Short-term kit
Radon Short Term Test Kit short-term charcoal radon test kit, lab fee included
- Lab fee included
Method: Charcoal
In home: 2 to 7 days
Locations and reports
Radon Levels in Mason County, West Virginia
EPA puts Mason County in Zone 2, its middle radon zone, and only 13 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
23.1%
Putnam County
- Putnam
- 23.1%
- Cabell
- 16.6%
2 of 5 neighbours have 30+ tests, 2008 to 2017
Nearest county
23.1%
Putnam County, 19 miles
- Putnam
- 23.1%
- WV
- 37.5%
Share at 4+ pCi/L, 52 tests, 2008 to 2017
Ground above low
100.0%
14.0 pts above WV
- Mason
- 100.0%
- WV
- 86.0%
Share of land USGS rates moderate or high potential
Tests reported
17
Too few for a share
- Mason
- 17
- Needed
- 30
2007 to 2016, 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 Mason 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
Mason County, At a glance
Mason County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Mason 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 Mason County, 2008 to 2017, laboratory
CDC holds 13 reported tests for Mason County over the 2008 to 2017 laboratory totals, with a median of 2.4 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Mason County beside the counties around it is how this page reads it.
What these figures count
Only 13 tests were reported to CDC for Mason 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).
Mason County, Compared
Mason County radon figures, compared
Calculated by Radon411CDC's largest figure for Mason County rests on 17 tests over the 2007 to 2016 laboratory totals, 3 of them at or above 4 pCi/L, so each test moves its share by 5.9 points and no rank or comparison is drawn from it. Results reached as high as 10.6 pCi/L, with a middle value of 2.4 pCi/L.
Of the counties bordering it, 2 have a figure over the 2008 to 2017 laboratory totals: Putnam County reported the largest share at or above 4 pCi/L, 23.1%, and Cabell County the smallest, 16.6%. Farther out, Kanawha County (40 miles away) at 20.6%, Wood County (41 miles away) at 15.9% and Tyler County (78 miles away) at 22.9% 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 Mason 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.
Mason County, Geology
The ground under Mason County
PredictedUSGS's geologic map puts all of Mason County's mapped land in one class: moderate radon potential. 99.1% 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 | 99.1% |
| Unglaciated Plateau | Mississippian through Permian limestone, dolomite, and shale. | Moderate | 11 | 0.9% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Mason County beside the ground around it
Across West Virginia 18.7% of the land is rated high; none of Mason County's is. Of the 5 counties that border it, none has as large a share of moderate-potential ground; Gallia County, OH comes nearest at 100%.
The map rates the ground, not the air in any home.
Local help
Mason County, Local resources
Radon testing and mitigation in Mason 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
Mason County, Questions
Questions about radon in Mason County
Are radon levels high in Mason County?
Over the 2008 to 2017 laboratory totals, 23.1% of the radon tests reported to CDC for Mason County, West Virginia were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.4 pCi/L. Of the counties bordering it, 2 have a figure over the 2008 to 2017 laboratory totals: Putnam County reported the largest share at or above 4 pCi/L, 23.1%, and Cabell County the smallest, 16.6%.
Which counties border Mason County?
Mason County borders 5 counties: Jackson County, WV, Meigs County, OH, Putnam County, WV, Gallia County, OH and Cabell County, WV.
Products
Mason County, Products
Testing a home in Mason County
No CDC figure names Mason County; the nearest county with one, Putnam County (19 miles away), reported 23.1% 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 Mason 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
Monitor
EcoBlu plug-in digital radon monitor with a display
- C-NRPP 2024/25: Not included
- Plug-in
- Alarm
- Screen
Method: Ion chamber
First reading: Within 10 minutes
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Mason County, Bordering counties
Counties bordering Mason County
Calculated by Radon411- Radon levels in Gallia County, OHEPA zone 2
33.3%at or above 4 pCi/L
Median 3.0 pCi/L · 21 tests
- Radon levels in Jackson County, WVEPA zone 2
25.0%at or above 4 pCi/L
Median 2.5 pCi/L · 24 tests
- Radon levels in Putnam County, WVEPA zone 2
23.1%at or above 4 pCi/L
Median 1.5 pCi/L · 52 tests
- Radon levels in Meigs County, OHEPA zone 2
20.0%at or above 4 pCi/L
Median 2.7 pCi/L · 20 tests
- Radon levels in Cabell County, WVEPA zone 2
16.6%at or above 4 pCi/L
Median 2.0 pCi/L · 145 tests
Mason County, Cities and towns
Cities and towns in Mason County
About 24,707 people live in Mason County by the Census Bureau's estimate for July 1, 2025, 696 fewer than in 2020 (−2.7%). That works out to 57 people per square mile of land. No town dominates: Point Pleasant, the largest, has 3,869 residents, 15.7% of the total. Together its 6 incorporated places hold 28.0% of those residents; the other 72.0% live outside any of them. Reported testing is thin here: 17 tests over 2007 to 2016, or 0.7 for every 1,000 residents (2025 estimate), where West Virginia as a whole comes to 5.5.
From Point Pleasant to Leon, CDC publishes no figure by town: each reads Mason County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Point Pleasant | 3,869 | −4.5% | 15.7% |
| New Haven | 1,385 | −4.2% | 5.6% |
| Mason | 832 | −2.8% | 3.4% |
| Hartford City | 488 | −1.4% | 2.0% |
| Henderson | 220 | −3.1% | 0.9% |
| Leon | 129 | −5.1% | 0.5% |
6 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).
Mason County, Homes
Homes in Mason County
Of Mason County's 12,192 homes, 71% are detached houses, against 71% across West Virginia; 22% are mobile homes. Half of its homes were built before 1976, close to West Virginia's 1976: 31% date from before 1960 and 20% 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 | Mason County | West Virginia |
|---|---|---|
| Housing units | 12,192 | 859,653 |
| Detached houses | 71% | 71% |
| In buildings of 5 or more | 4% | 8% |
| Mobile homes | 22% | 14% |
| Built before 1960 | 31% | 33% |
| Built since 2000 | 20% | 18% |
| Middle year built | 1976 | 1976 |
| Owner-occupied | 82% | 74% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.