Short-term kit
Air Chek Short-Term radon test kit you hang, lab fee included
- Lab fee included
In home: 72 to 168 hours
Locations and reports
Radon Levels in Lewis County, West Virginia
EPA puts Lewis County in Zone 2, its middle radon zone, and only 23 radon tests from it are on file with CDC (2008 to 2017, laboratory totals). Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Highest bordering
36.4%
Harrison County
- Harrison
- 36.4%
1 of 6 neighbours have 30+ tests, 2008 to 2017
Nearest county
36.4%
Harrison County, 21 miles
- Harrison
- 36.4%
- WV
- 37.5%
Share at 4+ pCi/L, 187 tests, 2008 to 2017
Ground above low
100.0%
14.0 pts above WV
- Lewis
- 100.0%
- WV
- 86.0%
Share of land USGS rates moderate or high potential
Tests reported
23
Too few for a share
- Lewis
- 23
- Needed
- 30
2008 to 2017, laboratory
EPA radon zone
Zone 2
Moderate potential
- 1
- Zone 2
- 3
1 highest, 3 lowest
EPA predicts 2 to 4 pCi/L indoors
Read a result for Lewis County
Starts at EPA's action level
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
- Under 20 to 1.9 pCi/L
- 2 to 4consider a fix
- 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.
The data
Lewis County, At a glance
Lewis County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Lewis County is a
USGS geologic potential: Moderate across 100% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Lewis County, 2008 to 2017, laboratory
CDC holds 23 reported tests for Lewis County over the 2008 to 2017 laboratory totals, with a median of 2.0 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Lewis County beside the counties around it is how this page reads it.
What these figures count
Only 23 tests were reported to CDC for Lewis County over 2008 to 2017 (laboratory totals), and tests are often run on homes being sold or already suspected of a problem: so few describe neither the county nor this house.
Measured: CDC tracking data. Figure above: 2008 to 2017, laboratory. Measured data period: 2005 to 2017 (every CDC figure on file).
Lewis County, Compared
Lewis County radon figures, compared
Calculated by Radon411CDC's largest figure for Lewis County rests on 23 tests over the 2008 to 2017 laboratory totals, 3 of them at or above 4 pCi/L, so each test moves its share by 4.3 points and no rank or comparison is drawn from it. Results reached as high as 4.6 pCi/L, with a middle value of 2.0 pCi/L.
Harrison County, the one bordering county with a figure over the 2008 to 2017 laboratory totals, reported 36.4% of its tests at or above 4 pCi/L. Farther out, Taylor County (34 miles away) at 28.1%, Randolph County (37 miles away) at 36.4% and Marion County (38 miles away) at 29.1% have figures too. Pooled across 55 West Virginia counties, 37.5% of reported tests reached that level; across every county in the country with a figure, 35.7%.
Statewide for the same period, Morgan County reported the highest share (58.1%) and Grant County the lowest (9.8%). EPA's 1993 map puts Lewis County in Zone 2, its middle label: a predicted county average between 2 and 4 pCi/L. USGS geology rates 100% of the county's land moderate radon potential.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Lewis County, Geology
The ground under Lewis County
PredictedUSGS's geologic map puts all of Lewis County's mapped land in one class: moderate radon potential. 98.6% of it lies in the area the map calls Central Allegheny Plateau, to which USGS gives a radon index of 10, in the moderate band (9 to 11).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Central Allegheny Plateau | Permian and Pennsylvanian shale, siltstone, sandstone, minor limestone. | Moderate | 10 | 98.6% |
| Eastern Allegheny Plateau and Mtns | Devonian-Pennsylvanian shale, siltstone, sandstone, minor limestone and coal | Moderate | 10 | 1.4% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Lewis County beside the ground around it
Across West Virginia 18.7% of the land is rated high; none of Lewis County's is. Of the 6 counties that border it, none has as large a share of moderate-potential ground; Braxton County comes nearest at 100%.
The map rates the ground, not the air in any home.
Local help
Lewis County, Local resources
Radon testing and mitigation in Lewis County
- OEHS Radon ProgramOEHS Radon Program, run by WV DHHR OEHS Radiation, Toxics & Indoor Air Division, licenses or certifies radon professionals and offers free or discounted test kits, and answers questions about testing and mitigation in West Virginia.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsThe program says:
West Virginia residents can request a free Radon Test Kit by emailing Radon@wv.gov or calling 304-352-5039
- Compare kits
- Professionals in West Virginia35 professionals are listed in West Virginia.
What West Virginia's program says
- Phone
- 304-352-5039
- 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
Lewis County, Questions
Questions about radon in Lewis County
Are radon levels high in Lewis County?
Over the 2008 to 2017 laboratory totals, 13.0% of the radon tests reported to CDC for Lewis County, West Virginia were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.0 pCi/L. Harrison County, the one bordering county with a figure over the 2008 to 2017 laboratory totals, reported 36.4% of its tests at or above 4 pCi/L.
Which counties border Lewis County?
Lewis County borders 6 counties: Upshur County, Gilmer County, Braxton County, Doddridge County, Harrison County and Webster County.
Products
Lewis County, Products
Testing a home in Lewis County
No CDC figure names Lewis County; the nearest county with one, Harrison County (21 miles away), reported 36.4% of its tests at or above 4 pCi/L over the 2008 to 2017 laboratory totals, the only reading nearby until a test of this home. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Lewis County; a long-term test tells the year-round average.
Test kits and monitors3
See every kit and monitor
Long-term kit
RL116 long-term radon test kit
- Lab fee extra
Method: Alpha track
In home: 90 days to 12 months
MonitorX-Sense
XR0A-iR Wi-Fi battery radon detector with a screen
- C-NRPP 2024/25: Not included
- Battery
- Wi-Fi
- Screen, app
Method: Alpha spectrometry
First reading: Within 24 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Lewis County, Bordering counties
Counties bordering Lewis County
Calculated by Radon411- Radon levels in Harrison CountyEPA zone 2
36.4%at or above 4 pCi/L
Median 2.6 pCi/L · 187 tests
- Radon levels in Braxton CountyEPA zone 2
25.0%at or above 4 pCi/L
Median 1.3 pCi/L · 12 tests
- Radon levels in Webster CountyEPA zone 2
21.4%at or above 4 pCi/L
Median 1.3 pCi/L · 14 tests
- Radon levels in Upshur CountyEPA zone 2
20.7%at or above 4 pCi/L
Median 2.6 pCi/L · 29 tests
- Radon levels in Gilmer CountyEPA zone 2
12.5%at or above 4 pCi/L
Median 2.1 pCi/L · 8 tests
- Radon levels in Doddridge CountyEPA zone 2
0.0%at or above 4 pCi/L
Median 0.5 pCi/L · 1 test
Lewis County, Cities and towns
Cities and towns in Lewis County
About 16,394 people live in Lewis County by the Census Bureau's estimate for July 1, 2025, 627 fewer than in 2020 (−3.7%). That works out to 42 people per square mile of land. Its largest town, Weston, has 3,736 residents, 22.8% of the total. Together its 2 incorporated places hold 25.2% of those residents; the other 74.8% live outside any of them. Reported testing is thin here: 23 tests over 2008 to 2017, or 1.4 for every 1,000 residents (2025 estimate), where West Virginia as a whole comes to 5.7.
From Weston to Jane Lew, CDC publishes no figure by town: each reads Lewis County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Weston | 3,736 | −5.2% | 22.8% |
| Jane Lew | 395 | −4.8% | 2.4% |
2 incorporated places, 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).
Lewis County, Homes
Homes in Lewis County
Of Lewis County's 8,188 homes, 71% are detached houses, against 71% across West Virginia; 20% are mobile homes. Half of its homes were built before 1977, close to West Virginia's 1976: 35% date from before 1960 and 19% from 2000 or later. 71% of occupied homes are lived in by their owner (West Virginia: 74%); in the rest a tenant can run a test, but a fix is the landlord's to make.
| Homes | Lewis County | West Virginia |
|---|---|---|
| Housing units | 8,188 | 859,653 |
| Detached houses | 71% | 71% |
| In buildings of 5 or more | 6% | 8% |
| Mobile homes | 20% | 14% |
| Built before 1960 | 35% | 33% |
| Built since 2000 | 19% | 18% |
| Middle year built | 1977 | 1976 |
| Owner-occupied | 71% | 74% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.