Counties with the Highest Radon Potential in Mississippi
The top 25 of 82 Mississippi counties on GIS Map, ranked by EPA radon zone, where zone 1 carries the highest predicted indoor radon potential and zone 3 the lowest.
| # | County | EPA radon zone |
|---|---|---|
| 1 | Adams County | 3 |
| 2 | Amite County | 3 |
| 3 | Attala County | 3 |
| 4 | Benton County | 3 |
| 5 | Bolivar County | 3 |
| 6 | Calhoun County | 3 |
| 7 | Carroll County | 3 |
| 8 | Choctaw County | 3 |
| 9 | Claiborne County | 3 |
| 10 | Clarke County | 3 |
| 11 | Coahoma County | 3 |
| 12 | Copiah County | 3 |
| 13 | Covington County | 3 |
| 14 | DeSoto County | 3 |
| 15 | Forrest County | 3 |
| 16 | Franklin County | 3 |
| 17 | George County | 3 |
| 18 | Greene County | 3 |
| 19 | Grenada County | 3 |
| 20 | Hancock County | 3 |
| 21 | Harrison County | 3 |
| 22 | Hinds County | 3 |
| 23 | Holmes County | 3 |
| 24 | Humphreys County | 3 |
| 25 | Issaquena County | 3 |
Source: EPA Map of Radon Zones (September 2025). All counties with data are ranked. Estimates carry margins of error.
Citing this page: GIS Map, “Counties with the Highest Radon Potential in Mississippi”, https://gismap.land/rankings/mississippi/highest-radon-counties. Figures from EPA Map of Radon Zones (September 2025).
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