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 Hickman County, Tennessee
EPA puts Hickman County in Zone 1, its highest radon zone, and only 3 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
35.0%
1.7 pts above TN
- Hickman
- 35.0%
- Tennessee
- 33.3%
120 tests, 2008 to 2017
Median result
2.2pCi/L
Below action level
- Hickman
- 2.2 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
120
43rd of 80 by tests
- Hickman
- 120
- 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
30 of 80
Middle half
- Hickman
- 35.0%
- Jefferson
- 56.8%
By share, of 80 with 30+ tests
Read a result for Hickman County
Starts at Hickman County's median, 2.2 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 2.2 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. Hickman County's median reported result, 2008 to 2017.
The data
Hickman County, At a glance
Hickman County at a glance
Predicted: EPA radon zone
EPA Zone 1: highest predicted potential
EPA puts all of Hickman County in
USGS geologic potential: High across 79% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Hickman County, 2023
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2022 | 25.0% |
| 2023 | 33.3% |
2023: 33.3%. Across these years the share ran from 25.0% to 33.3%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
Only 3 tests were reported to CDC for Hickman 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).
Hickman County, Compared
Hickman County radon figures, compared
Calculated by Radon411In Hickman County, about 4 in 10 reported tests over the 2008 to 2017 laboratory totals (42 of 120) were at or above EPA's action level. Against the national pool of 35.7%, the gap is 0.7 points lower. Across 95 Tennessee counties pooled together, 33.3% of tests reached that level, so Hickman County runs 1.7 points above its state.
The newest figure, in 2023, counts only 3 tests (33.3% at or above 4 pCi/L), too few to compare, so this reading uses the 120-test figure.
Of 6 neighbours with a figure, 1 reported a larger share at or above 4 pCi/L and 5 a smaller one; the spread is 16.1% (Lewis County) to 39.3% (Maury County). By share, Hickman County is 30th of 80 Tennessee counties with 30 or more tests for the same period.
Half the tests came in under 2.2 pCi/L and half over it; the single highest reached 29.9 pCi/L. Below the action level, 57 tests (47.5%) came in under 2 pCi/L, against 42.4% statewide, and 21 tests (17.5%) fell between 2 and 4, against 24.3% statewide.
Zone 1 on EPA's map (predicted average above 4 pCi/L) and a 35.0% share point the same way here. USGS geology rates 79% of the county's land high radon potential.
The busiest year on file was 2022, with 12 tests reported; the quietest, 2023, had 3.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Hickman County, Geology
The ground under Hickman County
PredictedMost of the ground under Hickman County is one class on USGS's geologic map: 78.8% of its land is high radon potential, with 21.2% moderate. The map puts 51.2% of Hickman County in the area it calls Cherty Highland and 27.6% in Nashville Basin, with one smaller area beside them. USGS gives the first a radon index of 12 and the second 14, both in the high band (12 to 17).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Cherty Highland | Cherty dolostone. | High | 12 | 51.2% |
| Nashville Basin | Mississippian Limestone. | High | 14 | 27.6% |
| Highland Rim | Paleozoic sedimentary rocks (limestone, shale, chert, and dolostone). | Moderate | 11 | 21.2% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Hickman County beside the ground around it
Hickman County has more high-potential ground than Tennessee as a whole: 78.8% of its land against 47.2%. Of the 6 counties that border it, 4 have more high-potential ground, Perry County the most at 100%.
The map rates the ground, not the air in any home.
Local help
Hickman County, Local resources
Radon testing and mitigation in Hickman 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
Hickman County, Questions
Questions about radon in Hickman County
Are radon levels high in Hickman County?
In 2023, 33.3% of the radon tests reported to CDC for Hickman County, Tennessee were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.1 pCi/L. Of 80 Tennessee counties with 30 or more tests for the same period, 29 reported a higher share; pooled, the state comes to 33.3%.
Which counties border Hickman County?
Hickman County borders 6 counties: Lewis County, Humphreys County, Perry County, Maury County, Dickson County and Williamson County.
Products
Hickman County, Products
Testing a home in Hickman County
In Hickman County, 35.0% of 120 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 Hickman 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
Wave Plus battery radon and air quality monitor
- C-NRPP 2024/25: Not included
- Battery
- Bluetooth
- App only
Method: Alpha spectrometry
Short-term kitempowerDX
Standard Radon Test short-term mail-in radon test kit
- Lab fee included
Method: Passive sampler
In home: 48 to 96 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Hickman County is in EPA Zone 1, the highest predicted radon potential. Best radon monitors for Zone 1 counties like Hickman County
Explore
Hickman County, Bordering counties
Counties bordering Hickman County
Calculated by Radon411- Radon levels in Maury CountyEPA zone 3
39.3%at or above 4 pCi/L
Median 3.0 pCi/L · 509 tests · 4.3 points above Hickman County
- Radon levels in Perry CountyEPA zone 1
32.5%at or above 4 pCi/L
Median 2.0 pCi/L · 40 tests · 2.5 points below Hickman County
- Radon levels in Dickson CountyEPA zone 2
26.3%at or above 4 pCi/L
Median 2.1 pCi/L · 209 tests · 8.7 points below Hickman County
- Radon levels in Williamson CountyEPA zone 1
25.8%at or above 4 pCi/L
Median 2.0 pCi/L · 3,414 tests · 9.2 points below Hickman County
- Radon levels in Humphreys CountyEPA zone 1
23.8%at or above 4 pCi/L
Median 2.0 pCi/L · 105 tests · 11.2 points below Hickman County
- Radon levels in Lewis CountyEPA zone 1
16.1%at or above 4 pCi/L
Median 1.4 pCi/L · 56 tests · 18.9 points below Hickman County
Hickman County, Cities and towns
Cities and towns in Hickman County
The Census Bureau estimates 26,219 residents in Hickman County for July 1, 2025, 1,247 more than in 2020 (+5.0%). That works out to 43 people per square mile of land. Centerville, its one incorporated place, has 3,589 residents, 13.7% of the total. CDC's 120 reported tests for 2008 to 2017 work out to 4.6 per 1,000 residents (2025 estimate), close to Tennessee's 4.2.
Centerville is the one incorporated place here; CDC publishes no figure by town, so it reads Hickman County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Centerville | 3,589 | +1.8% | 13.7% |
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).
Hickman County, Homes
Homes in Hickman County
Of Hickman County's 10,588 homes, 73% are detached houses, against 68% across Tennessee; 24% are mobile homes. Half of its homes were built before 1988, close to Tennessee's 1986: 15% date from before 1960 and 27% 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 | Hickman County | Tennessee |
|---|---|---|
| Housing units | 10,588 | 3,095,472 |
| Detached houses | 73% | 68% |
| In buildings of 5 or more | 2% | 14% |
| Mobile homes | 24% | 8% |
| Built before 1960 | 15% | 18% |
| Built since 2000 | 27% | 29% |
| Middle year built | 1988 | 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.