North Carolina Radon Map

The purpose of this radon map is to assist the National, State, and local organizations. These organizations use the information to target their resources and to implement radon-resistant building codes. Remember that this map is not intended to be used to determine if a home in a given zone should be tested for radon, although homes with elevated levels of radon are often found in all three zones. The EPA recommends that all homes should be tested regardless of geographic location.

EPA Radon Recomendations

Test your home for radon as it’s very easy and inexpensive.

Mitigate your home if the radon level is 4 picocuries per liter (pCi/L) or higher.

Radon levels that are less than 4 pCi/L can still pose a risk, and in many cases may be reduced by a radon reduction system.

Radon is estimated to cause thousands of cancer deaths in the U.S. each year.

map of North Carolina showing the three levels of radon for each county
button that says request a radon test now

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What do the Radon Zone Colors Mean?

Zone 1 counties have a predicted average indoor radon screening level greater than 4 pCi/L (picocuries per liter). Highest Potential

Zone 2 counties have a predicted average indoor radon screening level between 2 and 4 pCi/L. Moderate Potential

Zone 3 counties have a predicted average indoor radon screening level less than 2 pCi/L. Low Potential

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