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What do the colors mean?*                               epa map of radon zones ga

Radon Level Zone 1 Zone 1 counties have a predicted average indoor radon screening level greater than 4 pCi/L (picocuries per liter) (red zones) Highest Potential
Radon Level Zone 2 Zone 2 counties have a predicted average indoor radon screening level between 2 and 4 pCi/L (orange zones) Moderate Potential
Radon Level Zone 3 Zone 3 counties have a predicted average indoor radon screening level less than 2 pCi/L (yellow zones)

Low Potential