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What is the new MEG?

April 26, 2017Meg

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What is the new MEG?

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The new MEG for radon is 4,000 pCi/L. An MEG at this level represents approximately a 3 per 1,000 cancer risk. While this risk is far greater than typically considered acceptable for an MEG, it represents a contribution of only 20% to the 2 pCi/L indoor air guideline that Maine is now emphasizing for control of radon from soil gas. Given the prevalence of indoor air radon levels at and above 2 pCi/L due to soil gas, ME-CDC believes it is difficult to justify control of radon from water when levels are less than 4000 pCi/L; rather, resources should be directed toward reducing soil gas related sources.