US Radon Gas Map
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Zone 1 counties have a predicted average
indoor radon screening level greater than 4 pCi/L (pico curies per liter) (red zones) |
Highest Potential |
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Zone 2 counties have a predicted average
indoor radon screening level between 2 and 4 pCi/L (orange zones) |
Moderate Potential |
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Zone 3 counties have a predicted average
indoor radon screening level less than 2 pCi/L (yellow zones) |
Low Potential |
View Radon Gas Zones per State
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