Is Radon a Problem Where I Live 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 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 Arizona’s radon levels, as per the EPA and radon.com. If you’d like to see the nationwide data that we collected presented on tables, then you can do so on our article here.

Is Radon a Problem in Apache County?

Radon is a problem in Apache County, Arizona according to its average radon level. Radon levels between 2 and 4 pCi/L are known to cause lung cancer. If you live in a region with this average level of radon, you should test your home’s air immediately. If your results come back and are above 2 pCi/L, you should invest in a radon mitigation system to protect your health. 

The EPA labeled it as a “Zone Two” County. This means that they found radon levels to be between 2 and 4 pCi/L. At these levels, it’s advisable to seek ways to mitigate radon levels in your home. At 2-4 pCi/L, radon is a mid-level threat to your health and is one you shouldn’t ignore. 

Tests from Radon.com find that the average radon level in this county is under 2 pCi/l. While this level of radon can be difficult to mitigate and poses a lower health risk than heightened levels of radon, it is still worth testing your own home’s air for radon. There can be homes with high radon levels even in a region with an overall lower radon average. 

Is Radon a Problem in Cochise County?

Radon is a problem in Cochise County, Arizona according to its average radon level. Radon levels between 2 and 4 pCi/L are known to cause lung cancer. If you live in a region with this average level of radon, you should test your home’s air immediately. If your results come back and are above 2 pCi/L, you should invest in a radon mitigation system to protect your health. 

The EPA labeled it as a “Zone Two” County. This means that they found radon levels to be between 2 and 4 pCi/L. At these levels, it’s advisable to seek ways to mitigate radon levels in your home. At 2-4 pCi/L, radon is a mid-level threat to your health and is one you shouldn’t ignore. 

Tests from Radon.com find the average radon level is between 2 and 4 pCi/L. Radon levels between 2 and 4 pCi/L are known to cause cancer and can be lessened with a radon mitigation system. If you live in a region with this average radon level, then you should test for radon in your home. If your radon level is above 2, then a radon mitigation system can help you protect your health. 

Is Radon a Problem in Coconino County?

Radon is a major problem in Coconino County, Arizona according to its average radon level. Radon levels between 4 and 8 pCi/L are known to cause lung cancer and are a lot more dangerous than lower radon levels. If you live in a region with this heightened average level of radon, you should immediately test your home’s air. If your results come back as anything above 2 pCi/L, you should invest in a radon mitigation system to protect your health. 

The EPA labeled it as a “Zone Two” County. This means that they found radon levels to be between 2 and 4 pCi/L. At these levels, it’s advisable to seek ways to mitigate radon levels in your home. At 2-4 pCi/L, radon is a mid-level threat to your health and is one you shouldn’t ignore. 

Tests from Radon.com find the average radon level is between 4 and 8 pCi/L. Radon levels this high are a greater health risk than lower levels, and can be lessened with a proper radon mitigation system. If you live in a region with this high of an average radon level, then you need to invest in a radon test or a radon detector. Once you get your radon test results back, then you can decide if you need a radon mitigation system or not. If your results come back above 2 pCi/L, then you should get a radon mitigation system.

Is Radon a Problem in Gila County?

Radon is a problem in Gila County, Arizona according to its average radon level. Radon levels between 2 and 4 pCi/L are known to cause lung cancer. If you live in a region with this average level of radon, you should test your home’s air immediately. If your results come back and are above 2 pCi/L, you should invest in a radon mitigation system to protect your health. 

The EPA labeled it as a “Zone Two” County. This means that they found radon levels to be between 2 and 4 pCi/L. At these levels, it’s advisable to seek ways to mitigate radon levels in your home. At 2-4 pCi/L, radon is a mid-level threat to your health and is one you shouldn’t ignore. 

Tests from Radon.com find the average radon level is between 2 and 4 pCi/L. Radon levels between 2 and 4 pCi/L are known to cause cancer and can be lessened with a radon mitigation system. If you live in a region with this average radon level, then you should test for radon in your home. If your radon level is above 2, then a radon mitigation system can help you protect your health. 

Is Radon a Problem in Graham County?

Radon is a problem in Graham County, Arizona according to its average radon level. Radon levels between 2 and 4 pCi/L are known to cause lung cancer. If you live in a region with this average level of radon, you should test your home’s air immediately. If your results come back and are above 2 pCi/L, you should invest in a radon mitigation system to protect your health. 

The EPA labeled it as a “Zone Two” County. This means that they found radon levels to be between 2 and 4 pCi/L. At these levels, it’s advisable to seek ways to mitigate radon levels in your home. At 2-4 pCi/L, radon is a mid-level threat to your health and is one you shouldn’t ignore. 

Tests from Radon.com find that the average radon level in this county is under 2 pCi/l. While this level of radon can be difficult to mitigate and poses a lower health risk than heightened levels of radon, it is still worth testing your own home’s air for radon. There can be homes with high radon levels even in a region with an overall lower radon average. 

Is Radon a Problem in Greenlee County?

Radon is a problem in Greenlee County, Arizona according to its average radon level. Radon levels between 2 and 4 pCi/L are known to cause lung cancer. If you live in a region with this average level of radon, you should test your home’s air immediately. If your results come back and are above 2 pCi/L, you should invest in a radon mitigation system to protect your health. 

The EPA labeled it as a “Zone Two” County. This means that they found radon levels to be between 2 and 4 pCi/L. At these levels, it’s advisable to seek ways to mitigate radon levels in your home. At 2-4 pCi/L, radon is a mid-level threat to your health and is one you shouldn’t ignore. 

Tests from Radon.com find the average radon level is between 2 and 4 pCi/L. Radon levels between 2 and 4 pCi/L are known to cause cancer and can be lessened with a radon mitigation system. If you live in a region with this average radon level, then you should test for radon in your home. If your radon level is above 2, then a radon mitigation system can help you protect your health. 

Is Radon a Problem in La Paz County?

Radon is a problem in La Paz County, Arizona according to its average radon level. Radon levels between 2 and 4 pCi/L are known to cause lung cancer. If you live in a region with this average level of radon, you should test your home’s air immediately. If your results come back and are above 2 pCi/L, you should invest in a radon mitigation system to protect your health. 

The EPA labeled it as a “Zone Two” County. This means that they found radon levels to be between 2 and 4 pCi/L. At these levels, it’s advisable to seek ways to mitigate radon levels in your home. At 2-4 pCi/L, radon is a mid-level threat to your health and is one you shouldn’t ignore. 

Tests from Radon.com find that the average radon level in this county is under 2 pCi/l. While this level of radon can be difficult to mitigate and poses a lower health risk than heightened levels of radon, it is still worth testing your own home’s air for radon. There can be homes with high radon levels even in a region with an overall lower radon average. 

Is Radon a Problem in Maricopa County?

Radon is a problem in Maricopa County, Arizona according to its average radon level. Radon levels between 2 and 4 pCi/L are known to cause lung cancer. If you live in a region with this average level of radon, you should test your home’s air immediately. If your results come back and are above 2 pCi/L, you should invest in a radon mitigation system to protect your health. 

The EPA labeled it as a “Zone Two” County. This means that they found radon levels to be between 2 and 4 pCi/L. At these levels, it’s advisable to seek ways to mitigate radon levels in your home. At 2-4 pCi/L, radon is a mid-level threat to your health and is one you shouldn’t ignore. 

Tests from Radon.com find the average radon level is between 2 and 4 pCi/L. Radon levels between 2 and 4 pCi/L are known to cause cancer and can be lessened with a radon mitigation system. If you live in a region with this average radon level, then you should test for radon in your home. If your radon level is above 2, then a radon mitigation system can help you protect your health. 

Is Radon a Problem in Mohave County?

Radon is a problem in Mohave County, Arizona according to its average radon level. Radon levels between 2 and 4 pCi/L are known to cause lung cancer. If you live in a region with this average level of radon, you should test your home’s air immediately. If your results come back and are above 2 pCi/L, you should invest in a radon mitigation system to protect your health. 

The EPA labeled it as a “Zone Two” County. This means that they found radon levels to be between 2 and 4 pCi/L. At these levels, it’s advisable to seek ways to mitigate radon levels in your home. At 2-4 pCi/L, radon is a mid-level threat to your health and is one you shouldn’t ignore. 

Tests from Radon.com find that the average radon level in this county is under 2 pCi/l. While this level of radon can be difficult to mitigate and poses a lower health risk than heightened levels of radon, it is still worth testing your own home’s air for radon. There can be homes with high radon levels even in a region with an overall lower radon average. 

Is Radon a Problem in Navajo County?

Radon is a problem in Navajo County, Arizona according to its average radon level. Radon levels between 2 and 4 pCi/L are known to cause lung cancer. If you live in a region with this average level of radon, you should test your home’s air immediately. If your results come back and are above 2 pCi/L, you should invest in a radon mitigation system to protect your health. 

The EPA labeled it as a “Zone Two” County. This means that they found radon levels to be between 2 and 4 pCi/L. At these levels, it’s advisable to seek ways to mitigate radon levels in your home. At 2-4 pCi/L, radon is a mid-level threat to your health and is one you shouldn’t ignore. 

Tests from Radon.com find that the average radon level in this county is under 2 pCi/l. While this level of radon can be difficult to mitigate and poses a lower health risk than heightened levels of radon, it is still worth testing your own home’s air for radon. There can be homes with high radon levels even in a region with an overall lower radon average. 

Is Radon a Problem in Pima County?

Radon is a problem in Pima County, Arizona according to its average radon level. Radon levels between 2 and 4 pCi/L are known to cause lung cancer. If you live in a region with this average level of radon, you should test your home’s air immediately. If your results come back and are above 2 pCi/L, you should invest in a radon mitigation system to protect your health. 

The EPA labeled it as a “Zone Two” County. This means that they found radon levels to be between 2 and 4 pCi/L. At these levels, it’s advisable to seek ways to mitigate radon levels in your home. At 2-4 pCi/L, radon is a mid-level threat to your health and is one you shouldn’t ignore. 

Tests from Radon.com find that the average radon level in this county is under 2 pCi/l. While this level of radon can be difficult to mitigate and poses a lower health risk than heightened levels of radon, it is still worth testing your own home’s air for radon. There can be homes with high radon levels even in a region with an overall lower radon average. 

Is Radon a Problem in Pinal County?

Radon is a problem in Pinal County, Arizona according to its average radon level. Radon levels between 2 and 4 pCi/L are known to cause lung cancer. If you live in a region with this average level of radon, you should test your home’s air immediately. If your results come back and are above 2 pCi/L, you should invest in a radon mitigation system to protect your health. 

The EPA labeled it as a “Zone Two” County. This means that they found radon levels to be between 2 and 4 pCi/L. At these levels, it’s advisable to seek ways to mitigate radon levels in your home. At 2-4 pCi/L, radon is a mid-level threat to your health and is one you shouldn’t ignore. 

Tests from Radon.com find that the average radon level in this county is under 2 pCi/l. While this level of radon can be difficult to mitigate and poses a lower health risk than heightened levels of radon, it is still worth testing your own home’s air for radon. There can be homes with high radon levels even in a region with an overall lower radon average. 

Is Radon a Problem in Santa Cruz County?

Radon is a problem in Santa Cruz County, Arizona according to its average radon level. Radon levels between 2 and 4 pCi/L are known to cause lung cancer. If you live in a region with this average level of radon, you should test your home’s air immediately. If your results come back and are above 2 pCi/L, you should invest in a radon mitigation system to protect your health. 

The EPA labeled it as a “Zone Two” County. This means that they found radon levels to be between 2 and 4 pCi/L. At these levels, it’s advisable to seek ways to mitigate radon levels in your home. At 2-4 pCi/L, radon is a mid-level threat to your health and is one you shouldn’t ignore. 

Tests from Radon.com find that the average radon level in this county is under 2 pCi/l. While this level of radon can be difficult to mitigate and poses a lower health risk than heightened levels of radon, it is still worth testing your own home’s air for radon. There can be homes with high radon levels even in a region with an overall lower radon average. 

Is Radon a Problem in Yavapai County?

Radon is a problem in Yavapai County, Arizona according to its average radon level. Radon levels between 2 and 4 pCi/L are known to cause lung cancer. If you live in a region with this average level of radon, you should test your home’s air immediately. If your results come back and are above 2 pCi/L, you should invest in a radon mitigation system to protect your health. 

The EPA labeled it as a “Zone Two” County. This means that they found radon levels to be between 2 and 4 pCi/L. At these levels, it’s advisable to seek ways to mitigate radon levels in your home. At 2-4 pCi/L, radon is a mid-level threat to your health and is one you shouldn’t ignore. 

Tests from Radon.com find the average radon level is between 2 and 4 pCi/L. Radon levels between 2 and 4 pCi/L are known to cause cancer and can be lessened with a radon mitigation system. If you live in a region with this average radon level, then you should test for radon in your home. If your radon level is above 2, then a radon mitigation system can help you protect your health. 

Is Radon a Problem in Yuma County?

Radon is a problem in Yuma County, Arizona according to its average radon level. Radon levels between 2 and 4 pCi/L are known to cause lung cancer. If you live in a region with this average level of radon, you should test your home’s air immediately. If your results come back and are above 2 pCi/L, you should invest in a radon mitigation system to protect your health. 

The EPA labeled it as a “Zone Two” County. This means that they found radon levels to be between 2 and 4 pCi/L. At these levels, it’s advisable to seek ways to mitigate radon levels in your home. At 2-4 pCi/L, radon is a mid-level threat to your health and is one you shouldn’t ignore. 

Tests from Radon.com find that the average radon level in this county is under 2 pCi/l. While this level of radon can be difficult to mitigate and poses a lower health risk than heightened levels of radon, it is still worth testing your own home’s air for radon. There can be homes with high radon levels even in a region with an overall lower radon average. 

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Jonathon Silva

Jonathan Silva is our longtime Air Purifier Essentials author. He has been writing on air purification technologies for his entire professional career.

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