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Did You Know? A radon level of 4.0 pCi L, the EPA action level, carries a serious long term health risk. Exposure at that level is comparable to smoking several cigarettes per day! Radon Levels: What is Safe? Professional House Doctors, Inc. What Level of Radon is Safe? American Radon Mitigation The Top 8 Things You Need To Know About Radon Protect Environmental
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