Radon is the number one cause of lung cancer in non-smokers.  For children, radon and second-hand smoke are the biggest risks for developing lung cancer later in life.  Unless you test with a radon test kit, you can't tell whether your home has radon, because radon is a gas that has no smell, no color, and can't be seen. 

Radon in Maryland

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​


Should You Care about Radon?

If you don't know your home's radon level, you should think about getting a radon test.  Starting in 2017, the Department of the Environment and the Department of Health and Mental Hygiene will be working with local health departments to provide information about radon testing, and low- or no-cost test kits, to the public. 

EPA - Radon test kits, radon measurement and mitigation professionals

EPA Resources for Home Buyers and Sellers

EPA -- Radon resources for builders and contractors - radon-resistant new construction

Mid-Atlantic States EPA Radon Information



Radon Resources

Maryland Department of the Environment

U.S. Environmental Protection Agency

Department of Housing and Community Development