U.S. EPA Radon Zones

Below is an EPA generated map that provides a general representation of how radon levels fluctuate across the country. As stated in the disclaimer below, high levels are found in all zones. Testing is the only way to know if your home has a radon problem. Click here to access an interactive version of the map below.

United States Radon Zone Map
Source: epa.gov (3/23/2018)

EPA DISCLAIMER: The purpose of this map is to assist national, state and local organizations to target their resources and to implement radon-resistant building codes. This map is not intended to be used to determine if a home in a given zone should be tested for radon. Homes with elevated levels of radon have been found in all three zones. All homes should be tested regardless of geographic location. EPA recommends that this map be supplemented with any available local data in order to further understand and predict the radon potential for a specific area.


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