Short-term kit
Air Chek Short-Term radon test kit you hang, lab fee included
- Lab fee included
In home: 72 to 168 hours
Locations and reports
Radon Levels in Sequatchie County, Tennessee
EPA puts Sequatchie County in Zone 3, its lowest radon zone, and only 1 radon test from it is 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
20.7%
12.6 pts below TN
- Sequatchie
- 20.7%
- Tennessee
- 33.3%
58 tests, 2008 to 2017
Median result
1.9pCi/L
Below action level
- Sequatchie
- 1.9 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
58
56th of 80 by tests
- Sequatchie
- 58
- Davidson
- 5,592
Reported to CDC before any fix, 2008 to 2017
EPA radon zone
Zone 3
Lower potential
- 1
- 2
- Zone 3
1 highest, 3 lowest
EPA predicts under 2 pCi/L indoors
Rank in Tennessee
57 of 80
Middle half
- Sequatchie
- 20.7%
- Jefferson
- 56.8%
By share, of 80 with 30+ tests
Read a result for Sequatchie County
Starts at Sequatchie County's median, 1.9 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 1.9 pCi/L
Below 2 pCi/L
- Under 20 to 1.9 pCi/L
- 2 to 4consider a fix
- 4 and aboveEPA says fix it
This result is below 2 pCi/L, the level at which EPA says a fix should be considered. Sequatchie County's median reported result, 2008 to 2017.
The data
Sequatchie County, At a glance
Sequatchie County at a glance
Predicted: EPA radon zone
EPA Zone 3: lower predicted potential
USGS geologic potential: Low across 100% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Sequatchie County, 2023
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2022 | 0.0% |
| 2023 | 0.0% |
2023: 0.0%. Across these years the share ran from 0.0% to 0.0%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
Only 1 test was reported to CDC for Sequatchie 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).
Sequatchie County, Compared
Sequatchie County radon figures, compared
Calculated by Radon411Sequatchie County's 58 reported tests over the 2008 to 2017 laboratory totals had a middle value of 1.9 pCi/L and a maximum of 23.1 pCi/L, and 20.7% reached 4 pCi/L. Tennessee as a whole (95 Tennessee counties, pooled) comes to 33.3%: 12.6 points higher than here.
The newest figure, in 2023, counts only 1 test (0.0% at or above 4 pCi/L), too few to compare, so this reading uses the 58-test figure.
Among its state's counties it ranks 57th of 80 Tennessee counties with 30 or more tests for the same period. Statewide for the same period, Jefferson County reported the highest share (56.8%) and Chester County the lowest (0.0%).
Below the action level, 30 tests (51.7%) came in under 2 pCi/L, against 42.4% statewide, and 16 tests (27.6%) fell between 2 and 4, against 24.3% statewide. The busiest year on file was 2022, with 15 tests reported; the quietest, 2023, had 1.
EPA's 1993 zone map puts Sequatchie County in Zone 3, a predicted county average under 2 pCi/L. USGS geology rates 100% of the county's land low radon potential.
Next door, the shares run from 19.3% in Hamilton County to 36.9% in Warren County, with Hamilton County below Sequatchie County.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Sequatchie County, Geology
The ground under Sequatchie County
PredictedUSGS's geologic map puts all of Sequatchie County's mapped land in one class: low radon potential. All of it lies in the area the map calls Appalachian Plateau, to which USGS gives a radon index of 8, in the low band (5 to 8).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Appalachian Plateau | Sandstone and shale. | Low | 8 | 100% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Sequatchie County beside the ground around it
Across Tennessee 47.2% of the land is rated high; none of Sequatchie County's is. Of the 6 counties that border it, 3 have more high-potential ground, Hamilton County the most at 79.6%.
The map rates the ground, not the air in any home.
Local help
Sequatchie County, Local resources
Radon testing and mitigation in Sequatchie 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
Sequatchie County, Questions
Questions about radon in Sequatchie County
Are radon levels high in Sequatchie County?
In 2023, 0.0% of the radon tests reported to CDC for Sequatchie County, Tennessee were at or above 4 pCi/L, and the median reported pre-mitigation result was 0.8 pCi/L. Of 80 Tennessee counties with 30 or more tests for the same period, 56 reported a higher share; pooled, the state comes to 33.3%.
Which counties border Sequatchie County?
Sequatchie County borders 6 counties: Bledsoe County, Hamilton County, Grundy County, Marion County, Van Buren County and Warren County.
Products
Sequatchie County, Products
Testing a home in Sequatchie County
In Sequatchie County, 20.7% of 58 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 33.3% pooled across Tennessee. Zone 3 is the lowest label, yet homes at or above 4 pCi/L occur in every zone: a short-term kit (2 to 90 days) is the quick first check in Sequatchie County.
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
MonitorX-Sense
XR0A-iR Wi-Fi battery radon detector with a screen
- C-NRPP 2024/25: Not included
- Battery
- Wi-Fi
- Screen, app
Method: Alpha spectrometry
First reading: Within 24 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Sequatchie County, Bordering counties
Counties bordering Sequatchie County
Calculated by Radon411- Radon levels in Van Buren CountyEPA zone 2
40.9%at or above 4 pCi/L
Median 2.1 pCi/L · 22 tests · 20.2 points above Sequatchie County
- Radon levels in Warren CountyEPA zone 2
36.9%at or above 4 pCi/L
Median 3.0 pCi/L · 149 tests · 16.2 points above Sequatchie County
- Radon levels in Marion CountyEPA zone 2
28.4%at or above 4 pCi/L
Median 1.6 pCi/L · 74 tests · 7.7 points above Sequatchie County
- Radon levels in Bledsoe CountyEPA zone 3
24.3%at or above 4 pCi/L
Median 2.1 pCi/L · 37 tests · 3.6 points above Sequatchie County
- Radon levels in Hamilton CountyEPA zone 2
19.3%at or above 4 pCi/L
Median 1.7 pCi/L · 1,148 tests · 1.4 points below Sequatchie County
- Radon levels in Grundy CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 1.0 pCi/L · 29 tests · 20.7 points below Sequatchie County
Sequatchie County, Cities and towns
Cities and towns in Sequatchie County
Sequatchie County is growing: the Census Bureau puts it at 17,861 residents on July 1, 2025, up 12.7% from 15,848 in 2020. That works out to 67 people per square mile of land. Dunlap, its one incorporated place, has 6,089 residents, 34.1% of the total. CDC's 58 reported tests for 2008 to 2017 work out to 3.2 per 1,000 residents (2025 estimate), close to Tennessee's 4.2.
Dunlap is the one incorporated place here; CDC publishes no figure by town, so it reads Sequatchie County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Dunlap | 6,089 | +13.6% | 34.1% |
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).
Sequatchie County, Homes
Homes in Sequatchie County
Of Sequatchie County's 6,951 homes, 70% are detached houses, against 68% across Tennessee; 23% are mobile homes. Half of its homes were built before 1993, close to Tennessee's 1986: 13% date from before 1960 and 37% from 2000 or later. 75% 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 | Sequatchie County | Tennessee |
|---|---|---|
| Housing units | 6,951 | 3,095,472 |
| Detached houses | 70% | 68% |
| In buildings of 5 or more | 2% | 14% |
| Mobile homes | 23% | 8% |
| Built before 1960 | 13% | 18% |
| Built since 2000 | 37% | 29% |
| Middle year built | 1993 | 1986 |
| Owner-occupied | 75% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.