Radon Risk in Mississippi
EPA zone data and CDC radon averages for all 82 counties in Mississippi.
Tipper on radon in Mississippi
The CDC doesn't have enough statewide testing data to calculate a reliable average for Mississippi. That doesn't mean radon isn't a concern here. It means individual county data, where available, is your best guide. Use the county list below to find the most specific data for where you live.
Looking at the zone breakdown: none of Mississippi's counties are in the high-risk Zone 1 category, 8 are Zone 2 (moderate), and 74 are Zone 3 (low). Use the county list below to find your area and see the most specific data available.
Tipper's recommendation for Mississippi residents: if you haven't tested your home, start there. A short-term test kit costs around $15 and gives you a result in 48 hours. If your home tests at or above 4 pCi/L, a professional mitigation system (typically $800–$2,000 depending on your foundation and home size) will reliably bring levels down.
Sources: EPA Radon Zone Map
Why Mississippi's Geology Matters
Mississippi has very low radon risk. The state is almost entirely underlain by young, unconsolidated Gulf Coastal Plain sediments — clays, sands, and silts with minimal uranium content. The high water table in many areas further limits radon migration from soil into buildings.
Radon Disclosure Laws
Mississippi does not have a radon-specific disclosure requirement for residential real estate transactions.
All Counties in Mississippi
Click any county to see its full radon data and local contractors.
Showing 82 of 82 counties in Mississippi. Zone classifications from the EPA. Average pCi/L from CDC tracking data.
Not sure where to start?
A short-term test kit tells you your home's actual radon level in 48 hours. Tipper has picked the best options at every price point. All EPA-approved, all lab-fee included.
Contractors
Find certified radon pros in Mississippi →