Radon levels in West Virginia: Moderate
The model predicts a population-weighted basement average of 2.4 pCi/L across West Virginia's 55 counties - about 1.3× the US average of 1.8 pCi/L. Above-ground floors average 1.4 pCi/L.
Predicted (model estimate). The pCi/L figures on this page are long-term area averages from a peer-reviewed national model built on millions of real radon tests (2001-2021). They describe the typical home in this area - not your home, which can be several times higher or lower. The EPA radon zone is a separate, 1993 county-level classification. How the numbers work.
20 / 55
EPA Zone 1 counties (36%)
29 / 6
Zone 2 / Zone 3 counties
0
counties predicted ≥ 4 pCi/L
0.2%
of ZIP codes predicted ≥ 4 pCi/L
West Virginia counties by predicted radon
Sorted highest to lowest predicted basement average. 55 counties.
| County | Predicted basement | Upstairs | Grade | EPA zone | ZIPs |
|---|---|---|---|---|---|
| Morgan County | 3.7 pCi/L | 2.2 | Moderate | EPA Zone 1 | 2 |
| Berkeley County | 3.5 pCi/L | 2.1 | Moderate | EPA Zone 1 | 9 |
| Brooke County | 3.2 pCi/L | 1.9 | Moderate | EPA Zone 1 | 5 |
| Jefferson County | 3.1 pCi/L | 2.0 | Moderate | EPA Zone 1 | 7 |
| Greenbrier County | 2.9 pCi/L | 1.6 | Moderate | EPA Zone 1 | 16 |
| Hampshire County | 2.9 pCi/L | 1.4 | Moderate | EPA Zone 1 | 16 |
| Hancock County | 2.9 pCi/L | 1.8 | Moderate | EPA Zone 1 | 4 |
| Mineral County | 2.8 pCi/L | 1.4 | Moderate | EPA Zone 1 | 8 |
| Hardy County | 2.8 pCi/L | 1.3 | Moderate | EPA Zone 1 | 7 |
| Monroe County | 2.8 pCi/L | 1.4 | Moderate | EPA Zone 1 | 9 |
| Pendleton County | 2.7 pCi/L | 1.1 | Moderate | EPA Zone 1 | 7 |
| Pocahontas County | 2.6 pCi/L | 1.2 | Moderate | EPA Zone 1 | 9 |
| Ohio County | 2.6 pCi/L | 1.8 | Moderate | EPA Zone 1 | 3 |
| Mercer County | 2.5 pCi/L | 1.3 | Moderate | EPA Zone 1 | 12 |
| Summers County | 2.4 pCi/L | 1.3 | Moderate | EPA Zone 1 | 9 |
| Marshall County | 2.4 pCi/L | 1.4 | Moderate | EPA Zone 1 | 8 |
| Nicholas County | 2.4 pCi/L | 1.3 | Moderate | EPA Zone 2 | 14 |
| Raleigh County | 2.4 pCi/L | 1.3 | Moderate | EPA Zone 2 | 30 |
| Upshur County | 2.4 pCi/L | 1.4 | Moderate | EPA Zone 2 | 5 |
| Preston County | 2.3 pCi/L | 1.3 | Moderate | EPA Zone 1 | 12 |
| Randolph County | 2.3 pCi/L | 1.3 | Moderate | EPA Zone 2 | 20 |
| Tucker County | 2.3 pCi/L | 1.2 | Moderate | EPA Zone 2 | 5 |
| Barbour County | 2.3 pCi/L | 1.3 | Moderate | EPA Zone 2 | 4 |
| Taylor County | 2.3 pCi/L | 1.3 | Moderate | EPA Zone 2 | 3 |
| Webster County | 2.3 pCi/L | 1.2 | Moderate | EPA Zone 2 | 8 |
| Doddridge County | 2.3 pCi/L | 1.4 | Moderate | EPA Zone 2 | 4 |
| Lewis County | 2.3 pCi/L | 1.3 | Moderate | EPA Zone 2 | 8 |
| Roane County | 2.3 pCi/L | 1.4 | Moderate | EPA Zone 2 | 8 |
| Tyler County | 2.3 pCi/L | 1.4 | Moderate | EPA Zone 2 | 4 |
| Wetzel County | 2.3 pCi/L | 1.3 | Moderate | EPA Zone 1 | 10 |
| Marion County | 2.2 pCi/L | 1.4 | Moderate | EPA Zone 2 | 8 |
| Fayette County | 2.2 pCi/L | 1.2 | Moderate | EPA Zone 2 | 24 |
| Pleasants County | 2.2 pCi/L | 1.4 | Moderate | EPA Zone 2 | 2 |
| Braxton County | 2.2 pCi/L | 1.2 | Moderate | EPA Zone 2 | 13 |
| Jackson County | 2.2 pCi/L | 1.3 | Moderate | EPA Zone 2 | 10 |
| Gilmer County | 2.2 pCi/L | 1.3 | Moderate | EPA Zone 2 | 9 |
| Ritchie County | 2.2 pCi/L | 1.3 | Moderate | EPA Zone 2 | 10 |
| Lincoln County | 2.2 pCi/L | 1.2 | Moderate | EPA Zone 2 | 13 |
| Wirt County | 2.2 pCi/L | 1.4 | Moderate | EPA Zone 2 | 2 |
| Wayne County | 2.1 pCi/L | 1.2 | Moderate | EPA Zone 2 | 12 |
| Clay County | 2.1 pCi/L | 1.2 | Moderate | EPA Zone 2 | 11 |
| Harrison County | 2.1 pCi/L | 1.4 | Moderate | EPA Zone 2 | 10 |
| Putnam County | 2.1 pCi/L | 1.4 | Moderate | EPA Zone 2 | 8 |
| Mason County | 2.1 pCi/L | 1.3 | Moderate | EPA Zone 2 | 11 |
| Calhoun County | 2.1 pCi/L | 1.2 | Moderate | EPA Zone 2 | 10 |
| Kanawha County | 2.1 pCi/L | 1.3 | Moderate | EPA Zone 3 | 30 |
| Grant County | 2.1 pCi/L | 1.0 | Moderate | EPA Zone 1 | 6 |
| Wyoming County | 2.0 pCi/L | 1.0 | Moderate | EPA Zone 3 | 22 |
| Cabell County | 2.0 pCi/L | 1.3 | Moderate | EPA Zone 2 | 11 |
| Mingo County | 2.0 pCi/L | 1.0 | Low | EPA Zone 3 | 10 |
| McDowell County | 2.0 pCi/L | 1.0 | Low | EPA Zone 3 | 9 |
| Boone County | 1.9 pCi/L | 1.0 | Low | EPA Zone 3 | 24 |
| Wood County | 1.9 pCi/L | 1.3 | Low | EPA Zone 2 | 11 |
| Logan County | 1.9 pCi/L | 1.0 | Low | EPA Zone 3 | 11 |
| Monongalia County | 1.9 pCi/L | 1.3 | Low | EPA Zone 1 | 8 |
West Virginia radon questions
- Is radon high in West Virginia?
- West Virginia's population-weighted predicted basement average is 2.4 pCi/L, about 1.3× the US average of 1.8. 0 of its 55 modeled counties are predicted at or above the EPA action level of 4 pCi/L, 49 are in the 2-4 "consider fixing" range and 6 are below 2. 0.2% of West Virginia ZIP codes are predicted at 4 or higher.
- Which West Virginia county has the highest radon?
- Morgan County has the highest predicted basement average in West Virginia at 3.7 pCi/L (EPA Zone 1). The lowest is Logan County at 1.9 pCi/L. These are modeled area averages; individual homes in any county can test far higher.
- How many EPA Zone 1 counties are in West Virginia?
- 20 of West Virginia's 55 counties (36%) are EPA Zone 1 (highest potential), 29 are Zone 2 and 6 are Zone 3. The EPA zone map dates from 1993; the predicted values on this page come from a 2001-2021 model built on millions of actual tests, so the two can disagree for a given county.
- Should I test for radon in West Virginia?
- Yes - with some urgency. West Virginia's predicted average is in the moderate range, and 69.9% of its ZIP codes are predicted at 2 pCi/L or higher. A short-term charcoal kit or a continuous digital monitor will tell you your actual level within days.
West Virginia radon program
Many states offer free or discounted test kits and keep lists of certified mitigators. Find the West Virginia radon office through the EPA state radon contacts page. Then read how to test and what mitigation costs.