZone One (High)9.0Radon is an extreme problem in Armstrong County
BeaverZone One (High)9.0Radon is an extreme problem in Beaver County
BedfordZone One (High)9.8Radon is an extreme problem in Bedford County
BerksZone One (High)10.2Radon is an extreme problem in Berks County
BlairZone One (High)6.3Radon is a major problem in Blair County
BradfordZone One (High)7.3Radon is a major problem in Bradford County
BucksZone One (High)5.3Radon is a major problem in Bucks County
ButlerZone One (High)8.9Radon is an extreme problem in Butler County
CambriaZone Two (Mid)6.7Radon is a major problem in Cambria County
CameronZone One (High)9.2Radon is an extreme problem in Cameron County
CarbonZone One (High)10.7Radon is an extreme problem in Carbon County
CentreZone One (High)11.5Radon is an extreme problem in Centre County
ChesterZone One (High)6.9Radon is a major problem in Chester County
ClarionZone One (High)9.1Radon is an extreme problem in Clarion County
ClearfieldZone One (High)9.0Radon is an extreme problem in Clearfield County
ClintonZone One (High)8.3Radon is an extreme problem in Clinton County
ColumbiaZone One (High)17.5Radon is an extreme problem in Columbia County
CrawfordZone Two (Mid)5.1Radon is a major problem in Crawford County
CumberlandZone One (High)10.7Radon is an extreme problem in Cumberland County
DauphinZone One (High)12.9Radon is an extreme problem in Dauphin County
DelawareZone One (High)3.9Radon is a major problem in Delaware County
ElkZone Two (Mid)7.5Radon is a major problem in Elk County
ErieZone Two (Mid)4.6Radon is a major problem in Erie County
FayetteZone Two (Mid)4.1Radon is a major problem in Fayette County
ForestZone One (High)11.1Radon is an extreme problem in Forest County
FranklinZone One (High)9.6Radon is an extreme problem in Franklin County
FultonZone One (High)14.4Radon is an extreme problem in Fulton County
GreeneZone Two (Mid)8.2Radon is an extreme problem in Greene County
HuntingdonZone One (High)10.1Radon is an extreme problem in Huntingdon County
IndianaZone One (High)5.9Radon is a major problem in Indiana County
JeffersonZone Two (Mid)10.5Radon is an extreme problem in Jefferson County
JuniataZone One (High)12.1Radon is an extreme problem in Juniata County
LackawannaZone One (High)4.1Radon is a major problem in Lackawanna County
LancasterZone One (High)12.4Radon is an extreme problem in Lancaster County
LawrenceZone Two (Mid)4.4Radon is a major problem in Lawrence County
LebanonZone One (High)13.6Radon is an extreme problem in Lebanon County
LehighZone One (High)10.5Radon is an extreme problem in Lehigh County
LuzerneZone One (High)4.7Radon is a major problem in Luzerne County
LycomingZone One (High)12.8Radon is an extreme problem in Lycoming County
McKeanZone Two (Mid)14.5Radon is an extreme problem in McKean County
MercerZone Two (Mid)3.7Radon is a problem in Mercer County
MifflinZone One (High)11.2Radon is an extreme problem in Mifflin County
MonroeZone One (High)7.9Radon is a major problem in Monroe County
MontgomeryZone One (High)4.3Radon is a major problem in Montgomery County
MontourZone One (High)14.5Radon is an extreme problem in Montour County
NorthamptonZone One (High)8.7Radon is an extreme problem in Northampton County
NorthumberlandZone One (High)12.9Radon is an extreme problem in Northumberland County
PerryZone One (High)15.4Radon is an extreme problem in Perry County
PhiladelphiaZone Three (Low)2.8Radon is a problem in Philadelphia County
PikeZone Two (Mid)5.2Radon is a major problem in Pike County
PotterZone Two (Mid)20.5Radon is an extreme problem in Potter County
SchuylkillZone One (High)12.4Radon is an extreme problem in Schuylkill County
SnyderZone One (High)12.4Radon is an extreme problem in Snyder County
SomersetZone Two (Mid)9.8Radon is an extreme problem in Somerset County
SullivanZone One (High)5.4Radon is a major problem in Sullivan County
SusquehannaZone One (High)5.0Radon is a major problem in Susquehanna County
TiogaZone One (High)5.1Radon is a major problem in Tioga County
UnionZone One (High)10.7Radon is an extreme problem in Union County
VenangoZone One (High)10.3Radon is an extreme problem in Venango County
WarrenZone Two (Mid)9.6Radon is an extreme problem in Warren County
WashingtonZone Two (Mid)5.7Radon is a major problem in Washington County
WayneZone Two (Mid)3.4Radon is a problem in Wayne County
WestmorelandZone One (High)6.2Radon is a major problem in Westmoreland County
WyomingZone One (High)5.5Radon is a major problem in Wyoming County
YorkZone One (High)11.1Radon is an extreme problem in York County

Is Radon a Problem in Rhode Island?

County NameEPA Zone Designation
(1=High, 2=Mid, 3=Low)
Average Radon
Level (pCi/L)
Is Radon a Problem in this County?
BristolZone Three (Low)1.8Radon is a minor problem in Bristol County
KentZone One (High)3.2Radon is a major problem in Kent County
NewportZone Two (Mid)3.4Radon is a problem in Newport County
ProvidenceZone Two (Mid)2.3Radon is a problem in Providence County
WashingtonZone One (High)4.7Radon is a major problem in Washington County

Is Radon a Problem in South Carolina?

County NameEPA Zone Designation
(1=High, 2=Mid, 3=Low)
Average Radon
Level (pCi/L)
Is Radon a Problem in this County?
AbbevilleZone Two (Mid)1.9Radon is a problem in Abbeville County
AikenZone Three (Low)2.1Radon is a problem in Aiken County
AllendaleZone Three (Low)0.5Radon is a minor problem in Allendale County
AndersonZone Two (Mid)1.8Radon is a problem in Anderson County
BambergZone Three (Low)1.6Radon is a minor problem in Bamberg County
BarnwellZone Three (Low)1.0Radon is a minor problem in Barnwell County
BeaufortZone Three (Low)0.8Radon is a minor problem in Beaufort County
BerkeleyZone Three (Low)1.0Radon is a minor problem in Berkeley County
CalhounZone Three (Low)0.9Radon is a minor problem in Calhoun County
CharlestonZone Three (Low)0.8Radon is a minor problem in Charleston County
CherokeeZone Two (Mid)2.6Radon is a problem in Cherokee County
ChesterZone Three (Low)1.1Radon is a minor problem in Chester County
ChesterfieldZone Three (Low)1.1Radon is a minor problem in Chesterfield County
ClarendonZone Three (Low)1.1Radon is a minor problem in Clarendon County
ColletonZone Three (Low)0.4Radon is a minor problem in Colleton County
DarlingtonZone Three (Low)0.7Radon is a minor problem in Darlington County
DillonZone Three (Low)0.3Radon is a minor problem in Dillon County
DorchesterZone Three (Low)1.0Radon is a minor problem in Dorchester County
EdgefieldZone Three (Low)1.5Radon is a minor problem in Edgefield County
FairfieldZone Three (Low)2.1Radon is a problem in Fairfield County
FlorenceZone Three (Low)0.6Radon is a minor problem in Florence County
GeorgetownZone Three (Low)0.4Radon is a minor problem in Georgetown County
GreenvilleZone One (High)3.1Radon is a major problem in Greenville County
GreenwoodZone Three (Low)1.5Radon is a minor problem in Greenwood County
HamptonZone Three (Low)0.7Radon is a minor problem in Hampton County
HorryZone Three (Low)0.5Radon is a minor problem in Horry County
JasperZone Three (Low)0.2Radon is a minor problem in Jasper County
KershawZone Three (Low)0.9Radon is a minor problem in Kershaw County
LancasterZone Three (Low)2.2Radon is a problem in Lancaster County
LaurensZone Two (Mid)2.2Radon is a problem in Laurens County
LeeZone Three (Low)0.6Radon is a minor problem in Lee County
LexingtonZone Three (Low)1.7Radon is a minor problem in Lexington County
McCormickZone Three (Low)2.2Radon is a problem in McCormick County
MarionZone Three (Low)0.7Radon is a minor problem in Marion County
MarlboroZone Three (Low)0.5Radon is a minor problem in Marlboro County
NewberryZone Three (Low)0.9Radon is a minor problem in Newberry County
OconeeZone Two (Mid)4.0Radon is a major problem in Oconee County
OrangeburgZone Three (Low)0.9Radon is a minor problem in Orangeburg County
PickensZone Two (Mid)2.8Radon is a problem in Pickens County
RichlandZone Three (Low)1.1Radon is a minor problem in Richland County
SaludaZone Three (Low)0.6Radon is a minor problem in Saluda County
SpartanburgZone Two (Mid)2.5Radon is a problem in Spartanburg County
SumterZone Three (Low)0.7Radon is a minor problem in Sumter County
UnionZone Three (Low)1.8Radon is a minor problem in Union County
WilliamsburgZone Three (Low)1.5Radon is a minor problem in Williamsburg County
YorkZone Two (Mid)1.6Radon is a problem in York County

Is Radon a Problem in South Dakota?

County NameEPA Zone Designation
(1=High, 2=Mid, 3=Low)
Average Radon
Level (pCi/L)
Is Radon a Problem in this County?
AuroraZone One (High)3.5Radon is a major problem in Aurora County
BeadleZone One (High)5.0Radon is a major problem in Beadle County
BennettZone Two (Mid)5.8Radon is a major problem in Bennett County
Bon HommeZone One (High)7.6Radon is a major problem in Bon Homme County
BrookingsZone One (High)6.8Radon is a major problem in Brookings County
BrownZone One (High)5.7Radon is a major problem in Brown County
BruleZone One (High)9.4Radon is an extreme problem in Brule County
BuffaloZone One (High)3.7Radon is a major problem in Buffalo County
ButteZone Two (Mid)9.5Radon is an extreme problem in Butte County
CampbellZone One (High)7.0Radon is a major problem in Campbell County
Charles MixZone One (High)9.3Radon is an extreme problem in Charles Mix County
ClarkZone One (High)5.3Radon is a major problem in Clark County
ClayZone One (High)6.1Radon is a major problem in Clay County
CodingtonZone One (High)7.4Radon is a major problem in Codington County
CorsonZone One (High)6.5Radon is a major problem in Corson County
CusterZone Two (Mid)24.3Radon is an extreme problem in Custer County
DavisonZone One (High)5.7Radon is a major problem in Davison County
DayZone One (High)6.0Radon is a major problem in Day County
DeuelZone One (High)9.2Radon is an extreme problem in Deuel County
DeweyZone Two (Mid)5.8Radon is a major problem in Dewey County
DouglasZone One (High)7.4Radon is a major problem in Douglas County
EdmundsZone One (High)5.7Radon is a major problem in Edmunds County
Fall RiverZone Two (Mid)5.5Radon is a major problem in Fall River County
FaulkZone One (High)8.9Radon is an extreme problem in Faulk County
GrantZone One (High)7.4Radon is a major problem in Grant County
GregoryZone Two (Mid)5.8Radon is a major problem in Gregory County
HaakonZone Two (Mid)8.6Radon is an extreme problem in Haakon County
HamlinZone One (High)7.2Radon is a major problem in Hamlin County
HandZone One (High)4.6Radon is a major problem in Hand County
HansonZone One (High)5.9Radon is a major problem in Hanson County
HardingZone Two (Mid)6.6Radon is a major problem in Harding County
HughesZone One (High)6.1Radon is a major problem in Hughes County
HutchinsonZone One (High)7.7Radon is a major problem in Hutchinson County
HydeZone One (High)3.3Radon is a major problem in Hyde County
JacksonZone Two (Mid)0.9Radon is a problem in Jackson County
JerauldZone One (High)6.4Radon is a major problem in Jerauld County
JonesZone Two (Mid)19.4Radon is an extreme problem in Jones County
KingsburyZone One (High)5.7Radon is a major problem in Kingsbury County
LakeZone One (High)10.6Radon is an extreme problem in Lake County
LawrenceZone Two (Mid)10.5Radon is an extreme problem in Lawrence County
LincolnZone One (High)6.2Radon is a major problem in Lincoln County
LymanZone One (High)9.0Radon is an extreme problem in Lyman County
McCookZone One (High)6.6Radon is a major problem in McCook County
McPhersonZone One (High)8.1Radon is an extreme problem in McPherson County
MarshallZone One (High)7.6Radon is a major problem in Marshall County
MeadeZone Two (Mid)6.7Radon is a major problem in Meade County
MelletteZone Two (Mid)2.7Radon is a problem in Mellette County
MinerZone One (High)10.6Radon is an extreme problem in Miner County
MinnehahaZone One (High)7.1Radon is a major problem in Minnehaha County
MoodyZone One (High)7.2Radon is a major problem in Moody County
PenningtonZone Two (Mid)16.0Radon is an extreme problem in Pennington County
PerkinsZone One (High)5.9Radon is a major problem in Perkins County
PotterZone One (High)3.2Radon is a major problem in Potter County
RobertsZone One (High)5.3Radon is a major problem in Roberts County
SanbornZone One (High)6.4Radon is a major problem in Sanborn County
ShannonZone Two (Mid)1.6Radon is a problem in Shannon County
SpinkZone One (High)4.5Radon is a major problem in Spink County
StanleyZone One (High)4.3Radon is a major problem in Stanley County
SullyZone One (High)5.2Radon is a major problem in Sully County
ToddZone Two (Mid)1.3Radon is a problem in Todd County
TrippZone Two (Mid)6.0Radon is a major problem in Tripp County
TurnerZone One (High)11.1Radon is an extreme problem in Turner County
UnionZone One (High)6.3Radon is a major problem in Union County
WalworthZone One (High)5.6Radon is a major problem in Walworth County
YanktonZone One (High)9.7Radon is an extreme problem in Yankton County
ZiebachZone Two (Mid)10.0Radon is an extreme problem in Ziebach County

Is Radon a Problem in Tennessee?

County NameEPA Zone Designation
(1=High, 2=Mid, 3=Low)
Average Radon
Level (pCi/L)
Is Radon a Problem in this County?
AndersonZone One (High)8.3Radon is an extreme problem in Anderson County
BedfordZone One (High)2.7Radon is a major problem in Bedford County
BentonZone Two (Mid)1.9Radon is a problem in Benton County
BledsoeZone Three (Low)2.5Radon is a problem in Bledsoe County
BlountZone One (High)4.6Radon is a major problem in Blount County
BradleyZone One (High)2.6Radon is a major problem in Bradley County
CampbellZone Three (Low)7.2Radon is a major problem in Campbell County
CannonZone Two (Mid)2.6Radon is a problem in Cannon County
CarrollZone Three (Low)1.6Radon is a minor problem in Carroll County
CarterZone Two (Mid)4.5Radon is a major problem in Carter County
CheathamZone Two (Mid)3.7Radon is a problem in Cheatham County
ChesterZone Two (Mid)1.0Radon is a problem in Chester County
ClaiborneZone One (High)6.4Radon is a major problem in Claiborne County
ClayZone Two (Mid)3.9Radon is a problem in Clay County
CockeZone Two (Mid)4.4Radon is a major problem in Cocke County
CoffeeZone Two (Mid)4.4Radon is a major problem in Coffee County
CrockettZone Three (Low)1.0Radon is a minor problem in Crockett County
CumberlandZone Three (Low)1.5Radon is a minor problem in Cumberland County
DavidsonZone One (High)5.3Radon is a major problem in Davidson County
DecaturZone Two (Mid)2.3Radon is a problem in Decatur County
DeKalbZone Two (Mid)3.4Radon is a problem in DeKalb County
DicksonZone Two (Mid)3.7Radon is a problem in Dickson County
DyerZone Three (Low)1.4Radon is a minor problem in Dyer County
FayetteZone Three (Low)1.8Radon is a minor problem in Fayette County
FentressZone Two (Mid)2.2Radon is a problem in Fentress County
FranklinZone Three (Low)4.0Radon is a major problem in Franklin County
GibsonZone Three (Low)1.7Radon is a minor problem in Gibson County
GilesZone One (High)5.5Radon is a major problem in Giles County
GraingerZone One (High)3.5Radon is a major problem in Grainger County
GreeneZone One (High)4.5Radon is a major problem in Greene County
GrundyZone Three (Low)1.5Radon is a minor problem in Grundy County
HamblenZone One (High)5.8Radon is a major problem in Hamblen County
HamiltonZone Two (Mid)2.7Radon is a problem in Hamilton County
HancockZone One (High)2.7Radon is a major problem in Hancock County
HardemanZone Three (Low)1.3Radon is a minor problem in Hardeman County
HardinZone Two (Mid)1.4Radon is a problem in Hardin County
HawkinsZone One (High)4.6Radon is a major problem in Hawkins County
HaywoodZone Three (Low)0.7Radon is a minor problem in Haywood County
HendersonZone Two (Mid)2.5Radon is a problem in Henderson County
HenryZone Three (Low)2.0Radon is a problem in Henry County
HickmanZone One (High)3.6Radon is a major problem in Hickman County
HoustonZone Two (Mid)4.1Radon is a major problem in Houston County
HumphreysZone One (High)2.9Radon is a major problem in Humphreys County
JacksonZone One (High)8.8Radon is an extreme problem in Jackson County
JeffersonZone One (High)6.0Radon is a major problem in Jefferson County
JohnsonZone Two (Mid)4.3Radon is a major problem in Johnson County
KnoxZone One (High)4.1Radon is a major problem in Knox County
LakeZone Three (Low)0.6Radon is a minor problem in Lake County
LauderdaleZone Three (Low)1.1Radon is a minor problem in Lauderdale County
LawrenceZone One (High)3.5Radon is a major problem in Lawrence County
LewisZone One (High)3.0Radon is a major problem in Lewis County
LincolnZone One (High)2.9Radon is a major problem in Lincoln County
LoudonZone One (High)6.5Radon is a major problem in Loudon County
McMinnZone One (High)3.7Radon is a major problem in McMinn County
McNairyZone Two (Mid)1.1Radon is a minor problem in McNairy County
MaconZone Two (Mid)2.6Radon is a problem in Macon County
MadisonZone Three (Low)1.7Radon is a minor problem in Madison County
MarionZone Three (Low)3.3Radon is a problem in Marion County
MarshallZone One (High)2.9Radon is a major problem in Marshall County
MauryZone One (High)4.0Radon is a major problem in Maury County
MeigsZone One (High)2.9Radon is a major problem in Meigs County
MonroeZone One (High)5.0Radon is a major problem in Monroe County
MontgomeryZone Two (Mid)4.8Radon is a major problem in Montgomery County
MooreZone One (High)3.6Radon is a major problem in Moore County
MorganZone Three (Low)5.0Radon is a major problem in Morgan County
ObionZone Three (Low)1.8Radon is a minor problem in Obion County
OvertonZone Two (Mid)7.9Radon is a major problem in Overton County
PerryZone One (High)6.5Radon is a major problem in Perry County
PickettZone Two (Mid)3.9Radon is a problem in Pickett County
PolkZone Two (Mid)3.7Radon is a problem in Polk County
PutnamZone Two (Mid)4.5Radon is a major problem in Putnam County
RheaZone Three (Low)3.3Radon is a problem in Rhea County
RoaneZone One (High)4.4Radon is a major problem in Roane County
RobertsonZone Two (Mid)3.7Radon is a problem in Robertson County
RutherfordZone One (High)2.6Radon is a major problem in Rutherford County
ScottZone Three (Low)2.3Radon is a problem in Scott County
SequatchieZone Three (Low)2.3Radon is a problem in Sequatchie County
SevierZone Two (Mid)4.7Radon is a major problem in Sevier County
ShelbyZone Three (Low)1.4Radon is a minor problem in Shelby County
SmithZone One (High)5.0Radon is a major problem in Smith County
StewartZone Two (Mid)3.2Radon is a problem in Stewart County
SullivanZone One (High)5.8Radon is a major problem in Sullivan County
SumnerZone Two (Mid)3.7Radon is a problem in Sumner County
TiptonZone Three (Low)1.7Radon is a minor problem in Tipton County
TrousdaleZone One (High)3.8Radon is a major problem in Trousdale County
UnicoiZone Two (Mid)5.7Radon is a major problem in Unicoi County
UnionZone One (High)3.6Radon is a major problem in Union County
Van BurenZone Two (Mid)5.1Radon is a major problem in Van Buren County
WarrenZone Two (Mid)7.6Radon is a major problem in Warren County
WashingtonZone One (High)5.3Radon is a major problem in Washington County
WayneZone One (High)2.9Radon is a major problem in Wayne County
WeakleyZone Three (Low)1.4Radon is a minor problem in Weakley County
WhiteZone Two (Mid)6.6Radon is a major problem in White County
WilliamsonZone One (High)3.6Radon is a major problem in Williamson County
WilsonZone One (High)2.5Radon is a major problem in Wilson County

Is Radon a Problem in Texas?

County NameEPA Zone Designation
(1=High, 2=Mid, 3=Low)
Average Radon
Level (pCi/L)
Is Radon a Problem in this County?
AndersonZone Three (Low)0.5Radon is a minor problem in Anderson County
AndrewsZone Three (Low)0.8Radon is a minor problem in Andrews County
AngelinaZone Three (Low)0.1Radon is a minor problem in Angelina County
AransasZone Three (Low)1.0Radon is a minor problem in Aransas County
ArcherZone Three (Low)2.1Radon is a problem in Archer County
ArmstrongZone Two (Mid)6.7Radon is a major problem in Armstrong County
AtascosaZone Three (Low)1.9Radon is a minor problem in Atascosa County
AustinZone Three (Low)0.3Radon is a minor problem in Austin County
BaileyZone Two (Mid)2.9Radon is a problem in Bailey County
BanderaZone Three (Low)No DataRadon is a minor problem in Bandera County
BastropZone Three (Low)11.3Radon is an extreme problem in Bastrop County
BaylorZone Three (Low)2.3Radon is a problem in Baylor County
BeeZone Three (Low)0.4Radon is a minor problem in Bee County
BellZone Three (Low)1.9Radon is a minor problem in Bell County
BexarZone Three (Low)0.7Radon is a minor problem in Bexar County
BlancoZone Three (Low)No DataRadon is a minor problem in Blanco County
BordenZone Three (Low)No DataRadon is a minor problem in Borden County
BosqueZone Three (Low)0.6Radon is a minor problem in Bosque County
BowieZone Three (Low)0.5Radon is a minor problem in Bowie County
BrazoriaZone Three (Low)0.4Radon is a minor problem in Brazoria County
BrazosZone Three (Low)0.2Radon is a minor problem in Brazos County
BrewsterZone Two (Mid)5.6Radon is a major problem in Brewster County
BriscoeZone Three (Low)No DataRadon is a minor problem in Briscoe County
BrooksZone Three (Low)No DataRadon is a minor problem in Brooks County
BrownZone Three (Low)3.0Radon is a problem in Brown County
BurlesonZone Three (Low)0.3Radon is a minor problem in Burleson County
BurnetZone Three (Low)1.6Radon is a minor problem in Burnet County
CaldwellZone Three (Low)1.0Radon is a minor problem in Caldwell County
CalhounZone Three (Low)0.5Radon is a minor problem in Calhoun County
CallahanZone Three (Low)No DataRadon is a minor problem in Callahan County
CameronZone Three (Low)1.6Radon is a minor problem in Cameron County
CampZone Three (Low)No DataRadon is a minor problem in Camp County
CarsonZone Two (Mid)4.7Radon is a major problem in Carson County
CassZone Three (Low)No DataRadon is a minor problem in Cass County
CastroZone Two (Mid)7.7Radon is a major problem in Castro County
ChambersZone Three (Low)No DataRadon is a minor problem in Chambers County
CherokeeZone Three (Low)No DataRadon is a minor problem in Cherokee County
ChildressZone Three (Low)4.5Radon is a major problem in Childress County
ClayZone Three (Low)1.0Radon is a minor problem in Clay County
CochranZone Three (Low)No DataRadon is a minor problem in Cochran County
CokeZone Three (Low)No DataRadon is a minor problem in Coke County
ColemanZone Three (Low)1.5Radon is a minor problem in Coleman County
CollinZone Three (Low)1.6Radon is a minor problem in Collin County
CollingsworthZone Three (Low)1.6Radon is a minor problem in Collingsworth County
ColoradoZone Three (Low)0.8Radon is a minor problem in Colorado County
ComalZone Three (Low)1.7Radon is a minor problem in Comal County
ComancheZone Three (Low)No DataRadon is a minor problem in Comanche County
ConchoZone Three (Low)No DataRadon is a minor problem in Concho County
CookeZone Three (Low)1.5Radon is a minor problem in Cooke County
CoryellZone Three (Low)No DataRadon is a minor problem in Coryell County
CottleZone Three (Low)0.9Radon is a minor problem in Cottle County
CraneZone Three (Low)No DataRadon is a minor problem in Crane County
CrockettZone Three (Low)2.5Radon is a problem in Crockett County
CrosbyZone Two (Mid)2.9Radon is a problem in Crosby County
CulbersonZone Two (Mid)3.2Radon is a problem in Culberson County
DallamZone Two (Mid)2.0Radon is a problem in Dallam County
DallasZone Three (Low)2.5Radon is a problem in Dallas County
DawsonZone Three (Low)2.8Radon is a problem in Dawson County
Deaf SmithZone Two (Mid)6.2Radon is a major problem in Deaf Smith County
DeltaZone Three (Low)No DataRadon is a minor problem in Delta County
DentonZone Three (Low)2.6Radon is a problem in Denton County
DeWittZone Three (Low)1.2Radon is a minor problem in DeWitt County
DickensZone Three (Low)No DataRadon is a minor problem in Dickens County
DimmitZone Three (Low)0.9Radon is a minor problem in Dimmit County
DonleyZone Two (Mid)4.0Radon is a major problem in Donley County
DuvalZone Three (Low)No DataRadon is a minor problem in Duval County
EastlandZone Three (Low)0.8Radon is a minor problem in Eastland County
EctorZone Three (Low)3.1Radon is a problem in Ector County
EdwardsZone Three (Low)No DataRadon is a minor problem in Edwards County
EllisZone Three (Low)65.2Radon is an extreme problem in Ellis County
El PasoZone Three (Low)7.5Radon is a major problem in El Paso County
ErathZone Three (Low)0.5Radon is a minor problem in Erath County
FallsZone Three (Low)0.8Radon is a minor problem in Falls County
FanninZone Three (Low)0.3Radon is a minor problem in Fannin County
FayetteZone Three (Low)0.6Radon is a minor problem in Fayette County
FisherZone Three (Low)No DataRadon is a minor problem in Fisher County
FloydZone Two (Mid)3.4Radon is a problem in Floyd County
FoardZone Three (Low)No DataRadon is a minor problem in Foard County
Fort BendZone Three (Low)0.8Radon is a minor problem in Fort Bend County
FranklinZone Three (Low)0.2Radon is a minor problem in Franklin County
FreestoneZone Three (Low)No DataRadon is a minor problem in Freestone County
FrioZone Three (Low)No DataRadon is a minor problem in Frio County
GainesZone Three (Low)No DataRadon is a minor problem in Gaines County
GalvestonZone Three (Low)0.4Radon is a minor problem in Galveston County
GarzaZone Two (Mid)3.5Radon is a problem in Garza County
GillespieZone Three (Low)0.6Radon is a minor problem in Gillespie County
GlasscockZone Three (Low)0.9Radon is a minor problem in Glasscock County
GoliadZone Three (Low)0.7Radon is a minor problem in Goliad County
GonzalesZone Three (Low)0.5Radon is a minor problem in Gonzales County
GrayZone Two (Mid)6.4Radon is a major problem in Gray County
GraysonZone Three (Low)1.3Radon is a minor problem in Grayson County
GreggZone Three (Low)1.2Radon is a minor problem in Gregg County
GrimesZone Three (Low)1.4Radon is a minor problem in Grimes County
GuadalupeZone Three (Low)1.8Radon is a minor problem in Guadalupe County
HaleZone Two (Mid)6.6Radon is a major problem in Hale County
HallZone Three (Low)No DataRadon is a minor problem in Hall County
HamiltonZone Three (Low)0.1Radon is a minor problem in Hamilton County
HansfordZone Two (Mid)4.0Radon is a problem in Hansford County
HardemanZone Three (Low)2.2Radon is a problem in Hardeman County
HardinZone Three (Low)No DataRadon is a minor problem in Hardin County
HarrisZone Three (Low)0.7Radon is a minor problem in Harris County
HarrisonZone Three (Low)0.4Radon is a minor problem in Harrison County
HartleyZone Two (Mid)No DataRadon is a problem in Hartley County
HaskellZone Three (Low)0.7Radon is a minor problem in Haskell County
HaysZone Three (Low)1.0Radon is a minor problem in Hays County
HemphillZone Two (Mid)1.2Radon is a problem in Hemphill County
HendersonZone Three (Low)1.5Radon is a minor problem in Henderson County
HidalgoZone Three (Low)0.3Radon is a minor problem in Hidalgo County
HillZone Three (Low)0.3Radon is a minor problem in Hill County
HockleyZone Two (Mid)No DataRadon is a problem in Hockley County
HoodZone Three (Low)0.6Radon is a minor problem in Hood County
HopkinsZone Three (Low)0.3Radon is a minor problem in Hopkins County
HoustonZone Three (Low)No DataRadon is a minor problem in Houston County
HowardZone Three (Low)1.6Radon is a minor problem in Howard County
HudspethZone Two (Mid)No DataRadon is a problem in Hudspeth County
HuntZone Three (Low)1.9Radon is a minor problem in Hunt County
HutchinsonZone Two (Mid)1.1Radon is a problem in Hutchinson County
IrionZone Three (Low)No DataRadon is a minor problem in Irion County
JackZone Three (Low)No DataRadon is a minor problem in Jack County
JacksonZone Three (Low)No DataRadon is a minor problem in Jackson County
JasperZone Three (Low)No DataRadon is a minor problem in Jasper County
Jeff DavisZone Two (Mid)7.5Radon is a major problem in Jeff Davis County
JeffersonZone Three (Low)0.3Radon is a minor problem in Jefferson County
Jim HoggZone Three (Low)No DataRadon is a minor problem in Jim Hogg County
Jim WellsZone Three (Low)No DataRadon is a minor problem in Jim Wells County
JohnsonZone Three (Low)0.4Radon is a minor problem in Johnson County
JonesZone Three (Low)2.6Radon is a problem in Jones County
KarnesZone Three (Low)No DataRadon is a minor problem in Karnes County
KaufmanZone Three (Low)1.4Radon is a minor problem in Kaufman County
KendallZone Three (Low)0.9Radon is a minor problem in Kendall County
KenedyZone Three (Low)No DataRadon is a minor problem in Kenedy County
KentZone Three (Low)No DataRadon is a minor problem in Kent County
KerrZone Three (Low)2.0Radon is a problem in Kerr County
KimbleZone Three (Low)No DataRadon is a minor problem in Kimble County
KingZone Three (Low)No DataRadon is a minor problem in King County
KinneyZone Three (Low)No DataRadon is a minor problem in Kinney County
KlebergZone Three (Low)0.5Radon is a minor problem in Kleberg County
KnoxZone Three (Low)No DataRadon is a minor problem in Knox County
LamarZone Three (Low)0.5Radon is a minor problem in Lamar County
LambZone Two (Mid)No DataRadon is a minor problem in Lamb County
LampasasZone Three (Low)No DataRadon is a minor problem in Lampasas County
La SalleZone Three (Low)No DataRadon is a minor problem in La Salle County
LavacaZone Three (Low)0.3Radon is a minor problem in Lavaca County
LeeZone Three (Low)0.8Radon is a minor problem in Lee County
LeonZone Three (Low)0.8Radon is a minor problem in Leon County
LibertyZone Three (Low)2.3Radon is a problem in Liberty County
LimestoneZone Three (Low)0.2Radon is a minor problem in Limestone County
LipscombZone Two (Mid)7.6Radon is a major problem in Lipscomb County
Live OakZone Three (Low)No DataRadon is a minor problem in Live Oak County
LlanoZone Two (Mid)1.7Radon is a problem in Llano County
LovingZone Three (Low)No DataRadon is a minor problem in Loving County
LubbockZone Two (Mid)3.3Radon is a problem in Lubbock County
LynnZone Two (Mid)No DataRadon is a problem in Lynn County
McCullochZone Three (Low)0.6Radon is a minor problem in McCulloch County
McLennanZone Three (Low)0.7Radon is a minor problem in McLennan County
McMullenZone Three (Low)No DataRadon is a minor problem in McMullen County
MadisonZone Three (Low)1.5Radon is a minor problem in Madison County
MarionZone Three (Low)No DataRadon is a minor problem in Marion County
MartinZone Three (Low)1.7Radon is a minor problem in Martin County
MasonZone Two (Mid)1.4Radon is a problem in Mason County
MatagordaZone Three (Low)1.4Radon is a minor problem in Matagorda County
MaverickZone Three (Low)No DataRadon is a minor problem in Maverick County
MedinaZone Three (Low)0.5Radon is a minor problem in Medina County
MenardZone Three (Low)0.9Radon is a minor problem in Menard County
MidlandZone Three (Low)1.0Radon is a minor problem in Midland County
MilamZone Three (Low)1.6Radon is a minor problem in Milam County
MillsZone Three (Low)No DataRadon is a minor problem in Mills County
MitchellZone Three (Low)No DataRadon is a minor problem in Mitchell County
MontagueZone Three (Low)1.9Radon is a minor problem in Montague County
MontgomeryZone Three (Low)1.3Radon is a minor problem in Montgomery County
MooreZone Two (Mid)3.0Radon is a problem in Moore County
MorrisZone Three (Low)0.6Radon is a minor problem in Morris County
MotleyZone Three (Low)No DataRadon is a minor problem in Motley County
NacogdochesZone Three (Low)1.7Radon is a minor problem in Nacogdoches County
NavarroZone Three (Low)0.5Radon is a minor problem in Navarro County
NewtonZone Three (Low)2.0Radon is a problem in Newton County
NolanZone Three (Low)2.0Radon is a problem in Nolan County
NuecesZone Three (Low)0.5Radon is a minor problem in Nueces County
OchiltreeZone Two (Mid)7.7Radon is a major problem in Ochiltree County
OldhamZone Two (Mid)7.3Radon is a major problem in Oldham County
OrangeZone Three (Low)0.4Radon is a minor problem in Orange County
Palo PintoZone Three (Low)No DataRadon is a minor problem in Palo Pinto County
PanolaZone Three (Low)0.4Radon is a minor problem in Panola County
ParkerZone Three (Low)0.8Radon is a minor problem in Parker County
ParmerZone Two (Mid)9.4Radon is an extreme problem in Parmer County
PecosZone Three (Low)0.9Radon is a minor problem in Pecos County
PolkZone Three (Low)0.1Radon is a minor problem in Polk County
PotterZone Two (Mid)3.8Radon is a problem in Potter County
PresidioZone Two (Mid)2.6Radon is a problem in Presidio County
RainsZone Three (Low)3.4Radon is a problem in Rains County
RandallZone Two (Mid)8.1Radon is an extreme problem in Randall County
ReaganZone Three (Low)No DataRadon is a minor problem in Reagan County
RealZone Three (Low)1.7Radon is a minor problem in Real County
Red RiverZone Three (Low)No DataRadon is a minor problem in Red River County
ReevesZone Two (Mid)No DataRadon is a problem in Reeves County
RefugioZone Three (Low)No DataRadon is a minor problem in Refugio County
RobertsZone Two (Mid)3.4Radon is a problem in Roberts County
RobertsonZone Three (Low)0.4Radon is a minor problem in Robertson County
RockwallZone Three (Low)No DataRadon is a minor problem in Rockwall County
RunnelsZone Three (Low)0.4Radon is a minor problem in Runnels County
RuskZone Three (Low)1.2Radon is a minor problem in Rusk County
SabineZone Three (Low)No DataRadon is a minor problem in Sabine County
San AugustineZone Three (Low)No DataRadon is a minor problem in San Augustine County
San JacintoZone Three (Low)2.5Radon is a problem in San Jacinto County
San PatricioZone Three (Low)0.6Radon is a minor problem in San Patricio County
San SabaZone Three (Low)No DataRadon is a minor problem in San Saba County
SchleicherZone Three (Low)No DataRadon is a minor problem in Schleicher County
ScurryZone Three (Low)5.6Radon is a major problem in Scurry County
ShackelfordZone Three (Low)No DataRadon is a minor problem in Shackelford County
ShelbyZone Three (Low)No DataRadon is a minor problem in Shelby County
ShermanZone Two (Mid)2.2Radon is a problem in Sherman County
SmithZone Three (Low)1.3Radon is a minor problem in Smith County
SomervellZone Three (Low)No DataRadon is a minor problem in Somervell County
StarrZone Three (Low)1.1Radon is a minor problem in Starr County
StephensZone Three (Low)6.3Radon is a major problem in Stephens County
SterlingZone Three (Low)No DataRadon is a minor problem in Sterling County
StonewallZone Three (Low)No DataRadon is a minor problem in Stonewall County
SuttonZone Three (Low)No DataRadon is a minor problem in Sutton County
SwisherZone Two (Mid)7.0Radon is a major problem in Swisher County
TarrantZone Three (Low)1.5Radon is a minor problem in Tarrant County
TaylorZone Three (Low)1.3Radon is a minor problem in Taylor County
TerrellZone Two (Mid)1.0Radon is a problem in Terrell County
TerryZone Three (Low)1.9Radon is a minor problem in Terry County
ThrockmortonZone Three (Low)No DataRadon is a minor problem in Throckmorton County
TitusZone Three (Low)0.3Radon is a minor problem in Titus County
Tom GreenZone Three (Low)0.7Radon is a minor problem in Tom Green County
TravisZone Three (Low)2.8Radon is a problem in Travis County
TrinityZone Three (Low)0.6Radon is a minor problem in Trinity County
TylerZone Three (Low)0.8Radon is a minor problem in Tyler County
UpshurZone Three (Low)1.2Radon is a minor problem in Upshur County
UptonZone Three (Low)No DataRadon is a minor problem in Upton County
UvaldeZone Three (Low)No DataRadon is a minor problem in Uvalde County
Val VerdeZone Three (Low)1.6Radon is a minor problem in Val Verde County
Van ZandtZone Three (Low)0.4Radon is a minor problem in Van Zandt County
VictoriaZone Three (Low)0.4Radon is a minor problem in Victoria County
WalkerZone Three (Low)0.4Radon is a minor problem in Walker County
WallerZone Three (Low)No DataRadon is a minor problem in Waller County
WardZone Three (Low)0.6Radon is a minor problem in Ward County
WashingtonZone Three (Low)1.1Radon is a minor problem in Washington County
WebbZone Three (Low)0.6Radon is a minor problem in Webb County
WhartonZone Three (Low)No DataRadon is a minor problem in Wharton County
WheelerZone Three (Low)2.0Radon is a problem in Wheeler County
WichitaZone Three (Low)0.6Radon is a minor problem in Wichita County
WilbargerZone Three (Low)2.4Radon is a problem in Wilbarger County
WillacyZone Three (Low)0.5Radon is a minor problem in Willacy County
WilliamsonZone Three (Low)1.8Radon is a minor problem in Williamson County
WilsonZone Three (Low)No DataRadon is a minor problem in Wilson County
WinklerZone Three (Low)0.6Radon is a minor problem in Winkler County
WiseZone Three (Low)0.6Radon is a minor problem in Wise County
WoodZone Three (Low)0.2Radon is a minor problem in Wood County
YoakumZone Three (Low)1.3Radon is a minor problem in Yoakum County
YoungZone Three (Low)1.3Radon is a minor problem in Young County
ZapataZone Three (Low)No DataRadon is a minor problem in Zapata County
ZavalaZone Three (Low)No DataRadon is a minor problem in Zavala County

Is Radon a Problem in Utah?

County NameEPA Zone Designation
(1=High, 2=Mid, 3=Low)
Average Radon
Level (pCi/L)
Is Radon a Problem in this County?
BeaverZone Two (Mid)26.2Radon is an extreme problem in Beaver County
Box ElderZone Two (Mid)5.5Radon is a major problem in Box Elder County
CacheZone Two (Mid)4.6Radon is a major problem in Cache County
CarbonZone One (High)3.4Radon is a major problem in Carbon County
DaggettZone Two (Mid)4.2Radon is a major problem in Daggett County
DavisZone Two (Mid)3.0Radon is a problem in Davis County
DuchesneZone One (High)2.9Radon is a major problem in Duchesne County
EmeryZone Two (Mid)2.8Radon is a problem in Emery County
GarfieldZone Two (Mid)4.4Radon is a major problem in Garfield County
GrandZone One (High)8.1Radon is an extreme problem in Grand County
IronZone Two (Mid)1.6Radon is a problem in Iron County
JuabZone Two (Mid)6.4Radon is a major problem in Juab County
KaneZone Two (Mid)2.2Radon is a problem in Kane County
MillardZone Two (Mid)3.0Radon is a problem in Millard County
MorganZone Two (Mid)3.6Radon is a problem in Morgan County
PiuteZone One (High)2.1Radon is a major problem in Piute County
RichZone Two (Mid)6.1Radon is a major problem in Rich County
Salt LakeZone Two (Mid)3.8Radon is a problem in Salt Lake County
San JuanZone Two (Mid)3.0Radon is a problem in San Juan County
SanpeteZone One (High)5.3Radon is a major problem in Sanpete County
SevierZone One (High)6.9Radon is a major problem in Sevier County
SummitZone Two (Mid)3.3Radon is a problem in Summit County
TooeleZone Two (Mid)4.1Radon is a major problem in Tooele County
UintahZone One (High)5.0Radon is a major problem in Uintah County
UtahZone Two (Mid)4.7Radon is a major problem in Utah County
WasatchZone Two (Mid)5.7Radon is a major problem in Wasatch County
WashingtonZone Two (Mid)1.8Radon is a problem in Washington County
WayneZone Two (Mid)4.3Radon is a major problem in Wayne County
WeberZone Two (Mid)4.7Radon is a major problem in Weber County

Is Radon a Problem in Vermont?

County NameEPA Zone Designation
(1=High, 2=Mid, 3=Low)
Average Radon
Level (pCi/L)
Is Radon a Problem in this County?
AddisonZone Two (Mid)4.3Radon is a major problem in COUNTY County
BenningtonZone Two (Mid)4.2Radon is a major problem in Bennington County
CaledoniaZone Two (Mid)3.0Radon is a problem in Caledonia County
ChittendenZone Three (Low)2.3Radon is a problem in Chittenden County
EssexZone Two (Mid)4.1Radon is a major problem in Essex County
FranklinZone Two (Mid)2.5Radon is a problem in Franklin County
Grand IsleZone Three (Low)4.7Radon is a major problem in Grand Isle County
LamoilleZone Two (Mid)3.7Radon is a problem in Lamoille County
OrangeZone Two (Mid)3.9Radon is a problem in Orange County
OrleansZone Two (Mid)3.8Radon is a problem in Orleans County
RutlandZone Two (Mid)3.2Radon is a problem in Rutland County
WashingtonZone Two (Mid)3.5Radon is a problem in Washington County
WindhamZone Two (Mid)3.2Radon is a problem in Windham County
WindsorZone Two (Mid)4.3Radon is a major problem in Windsor County

Is Radon a Problem in Virginia?

County NameEPA Zone Designation
(1=High, 2=Mid, 3=Low)
Average Radon
Level (pCi/L)
Is Radon a Problem in this County?
AccomackZone Three (Low)0.4Radon is a minor problem in Accomack County
AlbemarleZone Two (Mid)3.0Radon is a problem in Albemarle County
AlleghanyZone One (High)1.2Radon is a major problem in Alleghany County
AmeliaZone One (High)3.1Radon is a major problem in Amelia County
AmherstZone Two (Mid)3.0Radon is a problem in Amherst County
AppomattoxZone One (High)2.4Radon is a major problem in Appomattox County
ArlingtonZone Two (Mid)2.5Radon is a problem in Arlington County
AugustaZone One (High)5.3Radon is a major problem in Augusta County
BathZone One (High)4.5Radon is a major problem in Bath County
BedfordZone Two (Mid)2.4Radon is a problem in Bedford County
BlandZone One (High)3.8Radon is a major problem in Bland County
BotetourtZone One (High)4.2Radon is a major problem in Botetourt County
BrunswickZone One (High)4.3Radon is a major problem in Brunswick County
BuchananZone Two (Mid)2.4Radon is a problem in Buchanan County
BuckinghamZone One (High)4.7Radon is a major problem in Buckingham County
CampbellZone One (High)2.6Radon is a major problem in Campbell County
CarolineZone Three (Low)2.7Radon is a problem in Caroline County
CarrollZone Two (Mid)4.6Radon is a major problem in Carroll County
Charles CityZone Three (Low)1.1Radon is a minor problem in Charles City County
CharlotteZone Two (Mid)3.4Radon is a problem in Charlotte County
ChesterfieldZone Three (Low)3.3Radon is a problem in Chesterfield County
ClarkeZone One (High)5.3Radon is a major problem in Clarke County
CraigZone One (High)4.1Radon is a major problem in Craig County
CulpeperZone Two (Mid)3.6Radon is a problem in Culpeper County
CumberlandZone One (High)3.0Radon is a major problem in Cumberland County
DickensonZone Two (Mid)3.2Radon is a problem in Dickenson County
DinwiddieZone One (High)3.4Radon is a major problem in Dinwiddie County
EssexZone Three (Low)2.3Radon is a problem in Essex County
FairfaxZone One (High)3.1Radon is a major problem in Fairfax County
FauquierZone Two (Mid)2.9Radon is a problem in Fauquier County
FloydZone Two (Mid)4.5Radon is a major problem in Floyd County
FluvannaZone One (High)3.1Radon is a major problem in Fluvanna County
FranklinZone Two (Mid)2.6Radon is a problem in Franklin County
FrederickZone One (High)6.9Radon is a major problem in Frederick County
GilesZone One (High)6.5Radon is a major problem in Giles County
GloucesterZone Three (Low)1.9Radon is a minor problem in Gloucester County
GoochlandZone One (High)3.1Radon is a major problem in Goochland County
GraysonZone Two (Mid)3.3Radon is a problem in Grayson County
GreeneZone Two (Mid)2.5Radon is a problem in Greene County
GreensvilleZone Three (Low)3.0Radon is a problem in Greensville County
HalifaxZone Two (Mid)2.4Radon is a problem in Halifax County
HanoverZone Three (Low)4.7Radon is a major problem in Hanover County
HenricoZone Three (Low)2.8Radon is a problem in Henrico County
HenryZone One (High)3.2Radon is a major problem in Henry County
HighlandZone One (High)8.8Radon is an extreme problem in Highland County
Isle Of WightZone Three (Low)0.5Radon is a minor problem in Isle Of Wight County
James CityZone Three (Low)2.8Radon is a problem in James City County
King And QueenZone Three (Low)4.4Radon is a major problem in King And Queen County
King GeorgeZone Three (Low)3.5Radon is a problem in King George County
King WilliamZone Three (Low)4.1Radon is a major problem in King William County
LancasterZone Three (Low)1.7Radon is a minor problem in Lancaster County
LeeZone One (High)6.4Radon is a major problem in Lee County
LoudounZone Two (Mid)3.8Radon is a problem in Loudoun County
LouisaZone One (High)3.7Radon is a major problem in Louisa County
LunenburgZone Two (Mid)1.3Radon is a minor problem in Lunenburg County
MadisonZone Two (Mid)6.5Radon is a major problem in Madison County
MathewsZone Three (Low)2.4Radon is a problem in Mathews County
MecklenburgZone Two (Mid)3.3Radon is a problem in Mecklenburg County
MiddlesexZone Three (Low)1.1Radon is a minor problem in Middlesex County
MontgomeryZone One (High)3.8Radon is a major problem in Montgomery County
NelsonZone Two (Mid)3.2Radon is a problem in Nelson County
New KentZone Three (Low)1.5Radon is a minor problem in New Kent County
NorthamptonZone Three (Low)0.8Radon is a minor problem in Northampton County
NorthumberlandZone Three (Low)2.9Radon is a problem in Northumberland County
NottowayZone One (High)6.1Radon is a major problem in Nottoway County
OrangeZone One (High)2.7Radon is a major problem in Orange County
PageZone One (High)3.6Radon is a major problem in Page County
PatrickZone One (High)3.4Radon is a major problem in Patrick County
PittsylvaniaZone One (High)3.0Radon is a major problem in Pittsylvania County
PowhatanZone One (High)2.3Radon is a major problem in Powhatan County
Prince EdwardZone Two (Mid)3.1Radon is a problem in Prince Edward County
Prince GeorgeZone Three (Low)8.3Radon is an extreme problem in Prince George County
Prince WilliamZone Two (Mid)2.8Radon is a problem in Prince William County
PulaskiZone One (High)5.7Radon is a major problem in Pulaski County
RappahannockZone Two (Mid)3.4Radon is a problem in Rappahannock County
RichmondZone Three (Low)1.5Radon is a minor problem in Richmond County
RoanokeZone One (High)2.7Radon is a major problem in Roanoke County
RockbridgeZone One (High)5.5Radon is a major problem in Rockbridge County
RockinghamZone One (High)4.1Radon is a major problem in Rockingham County
RussellZone One (High)7.8Radon is a major problem in Russell County
ScottZone One (High)5.0Radon is a major problem in Scott County
ShenandoahZone One (High)3.6Radon is a major problem in Shenandoah County
SmythZone One (High)7.5Radon is a major problem in Smyth County
SouthamptonZone Three (Low)0.5Radon is a minor problem in Southampton County
SpotsylvaniaZone One (High)2.5Radon is a problem in Spotsylvania County
StaffordZone One (High)2.4Radon is a major problem in Stafford County
SurryZone Three (Low)1.0Radon is a minor problem in Surry County
SussexZone Three (Low)No DataRadon is a minor problem in Sussex County
TazewellZone One (High)5.2Radon is a major problem in Tazewell County
WarrenZone One (High)4.4Radon is a major problem in Warren County
WashingtonZone One (High)6.0Radon is a major problem in Washington County
WestmorelandZone Three (Low)1.8Radon is a minor problem in Westmoreland County
WiseZone Two (Mid)5.3Radon is a major problem in Wise County
WytheZone One (High)4.2Radon is a major problem in Wythe County
YorkZone Three (Low)2.5Radon is a problem in York County

Is Radon a Problem in Washington?

County NameEPA Zone Designation
(1=High, 2=Mid, 3=Low)
Average Radon
Level (pCi/L)
Is Radon a Problem in this County?
AdamsZone Two (Mid)9.7Radon is an extreme problem in Adams County
AsotinZone Two (Mid)1.8Radon is a problem in Asotin County
BentonZone Two (Mid)1.8Radon is a problem in Benton County
ChelanZone Three (Low)3.7Radon is a problem in Chelan County
ClallamZone Three (Low)0.5Radon is a minor problem in Clallam County
ClarkZone One (High)2.3Radon is a major problem in Clark County
ColumbiaZone Two (Mid)7.1Radon is a major problem in Columbia County
CowlitzZone Three (Low)1.6Radon is a minor problem in Cowlitz County
DouglasZone Two (Mid)3.9Radon is a problem in Douglas County
FerryZone One (High)5.7Radon is a major problem in Ferry County
FranklinZone Two (Mid)2.7Radon is a problem in Franklin County
GarfieldZone Two (Mid)4.3Radon is a major problem in Garfield County
GrantZone Two (Mid)4.1Radon is a major problem in Grant County
Grays HarborZone Three (Low)0.5Radon is a minor problem in Grays Harbor County
IslandZone Three (Low)0.8Radon is a minor problem in Island County
JeffersonZone Three (Low)1.9Radon is a minor problem in Jefferson County
KingZone Three (Low)1.1Radon is a minor problem in King County
KitsapZone Three (Low)0.3Radon is a minor problem in Kitsap County
KittitasZone Two (Mid)1.0Radon is a problem in Kittitas County
KlickitatZone Two (Mid)7.8Radon is a major problem in Klickitat County
LewisZone Three (Low)2.2Radon is a problem in Lewis County
LincolnZone Two (Mid)4.8Radon is a major problem in Lincoln County
MasonZone Three (Low)0.7Radon is a minor problem in Mason County
OkanoganZone One (High)5.0Radon is a major problem in Okanogan County
PacificZone Three (Low)3.7Radon is a problem in Pacific County
Pend OreilleZone One (High)5.8Radon is a major problem in Pend Oreille County
PierceZone Three (Low)1.4Radon is a minor problem in Pierce County
San JuanZone Three (Low)0.7Radon is a minor problem in San Juan County
SkagitZone Three (Low)0.4Radon is a minor problem in Skagit County
SkamaniaZone One (High)2.6Radon is a major problem in Skamania County
SnohomishZone Three (Low)0.4Radon is a minor problem in Snohomish County
SpokaneZone One (High)8.5Radon is an extreme problem in Spokane County
StevensZone One (High)8.4Radon is an extreme problem in Stevens County
ThurstonZone Three (Low)1.4Radon is a minor problem in Thurston County
WahkiakumZone Three (Low)1.6Radon is a minor problem in Wahkiakum County
Walla WallaZone Two (Mid)4.3Radon is a major problem in Walla Walla County
WhatcomZone Three (Low)1.3Radon is a minor problem in Whatcom County
WhitmanZone Two (Mid)3.2Radon is a problem in Whitman County
YakimaZone Two (Mid)1.6Radon is a problem in Yakima County

Is Radon a Problem in Washington DC?

County NameEPA Zone Designation
(1=High, 2=Mid, 3=Low)
Average Radon
Level (pCi/L)
Is Radon a Problem in this County?
District of ColumbiaZone Three (Low)1.6Radon is a minor problem in the District of Columbia

Is Radon a Problem in West Virginia?

County NameEPA Zone Designation
(1=High, 2=Mid, 3=Low)
Average Radon
Level (pCi/L)
Is Radon a Problem in this County?
BarbourZone Two (Mid)2.0Radon is a problem in Barbour County
BerkeleyZone One (High)8.4Radon is an extreme problem in Berkeley County
BooneZone Three (Low)1.5Radon is a minor problem in Boone County
BraxtonZone Two (Mid)1.8Radon is a problem in Braxton County
BrookeZone One (High)7.6Radon is a major problem in Brooke County
CabellZone Two (Mid)2.3Radon is a problem in Cabell County
CalhounZone Two (Mid)1.5Radon is a problem in Calhoun County
ClayZone Two (Mid)1.2Radon is a problem in Clay County
DoddridgeZone Two (Mid)2.6Radon is a problem in Doddridge County
FayetteZone Two (Mid)1.9Radon is a problem in Fayette County
GilmerZone Two (Mid)5.5Radon is a major problem in Gilmer County
GrantZone One (High)3.2Radon is a major problem in Grant County
GreenbrierZone One (High)10.5Radon is an extreme problem in Greenbrier County
HampshireZone One (High)8.1Radon is an extreme problem in Hampshire County
HancockZone One (High)7.9Radon is a major problem in Hancock County
HardyZone One (High)4.3Radon is a major problem in Hardy County
HarrisonZone Two (Mid)3.3Radon is a problem in Harrison County
JacksonZone Two (Mid)3.2Radon is a problem in Jackson County
JeffersonZone One (High)7.7Radon is a major problem in Jefferson County
KanawhaZone Three (Low)2.9Radon is a problem in Kanawha County
LewisZone Two (Mid)2.9Radon is a problem in Lewis County
LincolnZone Two (Mid)1.5Radon is a problem in Lincoln County
LoganZone Three (Low)1.9Radon is a minor problem in Logan County
MarionZone Two (Mid)3.8Radon is a problem in Marion County
MarshallZone One (High)4.4Radon is a major problem in Marshall County
MasonZone Two (Mid)2.7Radon is a problem in Mason County
McDowellZone Three (Low)2.4Radon is a problem in McDowell County
MercerZone One (High)3.2Radon is a major problem in Mercer County
MineralZone One (High)5.5Radon is a major problem in Mineral County
MingoZone Three (Low)2.5Radon is a problem in Mingo County
MonongaliaZone One (High)3.4Radon is a major problem in Monongalia County
MonroeZone One (High)3.4Radon is a major problem in Monroe County
MorganZone One (High)12.2Radon is an extreme problem in Morgan County
NicholasZone Three (Low)1.9Radon is a minor problem in Nicholas County
OhioZone One (High)6.7Radon is a major problem in Ohio County
PendletonZone One (High)6.2Radon is a major problem in Pendleton County
PleasantsZone Two (Mid)3.3Radon is a problem in Pleasants County
PocahontasZone One (High)4.4Radon is a major problem in Pocahontas County
PrestonZone One (High)7.4Radon is a major problem in Preston County
PutnamZone Two (Mid)2.6Radon is a problem in Putnam County
RaleighZone Two (Mid)2.4Radon is a problem in Raleigh County
RandolphZone Two (Mid)3.2Radon is a problem in Randolph County
RitchieZone Two (Mid)2.3Radon is a problem in Ritchie County
RoaneZone Two (Mid)2.9Radon is a problem in Roane County
SummersZone One (High)2.8Radon is a major problem in Summers County
TaylorZone Two (Mid)2.8Radon is a problem in Taylor County
TuckerZone Two (Mid)5.2Radon is a major problem in Tucker County
TylerZone Two (Mid)3.1Radon is a problem in Tyler County
UpshurZone Two (Mid)2.1Radon is a problem in Upshur County
WayneZone Two (Mid)1.2Radon is a problem in Wayne County
WebsterZone Two (Mid)3.5Radon is a problem in Webster County
WetzelZone One (High)3.9Radon is a major problem in Wetzel County
WirtZone Two (Mid)2.0Radon is a problem in Wirt County
WoodZone Two (Mid)2.3Radon is a problem in Wood County
WyomingZone Three (Low)3.1Radon is a problem in Wyoming County

Is Radon a Problem in Wisconsin?

County NameEPA Zone Designation
(1=High, 2=Mid, 3=Low)
Average Radon
Level (pCi/L)
Is Radon a Problem in this County?
AdamsZone Two (Mid)2.4Radon is a problem in Adams County
AshlandZone Two (Mid)1.9Radon is a problem in Ashland County
BarronZone Two (Mid)4.4Radon is a major problem in Barron County
BayfieldZone Two (Mid)2.6Radon is a problem in Bayfield County
BrownZone Two (Mid)3.6Radon is a problem in Brown County
BuffaloZone One (High)4.2Radon is a major problem in Buffalo County
BurnettZone Two (Mid)2.6Radon is a problem in Burnett County
CalumetZone Two (Mid)4.6Radon is a major problem in Calumet County
ChippewaZone Two (Mid)4.8Radon is a major problem in Chippewa County
ClarkZone Two (Mid)3.4Radon is a problem in Clark County
ColumbiaZone Two (Mid)3.4Radon is a problem in Columbia County
CrawfordZone One (High)7.2Radon is a major problem in Crawford County
DaneZone One (High)3.3Radon is a major problem in Dane County
DodgeZone One (High)6.0Radon is a major problem in Dodge County
DoorZone One (High)5.5Radon is a major problem in Door County
DouglasZone Two (Mid)2.3Radon is a problem in Douglas County
DunnZone Two (Mid)6.3Radon is a major problem in Dunn County
Eau ClaireZone Two (Mid)5.3Radon is a major problem in Eau Claire County
FlorenceZone Two (Mid)5.6Radon is a major problem in Florence County
Fond Du LacZone One (High)4.6Radon is a major problem in Fond Du Lac County
ForestZone Two (Mid)3.3Radon is a problem in Forest County
GrantZone One (High)5.2Radon is a major problem in Grant County
GreenZone One (High)4.7Radon is a major problem in Green County
Green LakeZone One (High)6.1Radon is a major problem in Green Lake County
IowaZone One (High)6.1Radon is a major problem in Iowa County
IronZone Two (Mid)2.6Radon is a problem in Iron County
JacksonZone Two (Mid)3.1Radon is a problem in Jackson County
JeffersonZone One (High)2.3Radon is a major problem in Jefferson County
JuneauZone Two (Mid)2.9Radon is a problem in Juneau County
KenoshaZone Two (Mid)4.0Radon is a major problem in Kenosha County
KewauneeZone Two (Mid)6.5Radon is a major problem in Kewaunee County
La CrosseZone Two (Mid)3.4Radon is a problem in La Crosse County
LafayetteZone One (High)6.5Radon is a major problem in Lafayette County
LangladeZone One (High)8.1Radon is an extreme problem in Langlade County
LincolnZone Two (Mid)6.3Radon is a major problem in Lincoln County
ManitowocZone Two (Mid)3.7Radon is a problem in Manitowoc County
MarathonZone One (High)12.1Radon is an extreme problem in Marathon County
MarinetteZone Two (Mid)3.0Radon is a problem in Marinette County
MarquetteZone Two (Mid)1.7Radon is a problem in Marquette County
MenomineeZone One (High)4.9Radon is a major problem in Menominee County
MilwaukeeZone Two (Mid)3.4Radon is a problem in Milwaukee County
MonroeZone Two (Mid)2.5Radon is a problem in Monroe County
OcontoZone Two (Mid)7.8Radon is a major problem in Oconto County
OneidaZone Two (Mid)3.4Radon is a problem in Oneida County
OutagamieZone Two (Mid)5.1Radon is a major problem in Outagamie County
OzaukeeZone Two (Mid)3.8Radon is a problem in Ozaukee County
PepinZone One (High)5.2Radon is a major problem in Pepin County
PierceZone One (High)5.8Radon is a major problem in Pierce County
PolkZone Two (Mid)4.4Radon is a major problem in Polk County
PortageZone One (High)5.9Radon is a major problem in Portage County
PriceZone Two (Mid)4.6Radon is a major problem in Price County
RacineZone Two (Mid)5.1Radon is a major problem in Racine County
RichlandZone One (High)3.3Radon is a problem in Richland County
RockZone One (High)4.0Radon is a major problem in Rock County
RuskZone Two (Mid)4.9Radon is a major problem in Rusk County
Saint Croix
(St. Croix)
Zone One (High)4.8Radon is a major problem in Saint Croix County
SaukZone Two (Mid)4.0Radon is a major problem in Sauk County
SawyerZone Two (Mid)3.2Radon is a problem in Sawyer County
ShawanoZone One (High)6.2Radon is a major problem in Shawano County
SheboyganZone Two (Mid)3.9Radon is a problem in Sheboygan County
TaylorZone Two (Mid)3.6Radon is a problem in Taylor County
TrempealeauZone Two (Mid)5.2Radon is a major problem in Trempealeau County
VernonZone One (High)5.8Radon is a major problem in Vernon County
VilasZone Two (Mid)3.7Radon is a problem in Vilas County
WalworthZone One (High)4.8Radon is a major problem in Walworth County
WashburnZone Two (Mid)4.0Radon is a major problem in Washburn County
WashingtonZone One (High)5.5Radon is a major problem in Washington County
WaukeshaZone One (High)5.3Radon is a major problem in Waukesha County
WaupacaZone One (High)7.1Radon is a major problem in Waupaca County
WausharaZone Two (Mid)2.8Radon is a problem in Waushara County
WinnebagoZone Two (Mid)6.3Radon is a major problem in Winnebago County
WoodZone One (High)4.5Radon 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 NameEPA Zone Designation
(1=High, 2=Mid, 3=Low)
Average Radon
Level (pCi/L)
Is Radon a Problem in this County?
AlbanyZone One (High)3.9Radon is a major problem in Albany County
Big HornZone One (High)3.8Radon is a major problem in Big Horn County
CampbellZone One (High)4.3Radon is a major problem in Campbell County
CarbonZone One (High)3.3Radon is a major problem in Carbon County
ConverseZone One (High)6.0Radon is a major problem in Converse County
CrookZone One (High)6.0Radon is a major problem in Crook County
FremontZone One (High)6.6Radon is a major problem in Fremont County
GoshenZone One (High)4.3Radon is a major problem in Goshen County
Hot SpringsZone One (High)5.4Radon is a major problem in Hot Springs County
JohnsonZone One (High)4.2Radon is a major problem in Johnson County
LaramieZone One (High)3.4Radon is a major problem in Laramie County
LincolnZone One (High)9.2Radon is an extreme problem in Lincoln County
NatronaZone One (High)4.7Radon is a major problem in Natrona County
NiobraraZone One (High)3.1Radon is a major problem in Niobrara County
ParkZone One (High)4.6Radon is a major problem in Park County
PlatteZone Two (Mid)3.7Radon is a problem in Platte County
SheridanZone One (High)6.5Radon is a major problem in Sheridan County
SubletteZone One (High)4.1Radon is a major problem in Sublette County
SweetwaterZone One (High)5.6Radon is a major problem in Sweetwater County
TetonZone One (High)6.8Radon is a major problem in Teton County
UintaZone One (High)2.6Radon is a major problem in Uinta County
WashakieZone One (High)3.2Radon is a major problem in Washakie County
WestonZone Two (Mid)8.1Radon is an extreme problem in Weston County

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