Long-term kit
RL416 long-term radon test kit, lab fee included
- Lab fee included
Method: Alpha track
In home: 90 days to 12 months
Locations and reports
Radon Levels in Monroe County, West Virginia
EPA puts Monroe County in Zone 1, its highest radon zone, and only 18 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
56.9%
Giles County
- Giles
- 56.9%
- Alleghany
- 40.0%
3 of 5 neighbours have 30+ tests, 2008 to 2017
Nearest county
52.3%
Greenbrier County, 27 miles
- Greenbrier
- 52.3%
- WV
- 37.5%
Share at 4+ pCi/L, 176 tests, 2008 to 2017
Ground above low
100.0%
14.0 pts above WV
- Monroe
- 100.0%
- WV
- 86.0%
Share of land USGS rates moderate or high potential
Tests reported
18
Too few for a share
- Monroe
- 18
- Needed
- 30
2008 to 2017, laboratory
EPA radon zone
Zone 1
Highest potential
- Zone 1
- 2
- 3
1 highest, 3 lowest
EPA predicts over 4 pCi/L indoors
Read a result for Monroe 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
Monroe County, At a glance
Monroe County at a glance
Predicted: EPA radon zone
EPA Zone 1: highest predicted potential
EPA puts all of Monroe County in
USGS geologic potential: Moderate across 55% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Monroe County, 2008 to 2017, laboratory
CDC holds 18 reported tests for Monroe County over the 2008 to 2017 laboratory totals, with a median of 3.6 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Monroe County beside the counties around it is how this page reads it.
What these figures count
Only 18 tests were reported to CDC for Monroe 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).
Monroe County, Compared
Monroe County radon figures, compared
Calculated by Radon411CDC's largest figure for Monroe County rests on 18 tests over the 2008 to 2017 laboratory totals, 6 of them at or above 4 pCi/L, so each test moves its share by 5.6 points and no rank or comparison is drawn from it. Results reached as high as 12.6 pCi/L, with a middle value of 3.6 pCi/L.
Of the counties bordering it, 3 have a figure over the 2008 to 2017 laboratory totals: Giles County, VA reported the largest share at or above 4 pCi/L, 56.9%, and Alleghany County, VA the smallest, 40.0%, with Greenbrier County at 52.3% between. Farther out, Mercer County (33 miles away) at 33.7%, Raleigh County (41 miles away) at 16.7% and Kanawha County (76 miles away) at 20.6% 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 Monroe County in Zone 1, the map's highest label: a predicted county average above 4 pCi/L. USGS geology rates 55% of the county's land moderate radon potential.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Monroe County, Geology
The ground under Monroe County
PredictedUSGS's geologic map splits Monroe County: 54.8% of its land is moderate radon potential and 45.2% high. The map puts 54.8% of Monroe County in the area it calls Southern Appalachian Valley and Ridge and 44.5% in Northern Appalachian Valley and Ridge, with one smaller area beside them. USGS gives the first a radon index of 11, in the moderate band (9 to 11), and the second 14, in the high band (12 to 17).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Southern Appalachian Valley and Ridge | Ordovician-Mississippian shale, siltstone, sandstone, limestone. | Moderate | 11 | 54.8% |
| Northern Appalachian Valley and Ridge | Sandstone ridges, shale and limestone valleys, mostly Devonian | High | 14 | 44.5% |
| Valley and Ridge | Cambrian dolomite, limestone, shale, and sandstone, Silurian-Ordovician limestone, dolomite, shale, and sandstone, Mississippian-Devonian sandstone, shale, limestone, gypsum, and coal. | High | 15 | 0.7% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Monroe County beside the ground around it
Monroe County has more high-potential ground than West Virginia as a whole: 45.2% of its land against 18.7%. Of the 5 counties that border it, 3 have more high-potential ground, Craig County, VA the most at 100%.
The map rates the ground, not the air in any home.
Local help
Monroe County, Local resources
Radon testing and mitigation in Monroe 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
Monroe County, Questions
Questions about radon in Monroe County
Are radon levels high in Monroe County?
Over the 2008 to 2017 laboratory totals, 33.3% of the radon tests reported to CDC for Monroe County, West Virginia were at or above 4 pCi/L, and the median reported pre-mitigation result was 3.6 pCi/L. Of the counties bordering it, 3 have a figure over the 2008 to 2017 laboratory totals: Giles County, VA reported the largest share at or above 4 pCi/L, 56.9%, and Alleghany County, VA the smallest, 40.0%, with Greenbrier County at 52.3% between.
Which counties border Monroe County?
Monroe County borders 5 counties: Giles County, VA, Summers County, WV, Craig County, VA, Alleghany County, VA and Greenbrier County, WV.
Products
Monroe County, Products
Testing a home in Monroe County
No CDC figure names Monroe County; the nearest county with one, Greenbrier County (27 miles away), reported 52.3% 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 1 the year-round level in Monroe 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
MonitorAEGTEST
HOUND-3786 rechargeable radon monitor with a 3.5-inch color screen
- C-NRPP 2024/25: Not included
- Battery
- Alarm
- Screen
Method: Ion chamber
First reading: Within 10 minutes
Short-term kitFirst Alert
RD1 short-term charcoal radon test kit
- Lab fee included
Method: Charcoal
In home: 2 to 4 days
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Monroe County is in EPA Zone 1, the highest predicted radon potential. Best radon monitors for Zone 1 counties like Monroe County
Explore
Monroe County, Bordering counties
Counties bordering Monroe County
Calculated by Radon411- Radon levels in Giles County, VAEPA zone 1
56.9%at or above 4 pCi/L
Median 4.8 pCi/L · 174 tests
- Radon levels in Greenbrier County, WVEPA zone 1
52.3%at or above 4 pCi/L
Median 4.5 pCi/L · 176 tests
- Radon levels in Craig County, VAEPA zone 1
46.2%at or above 4 pCi/L
Median 2.8 pCi/L · 13 tests
- Radon levels in Alleghany County, VAEPA zone 1
40.0%at or above 4 pCi/L
Median 3.0 pCi/L · 50 tests
- Radon levels in Summers County, WVEPA zone 1
13.3%at or above 4 pCi/L
Median 1.5 pCi/L · 15 tests
Monroe County, Cities and towns
Cities and towns in Monroe County
The Census Bureau estimates 12,491 residents in Monroe County for July 1, 2025, 103 more than in 2020 (+0.8%). That works out to 26 people per square mile of land. Alderson, the largest place on its list (925 residents in all), extends beyond Monroe County, so no share of the total is worked out for it. Reported testing is thin here: 18 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 Alderson to Union, CDC publishes no figure by town: each reads Monroe County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Aldersonextends beyond Monroe County | 925 | −4.5% | Counted whole |
| Peterstown | 449 | +0.4% | 3.6% |
| Union | 418 | −0.5% | 3.3% |
3 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). A place that extends beyond Monroe County is counted whole, so it has no share.
Monroe County, Homes
Homes in Monroe County
Monroe County is a place of houses on their own lots: 81% of its 6,263 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: 26% date from before 1960 and 16% from 2000 or later. Owners live in 83% of the occupied homes (West Virginia: 74%), so for most households a test and a fix are their own to order.
| Homes | Monroe County | West Virginia |
|---|---|---|
| Housing units | 6,263 | 859,653 |
| Detached houses | 81% | 71% |
| In buildings of 5 or more | 1% | 8% |
| Mobile homes | 17% | 14% |
| Built before 1960 | 26% | 33% |
| Built since 2000 | 16% | 18% |
| Middle year built | 1978 | 1976 |
| Owner-occupied | 83% | 74% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.