What levels are too high?
Radon is measured in pico-Curies per liter (pCi/L) of air. A picoCurie is a measure of the amount of radioactivity of a particular substance. The level of Radon in outdoor air is about 0.4 pCi/L. The average indoor Radon level is about 1.3 pCi/L. The EPA has established 4.0 pCi/L as the action level for Radon in homes, schools and workplaces. Current mitigation technology can generally reduce Radon levels to 2.0 pCi/L or less. Since Radon is a carcinogen, no level is completely risk-free. However, since it is a natural part of the environment there is no such thing as a “0” level.
Radon is measured in picoCuries per liter (pCi/L) of air. A picoCurie is a measure of the amount of radioactivity of a particular substance. A liter is about equal to a quart. The level of radon in outdoor air is about 0.4 pCi/L. The average indoor radon level is about 1.3 pCi/L. EPA has established 4.0 pCi/L as the action level for radon in homes, schools and workplaces. This is a technology-based number, not a health-based level. Current mitigation technology can generally reduce radon levels to 3.9 pCi/L or less. Since radon is a carcinogen, no level is completely risk-free. However, since it is a natural part of the environment there is no such thing as a “0” level.
