The map below shows radon levels measured in homes by ZIP code in Maryland from 2005-2016. The U.S. Environmental Protection Agency (EPA) recommends testing all homes for radon, and fixing homes if their levels are higher than 4 picocuries per liter (pCi/L).
Click the below map to access an interactive map of Maryland Radon data
EPA - Radon test kits, radon measurement and mitigation professionals
EPA Resources for Home Buyers and Sellers
201 W. Preston Street, Baltimore, MD 21201-2399
(410) 767-6500 or 1-877-463-3464