Counties with the Highest Radon Potential in West Virginia
The top 25 of 55 West Virginia 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 | Boone County | 3 |
| 2 | Kanawha County | 3 |
| 3 | Logan County | 3 |
| 4 | McDowell County | 3 |
| 5 | Mingo County | 3 |
| 6 | Wyoming County | 3 |
| 7 | Barbour County | 2 |
| 8 | Braxton County | 2 |
| 9 | Cabell County | 2 |
| 10 | Calhoun County | 2 |
| 11 | Clay County | 2 |
| 12 | Doddridge County | 2 |
| 13 | Fayette County | 2 |
| 14 | Gilmer County | 2 |
| 15 | Harrison County | 2 |
| 16 | Jackson County | 2 |
| 17 | Lewis County | 2 |
| 18 | Lincoln County | 2 |
| 19 | Marion County | 2 |
| 20 | Mason County | 2 |
| 21 | Nicholas County | 2 |
| 22 | Pleasants County | 2 |
| 23 | Putnam County | 2 |
| 24 | Raleigh County | 2 |
| 25 | Randolph County | 2 |
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 West Virginia”, https://gismap.land/rankings/west-virginia/highest-radon-counties. Figures from EPA Map of Radon Zones (September 2025).
More West Virginia rankings
Richest citiesMost expensive homesMost affordable homesHighest rentMost educatedHighest poverty rateMost densely populatedLargest by populationYoungestOldest by median ageFastest-growingFastest-shrinkingFastest-growing since 2010WarmestColdestSnowiestWettestDriestHighest hazard risk countiesLowest hazard risk countiesHighest expected lossesWorst air qualityCleanest airWorst drought