Radon levels in West Virginia: Moderate
The model predicts a population-weighted basement average of 2.4 pCi/L (model estimate) 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
Test West Virginia - the EPA says "consider fixing" in this range
The predicted basement average here is 2.4 pCi/L, in the 2-4 pCi/L band where the EPA recommends considering mitigation. Plenty of individual homes in a moderate area test above 4. Start with a short-term test; if it comes back at 2 or higher, follow up with a long-term test or a continuous monitor.
Monitor link goes to the Airthings store - use code RADONGRADE-10OFF at checkout for 10% off any Airthings monitor.
Already tested at 4 pCi/L or higher? Find a certified mitigation professional (EPA). A mitigation system typically runs $800-$2,500 installed.
Affiliate links: we may earn a commission from Airthings or Amazon at no extra cost to you.
What the data says about radon in West Virginia
On the EPA's 1993 radon zone map, 20 of West Virginia's 55 counties are EPA Zone 1 (36%), 29 are Zone 2 and 6 are Zone 3. Zone 2 (predicted screening average of 2-4 pCi/L) is the most common designation, with the 20 Zone 1 counties marking where the EPA expected the highest potential. That classification has not been revised since 1993; it describes counties, not homes, and elevated readings turn up in Zone 3 counties every year.
West Virginia models out at 2.4 pCi/L predicted basement average (moderate; 1.3× the US population-weighted average of 1.8). Of the 55 counties with predictions, 0 are predicted at or above 4 pCi/L, 49 in the 2-4 band and 6 below 2. The highest predicted county is Morgan County at 3.7 pCi/L; the lowest is Logan County at 1.9 - a 1.8 pCi/L spread that means a statewide average tells you little about any one county.
At ZIP-code resolution, 0.2% of West Virginia ZIPs are predicted at 4 pCi/L or higher in the basement and 69.9% at 2 or higher - below the national 4.2% at the action level but above the national 48.7% at 2 pCi/L. With more than half of ZIPs above 2, a test is worth doing before any purchase or renovation here.
West Virginia counties by predicted radon
Sorted highest to lowest predicted basement average (model estimate). 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 |
Radon levels in West Virginia cities
The 2 most-populous West Virginia places among the 1,000 largest US cities (Census incorporated places and CDPs), by population. City figures are ZIP-land-weighted means of the model's ZIP predictions (model estimate).
| City | Population | Predicted basement | Upstairs | Grade | ZIPs ≥ 4 |
|---|---|---|---|---|---|
| Charleston | 46,838 | 1.9 pCi/L | 1.3 | Low | 0% |
| Huntington | 45,325 | 1.9 pCi/L | 1.3 | Low | 0% |
Highest-radon ZIP codes in West Virginia
The 10 West Virginia ZIP codes with the highest predicted basement average (model estimate), out of 561 modeled. A ZIP average is still an area figure - neighboring homes routinely test several pCi/L apart.
| ZIP | County | Predicted basement | Upstairs | Grade |
|---|---|---|---|---|
| 24901 | Greenbrier County | 4.1 pCi/L | 2.5 | High |
| 25430 | Jefferson County | 4.0 pCi/L | 2.1 | Moderate |
| 25411 | Morgan County | 3.8 pCi/L | 2.4 | Moderate |
| 25427 | Berkeley County | 3.8 pCi/L | 2.1 | Moderate |
| 25405 | Berkeley County | 3.8 pCi/L | 1.6 | Moderate |
| 25404 | Berkeley County | 3.8 pCi/L | 2.3 | Moderate |
| 25419 | Berkeley County | 3.7 pCi/L | 2.2 | Moderate |
| 26070 | Brooke County | 3.6 pCi/L | 2.0 | Moderate |
| 25403 | Berkeley County | 3.5 pCi/L | 2.6 | Moderate |
| 26035 | Brooke County | 3.4 pCi/L | 2.0 | Moderate |
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 area figures; 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
State programs keep lists of certified testers and mitigators and sometimes run kit programs. We link only pages we could verify, and West Virginia's program page did not respond when we checked, so start from the EPA state radon contacts page. Then read how to test and what mitigation costs.