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 Claiborne County, Tennessee
EPA puts Claiborne County in Zone 1, its highest radon zone, and only 8 radon tests from it are on file with CDC (2023). Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Share at 4+ pCi/L
44.0%
10.7 pts above TN
- Claiborne
- 44.0%
- Tennessee
- 33.3%
125 tests, 2008 to 2017
Median result
3.3pCi/L
Below action level
- Claiborne
- 3.3 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
125
41st of 80 by tests
- Claiborne
- 125
- Davidson
- 5,592
Reported to CDC before any fix, 2008 to 2017
EPA radon zone
Zone 1
Highest potential
- Zone 1
- 2
- 3
1 highest, 3 lowest
EPA predicts over 4 pCi/L indoors
Rank in Tennessee
18 of 80
Top quarter
- Claiborne
- 44.0%
- Jefferson
- 56.8%
By share, of 80 with 30+ tests
Read a result for Claiborne County
Starts at Claiborne County's median, 3.3 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 3.3 pCi/L
Between 2 and 4 pCi/L
- Under 20 to 1.9 pCi/L
- 2 to 4consider a fix
- 4 and aboveEPA says fix it
This result is between 2 and 4 pCi/L. EPA recommends considering a fix when the level is between 2 and 4 pCi/L. Claiborne County's median reported result, 2008 to 2017.
The data
Claiborne County, At a glance
Claiborne County at a glance
Predicted: EPA radon zone
EPA Zone 1: highest predicted potential
EPA puts all of Claiborne County in
USGS geologic potential: High across 89% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Claiborne County, 2023
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2022 | 8.3% |
| 2023 | 50.0% |
2023: 50.0%. Across these years the share ran from 8.3% to 50.0%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
Only 8 tests were reported to CDC for Claiborne County over 2023, 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: 2023. Measured data period: 2005 to 2023 (every CDC figure on file).
Claiborne County, Compared
Claiborne County radon figures, compared
Calculated by Radon411In Claiborne County, about 4 in 10 reported tests over the 2008 to 2017 laboratory totals (55 of 125) were at or above EPA's action level. Against the national pool of 35.7%, the gap is 8.3 points higher. Across 95 Tennessee counties pooled together, 33.3% of tests reached that level, so Claiborne County runs 10.7 points above its state.
The newest figure, in 2023, counts only 8 tests (50.0% at or above 4 pCi/L), too few to compare, so this reading uses the 125-test figure.
Of 3 neighbours with a figure, 2 reported a larger share at or above 4 pCi/L and 1 a smaller one; the spread is 37.7% (Union County) to 53.5% (Campbell County). By share, Claiborne County is 18th of 80 Tennessee counties with 30 or more tests for the same period.
Half the tests came in under 3.3 pCi/L and half over it; the single highest reached 114.5 pCi/L. Below the action level, 46 tests (36.8%) came in under 2 pCi/L, against 42.4% statewide, and 24 tests (19.2%) fell between 2 and 4, against 24.3% statewide.
Zone 1 on EPA's map (predicted average above 4 pCi/L) and a 44.0% share point the same way here. USGS geology rates 89% of the county's land high radon potential. CDC also counts 7 tests taken after mitigation in Claiborne County for the same period: tests in homes where a fix was already in.
The busiest year on file was 2022, with 36 tests reported; the quietest, 2023, had 8.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Claiborne County, Geology
The ground under Claiborne County
PredictedMost of the ground under Claiborne County is one class on USGS's geologic map: 89.0% of its land is high radon potential, with 11.0% low. The map puts 89.0% of Claiborne County in the area it calls Ridge and Valley and 11.0% in Appalachian Plateau. USGS gives the first a radon index of 14, in the high band (12 to 17), and the second 8, in the low band (5 to 8).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Ridge and Valley | Paleozoic sandstone and cherty dolostone. | High | 14 | 89.0% |
| Appalachian Plateau | Sandstone and shale. | Low | 8 | 11.0% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Claiborne County beside the ground around it
Claiborne County has more high-potential ground than Tennessee as a whole: 89.0% of its land against 47.2%. Of the 7 counties that border it, 4 have more high-potential ground, Grainger County the most at 100%.
The map rates the ground, not the air in any home.
Local help
Claiborne County, Local resources
Radon testing and mitigation in Claiborne County
- Tennessee Radon ProgramTennessee Radon Program, run by Department of Environment & Conservation, offers free or discounted test kits, and answers questions about testing and mitigation in Tennessee.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsThe program says:
The Tennessee Radon Program provides free radon test kits and information assistance to residents, while also providing training opportunities to radon professionals across the state.
- Compare kits
- Professionals in Tennessee1 professional is listed in Tennessee.
What Tennessee's program says
- Phone
- 1-800-232-1139
- TDEC.Radon@tn.gov
What it means
Claiborne County, Questions
Questions about radon in Claiborne County
Are radon levels high in Claiborne County?
In 2023, 50.0% of the radon tests reported to CDC for Claiborne County, Tennessee were at or above 4 pCi/L, and the median reported pre-mitigation result was 3.2 pCi/L. Of 80 Tennessee counties with 30 or more tests for the same period, 17 reported a higher share; pooled, the state comes to 33.3%.
Which counties border Claiborne County?
Claiborne County borders 7 counties: Union County, TN, Bell County, KY, Grainger County, TN, Hancock County, TN, Campbell County, TN, Whitley County, KY and Lee County, VA.
Products
Claiborne County, Products
Testing a home in Claiborne County
In Claiborne County, 44.0% of 125 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 33.3% pooled across Tennessee. In Zone 1 the year-round level in Claiborne 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
EcoQube Flex battery digital radon monitor with an e-ink screen
- C-NRPP 2024/25: Not included
- Battery
- Bluetooth
- Alarm
- Screen, app
Method: Ion chamber
First reading: Within 15 minutes
Short-term kit
PicoCan short-term charcoal canister radon test
- Lab fee included
Method: Charcoal
In home: 48 to 96 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Claiborne County is in EPA Zone 1, the highest predicted radon potential. Best radon monitors for Zone 1 counties like Claiborne County
Explore
Claiborne County, Bordering counties
Counties bordering Claiborne County
Calculated by Radon411- Radon levels in Campbell County, TNEPA zone 3
53.5%at or above 4 pCi/L
Median 4.5 pCi/L · 71 tests · 9.5 points above Claiborne County
- Radon levels in Lee County, VAEPA zone 1
50.0%at or above 4 pCi/L
Median 4.9 pCi/L · 14 tests · 6.0 points above Claiborne County
- Radon levels in Grainger County, TNEPA zone 1
48.2%at or above 4 pCi/L
Median 3.8 pCi/L · 56 tests · 4.2 points above Claiborne County
- Radon levels in Union County, TNEPA zone 1
37.7%at or above 4 pCi/L
Median 2.1 pCi/L · 53 tests · 6.3 points below Claiborne County
- Radon levels in Bell County, KYEPA zone 2
12.5%at or above 4 pCi/L
Median 1.3 pCi/L · 8 tests · 31.5 points below Claiborne County
- Radon levels in Hancock County, TNEPA zone 1
9.1%at or above 4 pCi/L
Median 1.8 pCi/L · 22 tests · 34.9 points below Claiborne County
- Radon levels in Whitley County, KYEPA zone 2
4.3%at or above 4 pCi/L
Median 1.6 pCi/L · 23 tests · 39.7 points below Claiborne County
Claiborne County, Cities and towns
Cities and towns in Claiborne County
The Census Bureau estimates 33,229 residents in Claiborne County for July 1, 2025, 1,154 more than in 2020 (+3.6%). That works out to 76 people per square mile of land. No town dominates: Harrogate, the largest, has 4,454 residents, 13.4% of the total. Together its 4 incorporated places hold 30.0% of those residents; the other 70.0% live outside any of them. CDC's 125 reported tests for 2008 to 2017 work out to 3.8 per 1,000 residents (2025 estimate), close to Tennessee's 4.2.
From Harrogate to Cumberland Gap, CDC publishes no figure by town: each reads Claiborne County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Harrogate | 4,454 | +1.3% | 13.4% |
| New Tazewell | 2,846 | +2.4% | 8.6% |
| Tazewell | 2,363 | +1.1% | 7.1% |
| Cumberland Gap | 312 | −1.0% | 0.9% |
4 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).
Claiborne County, Homes
Homes in Claiborne County
Of Claiborne County's 15,437 homes, 67% are detached houses, against 68% across Tennessee; 24% are mobile homes. Half of its homes were built before 1987, close to Tennessee's 1986: 14% date from before 1960 and 29% from 2000 or later. 72% of occupied homes are lived in by their owner (Tennessee: 67%); in the rest a tenant can run a test, but a fix is the landlord's to make.
| Homes | Claiborne County | Tennessee |
|---|---|---|
| Housing units | 15,437 | 3,095,472 |
| Detached houses | 67% | 68% |
| In buildings of 5 or more | 3% | 14% |
| Mobile homes | 24% | 8% |
| Built before 1960 | 14% | 18% |
| Built since 2000 | 29% | 29% |
| Middle year built | 1987 | 1986 |
| Owner-occupied | 72% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.