Short-term kit
PicoCan short-term charcoal canister radon test
- Lab fee included
Method: Charcoal
In home: 48 to 96 hours
Locations and reports
Radon Levels in Clay County, Kentucky
EPA puts Clay County in Zone 2, its middle radon zone, and only 10 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
22.0%
Laurel County
- Laurel
- 22.0%
1 of 7 neighbours have 30+ tests, 2008 to 2017
Nearest county
22.0%
Laurel County, 23 miles
- Laurel
- 22.0%
- Kentucky
- 43.7%
Share at 4+ pCi/L, 100 tests, 2008 to 2017
Ground above low
100.0%
5.7 pts above Kentucky
- Clay
- 100.0%
- Kentucky
- 94.3%
Share of land USGS rates moderate or high potential
Tests reported
10
Too few for a share
- Clay
- 10
- 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 Clay 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
Clay County, At a glance
Clay County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Clay 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 Clay County, 2008 to 2017, laboratory
CDC holds 10 reported tests for Clay County over the 2008 to 2017 laboratory totals, with a median of 2.1 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Clay County beside the counties around it is how this page reads it.
What these figures count
Only 10 tests were reported to CDC for Clay 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).
Clay County, Compared
Clay County radon figures, compared
Calculated by Radon411CDC's largest figure for Clay County rests on 10 tests over the 2008 to 2017 laboratory totals, 2 of them at or above 4 pCi/L, so each test moves its share by 10.0 points and no rank or comparison is drawn from it. Results reached as high as 6.3 pCi/L, with a middle value of 2.1 pCi/L.
Laurel County, the one bordering county with a figure over the 2008 to 2017 laboratory totals, reported 22.0% of its tests at or above 4 pCi/L. Farther out, Breathitt County (33 miles away) at 19.1%, Estill County (39 miles away) at 44.1% and Pulaski County (48 miles away) at 59.5% have figures too. Pooled across 120 Kentucky counties, 43.7% of reported tests reached that level; across every county in the country with a figure, 35.7%.
Statewide for the same period, Meade County reported the highest share (68.4%) and Hopkins County the lowest (9.5%). EPA's 1993 map puts Clay 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.
Clay County, Geology
The ground under Clay County
PredictedUSGS's geologic map puts all of Clay County's mapped land in one class: moderate radon potential. All of it lies in the area the map calls Cumberland Plateau, to which USGS gives a radon index of 9, in the moderate band (9 to 11).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Cumberland Plateau | Pennsylvanian sandstones, siltstones, and shales. | Moderate | 9 | 100% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Clay County beside the ground around it
Across Kentucky 18.2% of the land is rated high; none of Clay County's is. Of the 7 counties that border it, 1 has more high-potential ground, Bell County the most at 4.5%.
The map rates the ground, not the air in any home.
Local help
Clay County, Local resources
Radon testing and mitigation in Clay County
- Kentucky's radon programKentucky Board of Radon SafetyKentucky's radon program answers questions about testing, mitigation and the rules in Kentucky.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsAsk the program whether it has free or discounted kits, or compare kits you can buy.
- Compare kits
- Professionals in Kentucky8 professionals are listed in Kentucky.
What Kentucky's program says
- Phone
- 502-782-2782
- Radon@ky.gov
What it means
Clay County, Questions
Questions about radon in Clay County
Are radon levels high in Clay County?
Over the 2008 to 2017 laboratory totals, 20.0% of the radon tests reported to CDC for Clay County, Kentucky were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.1 pCi/L. Laurel County, the one bordering county with a figure over the 2008 to 2017 laboratory totals, reported 22.0% of its tests at or above 4 pCi/L.
Which counties border Clay County?
Clay County borders 7 counties: Owsley County, Knox County, Laurel County, Leslie County, Jackson County, Bell County and Perry County.
Products
Clay County, Products
Testing a home in Clay County
No CDC figure names Clay County; the nearest county with one, Laurel County (23 miles away), reported 22.0% 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 Clay County; a long-term test tells the year-round average.
Test kits and monitors3
See every kit and monitor
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
Monitor
RM-65 rechargeable radon detector with a color screen and alarm
- C-NRPP 2024/25: Not included
- Battery
- Alarm
- Screen
Method: Semiconductor sensor
First reading: Within 6 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Clay County, Bordering counties
Counties bordering Clay County
Calculated by Radon411- Radon levels in Owsley CountyEPA zone 2
62.5%at or above 4 pCi/L
Median 18.3 pCi/L · 8 tests
- Radon levels in Laurel CountyEPA zone 2
22.0%at or above 4 pCi/L
Median 1.9 pCi/L · 100 tests
- Radon levels in Perry CountyEPA zone 2
20.8%at or above 4 pCi/L
Median 1.4 pCi/L · 24 tests
- Radon levels in Bell CountyEPA zone 2
12.5%at or above 4 pCi/L
Median 1.3 pCi/L · 8 tests
- Radon levels in Knox CountyEPA zone 2
10.3%at or above 4 pCi/L
Median 2.1 pCi/L · 29 tests
- Radon levels in Leslie CountyEPA zone 2
10.0%at or above 4 pCi/L
Median 0.1 pCi/L · 10 tests
- Radon levels in Jackson CountyEPA zone 2
0.0%at or above 4 pCi/L
Median 1.8 pCi/L · 11 tests
Clay County, Cities and towns
Cities and towns in Clay County
About 19,465 people live in Clay County by the Census Bureau's estimate for July 1, 2025, 843 fewer than in 2020 (−4.2%). That works out to 41 people per square mile of land. Manchester, its one incorporated place, has 1,411 residents, 7.2% of the total. Reported testing is thin here: 10 tests over 2008 to 2017, or 0.5 for every 1,000 residents (2025 estimate), where Kentucky as a whole comes to 6.3.
Manchester is the one incorporated place here; CDC publishes no figure by town, so it reads Clay County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Manchester | 1,411 | −7.2% | 7.2% |
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).
Clay County, Homes
Homes in Clay County
Of Clay County's 8,642 homes, 63% are detached houses, against 68% across Kentucky; 30% are mobile homes. Half of its homes were built before 1987, close to Kentucky's 1982: 11% date from before 1960 and 27% from 2000 or later. Owners live in 78% of the occupied homes (Kentucky: 68%), so for most households a test and a fix are their own to order.
| Homes | Clay County | Kentucky |
|---|---|---|
| Housing units | 8,642 | 2,010,655 |
| Detached houses | 63% | 68% |
| In buildings of 5 or more | 4% | 12% |
| Mobile homes | 30% | 11% |
| Built before 1960 | 11% | 22% |
| Built since 2000 | 27% | 24% |
| Middle year built | 1987 | 1982 |
| Owner-occupied | 78% | 68% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.