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West Virginia Radon Map and Levels by County

West Virginia's counties span all three EPA radon zones. Homes with elevated levels occur in all three zones, so only a test measures yours.

Data checked By Radon411Methodology

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  • Share at 4+ pCi/L

    37.5%

    1.8 pts above U.S.

    West Virginia
    37.5%
    U.S.
    35.7%

    10,061 tests across 55 counties, 2008 to 2017

  • Rank among states

    18 of 47

    Middle of the states

    West Virginia
    37.5%
    North Dakota
    59.3%

    By share, every state pooled the same way, 2008 to 2017

  • Counties in EPA Zone 1

    20 of 55

    Some at highest potential

    Zone 1
    20
    Zone 2
    29

    Most counties sit in Zone 2; Zone 1 is the highest potential

  • Highest county

    58.1%

    Morgan County

    Morgan
    58.1%
    Grant
    9.8%

    Counties with 30+ tests, 2008 to 2017

Read a result for West Virginia

Starts at EPA's action level

4.0pCi/L

EPA’s own thresholds; the figures are the area’s, never this home’s.

EPA’s reading of 4.0 pCi/L

At or above 4 pCi/L

  1. Under 20 to 1.9 pCi/L
  2. 2 to 4consider a fix
  3. 4 and aboveEPA says fix it

This result is at or above 4 pCi/L. EPA recommends fixing a home when the radon level is 4 pCi/L or higher. 37.5% of West Virginia's reported tests reached 4 pCi/L, 2008 to 2017.

Interpret this readingWhat a fix costs

The data

West Virginia, At a glance

West Virginia at a glance

Predicted: EPA radon zone

55 of 55 counties classified

EPA classifies counties, not states. Of the 55 counties in West Virginia with a zone, 20 are in Zone 1, 29 in Zone 2 and 6 in Zone 3.

  • Zone 1: Highest predicted potentialgreater than 4 pCi/L20 of 55 counties · 36.4%
  • Zone 2: Moderate predicted potential2 to 4 pCi/L29 of 55 counties · 52.7%
  • Zone 3: Lower predicted potentialless than 2 pCi/L6 of 55 counties · 10.9%

An EPA radon zone predicts a whole county. It is not intended to determine whether any individual home should be tested: homes with elevated levels occur in all three zones, and EPA recommends testing every home regardless of zone.

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

CDC test figures, county by county

CDC publishes West Virginia's radon test figures by county: 55 of its 55 counties have one. Each one's share is in the county list.

How to read these figures

West Virginia, Compared

West Virginia radon figures, compared

Calculated by Radon411
West Virginia, 2008 to 2017, laboratory
37.5%
of 10,061 tests at or above 4 pCi/L, pooled
Against the U.S.
+1.8points
35.7% pooled
Rank among the states
18 of 47
1 is the highest share
Counties with 30 or more tests
27
Highest
58.1%
Morgan County
Lowest
9.8%
Grant County

West Virginia pools to 37.5%: that share of 10,061 reported tests from 55 counties over the 2008 to 2017 laboratory totals reached EPA's action level. Nationally the pooled share is 35.7%: 1.8 points lower than here.

Among 47 states pooled the same way it ranks 18th, with Maine (37.6%) above it and New Hampshire (35.0%) below. Morgan County reports the highest share (58.1% of 241 tests) and Grant County the lowest (9.8%); the most tests came from Berkeley County, 2,888 of them at 50.7%.

Across its 4 overlapping ten-year totals, the share went from 37.3% (2005 to 2014) to 37.5% (2008 to 2017), within 2 points, with 2006 to 2015 the highest at 37.7%. By band, 4 counties at 50% or more, 12 counties at 30% to 50%, 10 counties at 15% to 30%, 1 county at 5% to 15%.

EPA's 1993 map puts 20 of its 55 classified counties in Zone 1; against that, 37.5% of the tests reported since reached 4 pCi/L.

West Virginia ranked among 47 states by pooled share of tests at or above 4 pCi/L, 2008 to 2017, laboratory
StateRankCountiesTestsAt or above 4 pCi/L
Utah13 of 472828,34241.9%
Pennsylvania14 of 4767203,04541.7%
Idaho15 of 474412,96141.5%
Indiana16 of 479243,14838.9%
Maine17 of 471611,82537.6%
West Virginia18 of 475510,06137.5%
New Hampshire19 of 471015,60835.0%
Tennessee20 of 479531,06633.3%
Missouri21 of 4711558,52530.6%
Virginia22 of 4713153,19930.4%
New Mexico23 of 47293,72128.5%
West Virginia's highest and lowest counties with 30 or more tests, by share at or above 4 pCi/L, 2008 to 2017, laboratory
CountyRankTestsAt or above 4 pCi/L
Morgan County1 of 2724158.1%
Jefferson County2 of 2789853.2%
Greenbrier County3 of 2717652.3%
Berkeley County4 of 272,88850.7%
Hancock County5 of 2732649.1%
Brooke County6 of 2715743.9%
Mineral County7 of 2710742.1%
Ohio County8 of 2785340.3%
Hampshire County9 of 279038.9%
Preston County10 of 2717636.9%
Grant County27 of 271649.8%
Wood County26 of 2790515.9%
Cabell County25 of 2714516.6%
Raleigh County24 of 274216.7%
Monongalia County23 of 271,17619.0%
West Virginia's counties with 30 or more tests, by their own share at or above 4 pCi/L, 2008 to 2017, laboratory
ShareCountiesTheir testsFor example
50% or more44,203Morgan County, Jefferson County, Greenbrier County
30% to 50%122,393Hancock County, Brooke County, Mineral County
15% to 30%102,931Marion County, Taylor County, Putnam County
5% to 15%1164Grant County
Under 5%00None
West Virginia ten-year laboratory totals, pooled, against the United States
PeriodCountiesTestsAt or above 4 pCi/LUnited StatesChange from the row before
2008 to 20175510,06137.5%35.7%+0.2 points
2007 to 2016559,76337.3%35.8%−0.4 points
2006 to 2015559,36637.7%36.3%+0.4 points
2005 to 2014558,95237.3%36.0%First on file

Pooled shares: Radon411's sum of CDC's county counts for one period. CDC publishes no state or national figure.

West Virginia, Counties

West Virginia counties by EPA zone

Predicted

All 55 counties, grouped by the zone EPA predicts and ordered by their reported share at or above 4 pCi/L, under West Virginia's map. Each county has a page of its own.

West Virginia radon map by county: EPA radon zones. Map of West Virginia's 55 counties shaded by EPA radon zone: Zone 1 in red-orange, Zone 2 in amber, Zone 3 in pale sand. 20 in Zone 1, 29 in Zone 2, 6 in Zone 3.
West Virginia radon map by countyEPA radon zones for West Virginia's counties: 20 counties in Zone 1, 29 counties in Zone 2, 6 counties in Zone 3.A prediction for each county, not a reading of any home; elevated homes occur in all three zones.

The 12 highest in West Virginia, 2008 to 2017

Zone 1: highest predicted potential20

Local help

West Virginia, Local resources

Local resources in West Virginia

Who to ask in West Virginia: its radon program, test kits and professionals.

What West Virginia's program says
Phone
304-352-5039
Email
Radon@wv.gov
Licensing of radon professionals
Complete listings of professionals licensed to perform Asbestos, Lead, Radon and Clandestine Drug Laboratory Remediation activities in West Virginia.

What it means

West Virginia, Questions

Questions about radon in West Virginia

Is radon a problem in West Virginia?

Of the 55 counties in West Virginia that EPA's Map of Radon Zones classifies, 20 carry Zone 1 (the highest predicted potential), 29 Zone 2 and 6 Zone 3. Pooled from 55 counties, 37.5% of the 10,061 radon tests reported to CDC over the 2008 to 2017 laboratory totals were at or above 4 pCi/L, 18th of 47 states.

Who does radon mitigation in West Virginia?

35 radon businesses are listed for West Virginia, for testing, mitigation or both; each listing names the licensing list it was read from.

Which West Virginia counties are in EPA radon Zone 1?

Zone 1 holds 20 counties in West Virginia; the first 8 by name are Berkeley County, Brooke County, Grant County, Greenbrier County, Hampshire County, Hancock County, Hardy County, Jefferson County, the rest in the county table on this page.

Which West Virginia counties have the highest radon?

Morgan County 58.1% (241 tests) leads West Virginia by the share of reported tests at or above 4 pCi/L, 2008 to 2017, laboratory, then Jefferson County 53.2% (898 tests), Greenbrier County 52.3% (176 tests), Berkeley County 50.7% (2,888 tests), Hancock County 49.1% (326 tests).

Which EPA region is West Virginia in?

West Virginia is in EPA Region 3: Mid-Atlantic.

Products

West Virginia, Products

Testing a home in West Virginia

37.5% of the 10,061 tests reported to CDC for West Virginia over the 2008 to 2017 laboratory totals reached 4 pCi/L: a short-term kit (2 to 90 days) gives a first answer in days, a long-term test the year-round average. A short-term kit (2 to 90 days) is the quick first check for a home in West Virginia; a long-term test tells the year-round average.

Test kits and monitors3

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Best radon monitors for West Virginia homes, compared

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