Mississippi has 82 counties, with 0 classified as EPA Zone 1 (highest risk). With an average radon level of 9 pCi/L, Mississippi state testing data reveals significantly elevated risks across multiple counties. Testing is highly recommended.
Mississippi is the 32nd most expansive state in terms of size and the 31st most populous in the entire US.
Mississippi does have an active radon program, dedicated to educating citizens about the risks associated with the deadly gas. You can find more information on Radon, testing and mitigation at the official page.
Explore radon data organized by metro region, including average levels, hotspot cities, and local mitigation professionals.
All 82 Mississippi counties with their EPA radon zone classification and user-submitted average radon levels.
Browse radon data for individual cities across Mississippi. Each city page includes user-submitted radon levels, local contractors, and mitigation resources.