Radon Map

Radon Map

Are there parts of the country where radon levels are higher or lower than average?
Radon levels definitely vary based on geographic location, as shown in the EPA map below. However, it's important to test for radon even if you live in a moderate or low-risk area. Research has shown that radon levels can vary significantly between neighboring houses.



Source: EPA

Zone 1 counties (red) have a predicted average indoor radon screening level greater than 4 pCi/L; highest potential
Zone 2 counties (orange) have a predicted average indoor radon screening level between 2 and 4 pCi/L; moderate potential
Zone 3 counties (yellow)  have a predicted average indoor radon screening level less than 2 pCi/L; low potentiall

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