Long-term kit
RL116 long-term radon test kit
- Lab fee extra
Method: Alpha track
In home: 90 days to 12 months
Locations and reports
Radon Levels in Fayette County, Ohio
EPA puts Fayette County in Zone 1, its highest radon zone, and only 12 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
81.4%
Pickaway County
- Pickaway
- 81.4%
- Clinton
- 52.4%
6 of 6 neighbours have 30+ tests, 2008 to 2017
Nearest county
52.4%
Clinton County, 21 miles
- Clinton
- 52.4%
- Ohio
- 52.3%
Share at 4+ pCi/L, 103 tests, 2008 to 2017
Ground above low
100.0%
0.1 pts above Ohio
- Fayette
- 100.0%
- Ohio
- 99.9%
Share of land USGS rates moderate or high potential
Tests reported
27
Too few for a share
- Fayette
- 27
- Needed
- 30
2005 to 2014, 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 Fayette 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
Fayette County, At a glance
Fayette County at a glance
Predicted: EPA radon zone
EPA Zone 1: highest predicted potential
EPA puts all of Fayette County in
USGS geologic potential: High across 100% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Fayette County, 2008 to 2017, laboratory
CDC holds 12 reported tests for Fayette County over the 2008 to 2017 laboratory totals, with a median of 5.5 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Fayette County beside the counties around it is how this page reads it.
What these figures count
Only 12 tests were reported to CDC for Fayette 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).
Fayette County, Compared
Fayette County radon figures, compared
Calculated by Radon411CDC's largest figure for Fayette County rests on 27 tests over the 2005 to 2014 laboratory totals, 15 of them at or above 4 pCi/L, so each test moves its share by 3.7 points and no rank or comparison is drawn from it. Results reached as high as 36.5 pCi/L, with a middle value of 4.2 pCi/L.
Of the counties bordering it, 6 have a figure over the 2008 to 2017 laboratory totals: Pickaway County reported the largest share at or above 4 pCi/L, 81.4%, and Clinton County the smallest, 52.4%, with Madison County at 67.4%, Ross County at 67.1% and Greene County at 58.6% between. Farther out, Clark County (30 miles away) at 57.5% and Franklin County (37 miles away) at 71.9% have figures too. Pooled across 88 Ohio counties, 52.3% of reported tests reached that level; across every county in the country with a figure, 35.7%.
Statewide for the same period, Pickaway County reported the highest share (81.4%) and Cuyahoga County the lowest (21.7%). EPA's 1993 map puts Fayette County in Zone 1, the map's highest label: a predicted county average above 4 pCi/L. USGS geology rates 100% of the county's land high radon potential.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Fayette County, Geology
The ground under Fayette County
PredictedUSGS's geologic map puts all of Fayette County's mapped land in one class: high radon potential. All of it lies in the area the map calls Till Plains, to which USGS gives a radon index of 14, in the high band (12 to 17).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Till Plains | Glacial deposits underlain by Ordovician through Devonian limestone and shale. | High | 14 | 100% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Fayette County beside the ground around it
Fayette County has more high-potential ground than Ohio as a whole: 100% of its land against 62.8%. Of the 6 counties that border it, none has as large a share of high-potential ground; Greene County comes nearest at 100%.
The map rates the ground, not the air in any home.
Local help
Fayette County, Local resources
Radon testing and mitigation in Fayette County
- Radon Education and Licensing ProgramRadon Education and Licensing Program, run by Ohio Department of Health, licenses or certifies radon professionals and offers free or discounted test kits, and answers questions about testing and mitigation in Ohio.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsThe program says:
Free radon test kits are available for Ohio homeowners.
- Compare kits
- Professionals in Ohio479 professionals are listed in Ohio.
What Ohio's program says
- Phone
- 614-728-0272
- indoor.radon@odh.ohio.gov
- Licensing of radon professionals
This program licenses companies and persons directly involved with the radon testing and mitigation industry.
What it means
Fayette County, Questions
Questions about radon in Fayette County
Are radon levels high in Fayette County?
Over the 2008 to 2017 laboratory totals, 58.3% of the radon tests reported to CDC for Fayette County, Ohio were at or above 4 pCi/L, and the median reported pre-mitigation result was 5.5 pCi/L. Of the counties bordering it, 6 have a figure over the 2008 to 2017 laboratory totals: Pickaway County reported the largest share at or above 4 pCi/L, 81.4%, and Clinton County the smallest, 52.4%, with Madison County at 67.4%, Ross County at 67.1% and Greene County at 58.6% between.
Which counties border Fayette County?
Fayette County borders 6 counties: Clinton County, Pickaway County, Madison County, Highland County, Greene County and Ross County.
Products
Fayette County, Products
Testing a home in Fayette County
No CDC figure names Fayette County; the nearest county with one, Clinton County (21 miles away), reported 52.4% 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 1 the year-round level in Fayette 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
Monitor
RadonScan USB-powered radon monitor with a color screen
- C-NRPP 2024/25: Not included
- Plug-in
- Alarm
- Screen
First reading: Within 5 minutes
Short-term kitKidde
442020 short-term charcoal radon test kit
- Lab fee included
Method: Charcoal
In home: 3 days
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Fayette County is in EPA Zone 1, the highest predicted radon potential. Best radon monitors for Zone 1 counties like Fayette County
Explore
Fayette County, Bordering counties
Counties bordering Fayette County
Calculated by Radon411- Radon levels in Pickaway CountyEPA zone 1
81.4%at or above 4 pCi/L
Median 9.5 pCi/L · 183 tests
- Radon levels in Madison CountyEPA zone 1
67.4%at or above 4 pCi/L
Median 5.7 pCi/L · 549 tests
- Radon levels in Ross CountyEPA zone 1
67.1%at or above 4 pCi/L
Median 7.0 pCi/L · 368 tests
- Radon levels in Greene CountyEPA zone 1
58.6%at or above 4 pCi/L
Median 4.9 pCi/L · 2,602 tests
- Radon levels in Highland CountyEPA zone 2
56.7%at or above 4 pCi/L
Median 4.8 pCi/L · 67 tests
- Radon levels in Clinton CountyEPA zone 1
52.4%at or above 4 pCi/L
Median 4.2 pCi/L · 103 tests
Fayette County, Cities and towns
Cities and towns in Fayette County
About 28,552 people live in Fayette County by the Census Bureau's estimate for July 1, 2025, 417 fewer than in 2020 (−1.4%). That works out to 70 people per square mile of land. Washington Court House alone is home to 14,375 of them, 50.3% of the total. Reported testing is thin here: 27 tests over 2005 to 2014, or 0.9 for every 1,000 residents (2025 estimate), where Ohio as a whole comes to 7.0.
From Washington Court House to Octa, CDC publishes no figure by town: each reads Fayette County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Washington Court House | 14,375 | −0.4% | 50.3% |
| Jeffersonville | 1,246 | −2.7% | 4.4% |
| Bloomingburg | 856 | −2.5% | 3.0% |
| New Hollandextends beyond Fayette County | 833 | +4.1% | Counted whole |
| Milledgeville | 97 | −3.0% | 0.3% |
| Octa | 58 | +3.6% | 0.2% |
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). A place that extends beyond Fayette County is counted whole, so it has no share.
Fayette County, Homes
Homes in Fayette County
Of Fayette County's 12,694 homes, 75% are detached houses, against 69% across Ohio; 7% are in buildings of five or more homes. Half of its homes were built before 1970, close to Ohio's 1970: 39% date from before 1960 and 14% from 2000 or later. 63% of occupied homes are lived in by their owner (Ohio: 67%); in the rest a tenant can run a test, but a fix is the landlord's to make.
| Homes | Fayette County | Ohio |
|---|---|---|
| Housing units | 12,694 | 5,271,573 |
| Detached houses | 75% | 69% |
| In buildings of 5 or more | 7% | 15% |
| Mobile homes | 4% | 4% |
| Built before 1960 | 39% | 38% |
| Built since 2000 | 14% | 16% |
| Middle year built | 1970 | 1970 |
| Owner-occupied | 63% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.