Short-term kitKidde
442020 short-term charcoal radon test kit
- Lab fee included
Method: Charcoal
In home: 3 days
Locations and reports
Radon Levels in Overton County, Tennessee
EPA puts Overton County in Zone 2, its middle radon zone, and only 5 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
44.7%
11.3 pts above TN
- Overton
- 44.7%
- Tennessee
- 33.4%
141 tests, 2007 to 2016
Median result
3.2pCi/L
Below action level
- Overton
- 3.2 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2007 to 2016
Tests reported
141
32nd of 77 by tests
- Overton
- 141
- Davidson
- 5,151
Reported to CDC before any fix, 2007 to 2016
EPA radon zone
Zone 2
Moderate potential
- 1
- Zone 2
- 3
1 highest, 3 lowest
EPA predicts 2 to 4 pCi/L indoors
Rank in Tennessee
18 of 77
Top quarter
- Overton
- 44.7%
- Jefferson
- 58.6%
By share, of 77 with 30+ tests
Read a result for Overton County
Starts at Overton County's median, 3.2 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 3.2 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. Overton County's median reported result, 2007 to 2016.
The data
Overton County, At a glance
Overton County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Overton County is a
USGS geologic potential: Moderate across 87% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Overton County, 2023
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2022 | 13.2% |
| 2023 | 40.0% |
2023: 40.0%. Across these years the share ran from 13.2% to 40.0%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
Only 5 tests were reported to CDC for Overton 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).
Overton County, Compared
Overton County radon figures, compared
Calculated by Radon411In Overton County, about 4 in 10 reported tests over the 2007 to 2016 laboratory totals (63 of 141) were at or above EPA's action level. Against the national pool of 35.8%, the gap is 8.9 points higher. Across 95 Tennessee counties pooled together, 33.4% of tests reached that level, so Overton County runs 11.3 points above its state.
The newest figure, in 2023, counts only 5 tests (40.0% at or above 4 pCi/L), too few to compare, so this reading uses the 141-test figure.
Of 4 neighbours with a figure, 1 reported a larger share at or above 4 pCi/L and 3 a smaller one; the spread is 30.4% (Clay County) to 45.3% (Jackson County). By share, Overton County is 18th of 77 Tennessee counties with 30 or more tests for the same period.
Half the tests came in under 3.2 pCi/L and half over it; the single highest reached 71.0 pCi/L. Below the action level, 49 tests (34.8%) came in under 2 pCi/L, against 42.3% statewide, and 29 tests (20.6%) fell between 2 and 4, against 24.3% statewide.
Zone 2 on EPA's map (predicted average between 2 and 4 pCi/L) and a 44.7% share point the same way here. USGS geology rates 87% of the county's land moderate radon potential. CDC also counts 6 tests taken after mitigation in Overton County for the same period: tests in homes where a fix was already in.
The busiest year on file was 2022, with 114 tests reported; the quietest, 2023, had 5.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Overton County, Geology
The ground under Overton County
PredictedMost of the ground under Overton County is one class on USGS's geologic map: 87.3% of its land is moderate radon potential, with 3.2% high and 9.5% low. The map puts 87.3% of Overton County in the area it calls Highland Rim and 9.5% in Appalachian Plateau, 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 8, in the low band (5 to 8).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Highland Rim | Paleozoic sedimentary rocks (limestone, shale, chert, and dolostone). | Moderate | 11 | 87.3% |
| Appalachian Plateau | Sandstone and shale. | Low | 8 | 9.5% |
| Eastern Pennyroyal | Marine shale, sandstone and limestone. | High | 12 | 3.2% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Overton County beside the ground around it
Tennessee as a whole has more high-potential ground than Overton County: 47.2% of its land, against 3.2% here. Of the 5 counties that border it, 3 have more high-potential ground, Jackson County the most at 81.9%.
The map rates the ground, not the air in any home.
Local help
Overton County, Local resources
Radon testing and mitigation in Overton 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
Overton County, Questions
Questions about radon in Overton County
Are radon levels high in Overton County?
In 2023, 40.0% of the radon tests reported to CDC for Overton County, Tennessee were at or above 4 pCi/L, and the median reported pre-mitigation result was 0.7 pCi/L. Of 77 Tennessee counties with 30 or more tests for the same period, 17 reported a higher share; pooled, the state comes to 33.4%.
Which counties border Overton County?
Overton County borders 5 counties: Pickett County, Clay County, Putnam County, Jackson County and Fentress County.
Products
Overton County, Products
Testing a home in Overton County
In Overton County, 44.7% of 141 tests reported to CDC over the 2007 to 2016 laboratory totals reached 4 pCi/L, against 33.4% pooled across Tennessee. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Overton 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
View Radon Wi-Fi radon monitor with an e-paper display
- C-NRPP 2024/25: Approved
- Battery
- Wi-Fi, Bluetooth
- Screen, app
Method: Alpha spectrometry
Readings: Every 60 minutes
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Overton County, Bordering counties
Counties bordering Overton County
Calculated by Radon411- Radon levels in Jackson CountyEPA zone 1
45.3%at or above 4 pCi/L
Median 3.7 pCi/L · 53 tests · 0.6 points above Overton County
- Radon levels in Pickett CountyEPA zone 2
40.5%at or above 4 pCi/L
Median 3.4 pCi/L · 42 tests · 4.2 points below Overton County
- Radon levels in Putnam CountyEPA zone 2
36.6%at or above 4 pCi/L
Median 2.7 pCi/L · 309 tests · 8.1 points below Overton County
- Radon levels in Clay CountyEPA zone 2
30.4%at or above 4 pCi/L
Median 2.2 pCi/L · 46 tests · 14.3 points below Overton County
- Radon levels in Fentress CountyEPA zone 2
12.0%at or above 4 pCi/L
Median 1.3 pCi/L · 25 tests · 32.7 points below Overton County
Overton County, Cities and towns
Cities and towns in Overton County
Overton County is growing: the Census Bureau puts it at 23,787 residents on July 1, 2025, up 5.3% from 22,590 in 2020. That works out to 55 people per square mile of land. Livingston, its one incorporated place, has 4,147 residents, 17.4% of the total. Testing is reported here more often than across the state: CDC's 141 reported tests for 2007 to 2016 come to 5.9 for every 1,000 residents (2025 estimate), against 4.0 for Tennessee.
Livingston is the one incorporated place here; CDC publishes no figure by town, so it reads Overton County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Livingston | 4,147 | +5.8% | 17.4% |
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).
Overton County, Homes
Homes in Overton County
Overton County is a place of houses on their own lots: 77% of its 10,368 homes are detached single-family houses, against 68% across Tennessee. Half of its homes were built before 1982, close to Tennessee's 1986: 19% date from before 1960 and 24% from 2000 or later. Owners live in 78% of the occupied homes (Tennessee: 67%), so for most households a test and a fix are their own to order.
| Homes | Overton County | Tennessee |
|---|---|---|
| Housing units | 10,368 | 3,095,472 |
| Detached houses | 77% | 68% |
| In buildings of 5 or more | 1% | 14% |
| Mobile homes | 20% | 8% |
| Built before 1960 | 19% | 18% |
| Built since 2000 | 24% | 29% |
| Middle year built | 1982 | 1986 |
| Owner-occupied | 78% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.