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Where does radon come from and what are considered average levels?

April 26, 2017average levels radon

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Where does radon come from and what are considered average levels?

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10 Posted

Radon is found in rock and earth beneath and around the home; well water; building materials. Based on a national residential radon survey com0pleted in 1991, the average indoor radon level is 1.3 picocuries per liter (pCi/L) in the United States. The average outdoor level is about 0.4 pCi/L.. Full basements tend to have higher levels especially with heavier clay type soils.