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Radon Levels in Pendleton County, West Virginia

EPA puts Pendleton County in Zone 1, its highest radon zone, and 30.9% of its 55 reported radon tests (2008 to 2017, laboratory totals) were at or above 4 pCi/L. 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

    30.9%

    6.6 pts below WV

    Pendleton
    30.9%
    WV
    37.5%

    55 tests, 2008 to 2017

  • Median result

    2.5pCi/L

    Below action level

    Pendleton
    2.5 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2008 to 2017

  • Tests reported

    55

    20th of 27 by tests

    Pendleton
    55
    Berkeley
    2,888

    Reported to CDC before any fix, 2008 to 2017

  • EPA radon zone

    Zone 1

    Highest potential

    1. Zone 1
    2. 2
    3. 3

    1 highest, 3 lowest

    EPA predicts over 4 pCi/L indoors

  • Rank in WV

    16 of 27

    Middle half

    Pendleton
    30.9%
    Morgan
    58.1%

    By share, of 27 with 30+ tests

Read a result for Pendleton County

Starts at Pendleton County's median, 2.5 pCi/L

2.5pCi/L

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

EPA’s reading of 2.5 pCi/L

Between 2 and 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 between 2 and 4 pCi/L. EPA recommends considering a fix when the level is between 2 and 4 pCi/L. Pendleton County's median reported result, 2008 to 2017.

Interpret this readingWhat a fix costs

The data

Pendleton County, At a glance

Pendleton County at a glance

Predicted: EPA radon zone

EPA Zone 1: highest predicted potential

EPA puts all of Pendleton County in and predicts an average indoor of greater than 4 pCi/L (greater than 150 Bq/m³) across the county. That is one forecast for the whole county, not a reading of any address in it; homes above EPA's turn up in all three zones.

USGS geologic potential: High across 98% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

Radon tests reported for Pendleton County, 2008 to 2017, laboratory

Reported results by concentration band, Pendleton County, 2008 to 2017, laboratory
Under 2 pCi/L: 45%2 to 4 pCi/L: 24%4 pCi/L and above: 31%

Of 55 pre-mitigation tests reported to CDC, not homes in this area.

Reported results by concentration band, Pendleton County, 2008 to 2017, laboratory: data table
Result bandTests MeasuredShare Measured
Under 2 pCi/L2545.5%
2 to 4 pCi/L1323.6%
4 pCi/L and above1730.9%
What these figures count

These are the 55 tests reported to CDC for Pendleton County over 2008 to 2017 (laboratory totals), many from homes being sold or already suspected of a problem: they describe the county's reported tests, not this house.

Measured: CDC tracking data. Figure above: 2008 to 2017, laboratory. Measured data period: 2005 to 2017 (every CDC figure on file).

How to read these figures

Pendleton County, Compared

Pendleton County radon figures, compared

Calculated by Radon411

In Pendleton County, about 3 in 10 reported tests over the 2008 to 2017 laboratory totals (17 of 55) were at or above EPA's action level. Against the national pool of 35.7%, the gap is 4.8 points lower. Across 55 West Virginia counties pooled together, 37.5% of tests reached that level, so Pendleton County runs 6.6 points below its state.

Of 5 neighbours with a figure, 3 reported a larger share at or above 4 pCi/L and 2 a smaller one; the spread is 9.8% (Grant County) to 50.1% (Augusta County, VA). By share, Pendleton County is 16th of 27 West Virginia counties with 30 or more tests for the same period.

Half the tests came in under 2.5 pCi/L and half over it; the single highest reached 28.0 pCi/L. Below the action level, 25 tests (45.5%) came in under 2 pCi/L, against 37.7% statewide, and 13 tests (23.6%) fell between 2 and 4, against 24.7% statewide.

Zone 1 on EPA's map (predicted average above 4 pCi/L) and a 30.9% share point the same way here. USGS geology rates 98% of the county's land high radon potential.

CDC's ten-year totals for Pendleton County went from 21 tests (2005 to 2014) to 55 (2008 to 2017), the share going from 19.0% to 30.9%.

Pendleton County against West Virginia, the United States and nearby counties, 2008 to 2017, laboratory
AreaTestsAt or above 4 pCi/LMedianDifference from Pendleton County
Pendleton County5530.9%2.5 pCi/LThis county
West Virginia, pooled55 counties, pooled10,06137.5%Not pooled+6.6 points
United States, pooled2,661 counties, pooled2,013,54435.7%Not pooled+4.8 points
Morgan Countyhighest in the state24158.1%5.8 pCi/L+27.2 points
Wood Countylowest in the state90515.9%1.8 pCi/L−15.0 points
Augusta County, VAborders it62550.1%4.0 pCi/L+19.2 points
Rockingham County, VAborders it1,71443.9%3.3 pCi/L+13.0 points
Randolph County, WVborders it3336.4%2.5 pCi/L+5.5 points
Hardy County, WVborders it5322.6%1.6 pCi/L−8.3 points
Highland County, VAborders it922.2%1.1 pCi/L−8.7 points
Pocahontas County, WVborders it1612.5%1.0 pCi/L−18.4 points
Grant County, WVborders it1649.8%1.1 pCi/L−21.1 points
Where Pendleton County's reported results fell, 2008 to 2017, laboratory, beside West Virginia and the United States
ResultPendleton County testsPendleton County shareWest Virginia shareU.S. shareAgainst West Virginia
Under 2 pCi/L2545.5%37.7%39.6%+7.8 points
2 to 4 pCi/L1323.6%24.7%24.7%−1.1 points
4 pCi/L and above1730.9%37.5%35.7%−6.6 points
Pendleton County ranked among the 27 West Virginia counties with 30 or more tests, by share at or above 4 pCi/L, 2008 to 2017, laboratory
CountyRankTestsAt or above 4 pCi/LMedian
Harrison County11 of 2718736.4%2.6 pCi/L
Randolph County11 of 273336.4%2.5 pCi/L
Wetzel County13 of 275435.2%2.7 pCi/L
Mercer County14 of 2710133.7%2.1 pCi/L
Marshall County15 of 2725431.9%2.5 pCi/L
Pendleton County16 of 275530.9%2.5 pCi/L
Marion County17 of 2724429.1%2.6 pCi/L
Taylor County18 of 273228.1%2.2 pCi/L
Putnam County19 of 275223.1%1.5 pCi/L
Tyler County20 of 273522.9%1.8 pCi/L
Hardy County21 of 275322.6%1.6 pCi/L
Pendleton County ten-year laboratory totals, against West Virginia's pooled share
PeriodTestsAt or above 4 pCi/LMedianHighestWest Virginia, pooledChange from the row before
2008 to 20175530.9%2.5 pCi/L28.0 pCi/L37.5%+7.8 points
2007 to 20162623.1%2.4 pCi/L23.5 pCi/L37.3%−0.9 points
2006 to 20152524.0%2.2 pCi/L20.1 pCi/L37.7%+5.0 points
2005 to 20142119.0%2.2 pCi/L20.1 pCi/L37.3%First on file

Pooled shares: Radon411's sum of CDC's county counts for one period.

Pendleton County, Geology

The ground under Pendleton County

Predicted

Most of the ground under Pendleton County is one class on USGS's geologic map: 98.1% of its land is high radon potential, with 1.9% moderate. 97.6% of it lies in the area the map calls Northern Appalachian Valley and Ridge, to which USGS gives a radon index of 14, in the high band (12 to 17).

USGS's geologic areas under Pendleton County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Northern Appalachian Valley and RidgeSandstone ridges, shale and limestone valleys, mostly DevonianHigh1497.6%
Eastern Allegheny Plateau and MtnsDevonian-Pennsylvanian shale, siltstone, sandstone, minor limestone and coalModerate101.9%

Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.

Pendleton County beside the ground around it

Pendleton County has more high-potential ground than West Virginia as a whole: 98.1% of its land against 18.7%. Of the 7 counties that border it, 2 have more high-potential ground, Highland County, VA the most at 100%.

Share of land by USGS radon potential: Pendleton County, the 7 counties bordering it and West Virginia
AreaEPA zoneLow potentialModerate potentialHigh potential
Pendleton CountyZone 1None1.9%98.1%
Highland County, VAZone 1NoneNone100%
Rockingham County, VAZone 1None4.8%95.2%
Randolph CountyZone 2None97.1%2.9%
Grant CountyZone 1None24.5%75.5%
Hardy CountyZone 1NoneNone100%
Augusta County, VAZone 1None4.9%95.1%
Pocahontas CountyZone 1None53.3%46.7%
West Virginia55 counties, pooled by land areaVaries14.0%67.3%18.7%

The map rates the ground, not the air in any home.

Local help

Pendleton County, Local resources

Radon testing and mitigation in Pendleton County

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

Pendleton County, Questions

Questions about radon in Pendleton County

Are radon levels high in Pendleton County?

Over the 2008 to 2017 laboratory totals, 30.9% of the radon tests reported to CDC for Pendleton County, West Virginia were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.5 pCi/L. Of 27 West Virginia counties with 30 or more tests for the same period, 15 reported a higher share; pooled, the state comes to 37.5%.

Which counties border Pendleton County?

Pendleton County borders 7 counties: Highland County, VA, Rockingham County, VA, Randolph County, WV, Grant County, WV, Hardy County, WV, Augusta County, VA and Pocahontas County, WV.

Products

Pendleton County, Products

Testing a home in Pendleton County

In Pendleton County, 30.9% of 55 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 37.5% pooled across West Virginia. In Zone 1 the year-round level in Pendleton County is the one to know: a long-term test (more than 90 days) or a monitor, with a short-term kit for a first answer.

Test kits and monitors3

See every kit and monitor

Pendleton County is in EPA Zone 1, the highest predicted radon potential. Best radon monitors for Zone 1 counties like Pendleton County

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Pendleton County, Bordering counties

Counties bordering Pendleton County

Calculated by Radon411

Pendleton County, Cities and towns

Cities and towns in Pendleton County

About 5,826 people live in Pendleton County by the Census Bureau's estimate for July 1, 2025, 303 fewer than in 2020 (−4.9%). Spread over its land, that is 8.4 people to the square mile. Franklin, its one incorporated place, has 527 residents, 9.0% of the total. Testing is reported here more often than across the state: CDC's 55 reported tests for 2008 to 2017 come to 9.4 for every 1,000 residents (2025 estimate), against 5.7 for West Virginia.

Franklin is the one incorporated place here; CDC publishes no figure by town, so it reads Pendleton County's.

Franklin, Pendleton County: residents on July 1, 2025
PlaceResidentsSince 2020Share of residents
Franklin527−7.1%9.0%

One incorporated place, as listed in the U.S. Census Bureau’s 2020 place reference files. Residents: U.S. Census Bureau population estimates for July 1, 2025 (Vintage 2025).

Pendleton County, Homes

Homes in Pendleton County

Pendleton County is a place of houses on their own lots: 83% of its 3,708 homes are detached single-family houses, against 71% across West Virginia. Half of its homes were built before 1978, close to West Virginia's 1976: 31% date from before 1960 and 14% from 2000 or later. Owners live in 82% of the occupied homes (West Virginia: 74%), so for most households a test and a fix are their own to order.

Homes in Pendleton County, West Virginia, 2019 to 2023
HomesPendleton CountyWest Virginia
Housing units3,708859,653
Detached houses83%71%
In buildings of 5 or more1%8%
Mobile homes14%14%
Built before 196031%33%
Built since 200014%18%
Middle year built19781976
Owner-occupied82%74%

Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.