Short-term kit
RA100 short-term liquid scintillation radon test kit
- Lab fee extra
Method: Liquid scintillation
In home: 48 to 96 hours
Locations and reports
Radon Levels in Hardeman County, Tennessee
EPA puts Hardeman County in Zone 3, its lowest radon zone, and only 5 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
11.1%
Fayette County
- Fayette
- 11.1%
- Chester
- 0.0%
4 of 8 neighbours have 30+ tests, 2008 to 2017
Nearest county
11.1%
Fayette County, 24 miles
- Fayette
- 11.1%
- Tennessee
- 33.3%
Share at 4+ pCi/L, 99 tests, 2008 to 2017
Ground above low
8.8%
60.7 pts below Tennessee
- Hardeman
- 8.8%
- Tennessee
- 69.5%
Share of land USGS rates moderate or high potential
Tests reported
6
Too few for a share
- Hardeman
- 6
- Needed
- 30
2007 to 2016, laboratory
EPA radon zone
Zone 3
Lower potential
- 1
- 2
- Zone 3
1 highest, 3 lowest
EPA predicts under 2 pCi/L indoors
Read a result for Hardeman 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
Hardeman County, At a glance
Hardeman County at a glance
Predicted: EPA radon zone
EPA Zone 3: lower predicted potential
USGS geologic potential: Low across 91% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Hardeman County, 2008 to 2017, laboratory
CDC holds 5 reported tests for Hardeman County over the 2008 to 2017 laboratory totals, with a median of 1.6 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Hardeman County beside the counties around it is how this page reads it.
What these figures count
Only 5 tests were reported to CDC for Hardeman 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).
Hardeman County, Compared
Hardeman County radon figures, compared
Calculated by Radon411CDC's largest figure for Hardeman County rests on 6 tests over the 2007 to 2016 laboratory totals, 1 of them at or above 4 pCi/L, so each test moves its share by 16.7 points and no rank or comparison is drawn from it. Results reached as high as 13.1 pCi/L, with a middle value of 1.5 pCi/L.
Of the counties bordering it, 4 have a figure over the 2008 to 2017 laboratory totals: Fayette County reported the largest share at or above 4 pCi/L, 11.1%, and Chester County the smallest, 0.0%, with Madison County at 8.7% and McNairy County at 8.5% between. Farther out, Hardin County (46 miles away) at 7.9%, Henderson County (46 miles away) at 16.7% and Tipton County (48 miles away) at 4.5% have figures too. Pooled across 95 Tennessee counties, 33.3% of reported tests reached that level; across every county in the country with a figure, 35.7%.
Statewide for the same period, Jefferson County reported the highest share (56.8%) and Chester County the lowest (0.0%). EPA's 1993 map puts Hardeman County in Zone 3, its lowest label: a predicted county average under 2 pCi/L. USGS geology rates 91% of the county's land low radon potential.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Hardeman County, Geology
The ground under Hardeman County
PredictedMost of the ground under Hardeman County is one class on USGS's geologic map: 91.2% of its land is low radon potential, with 8.8% moderate. The map puts 90.9% of Hardeman County in the area it calls Loess-Covered Coastal Plain and 8.8% in East Coastal Plain. USGS gives the first a radon index of 8, in the low band (5 to 8), and the second 9, in the moderate band (9 to 11).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Loess-Covered Coastal Plain | Cretaceous and younger marine and fluvial sand, clay, and marl covered with loess. | Low | 8 | 90.9% |
| East Coastal Plain | Cretaceous and younger marine and fluvial sand, clay, and marl. | Moderate | 9 | 8.8% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Hardeman County beside the ground around it
Across Tennessee 47.2% of the land is rated high; none of Hardeman County's is. Of the 8 counties that border it, 4 have more moderate-potential ground, Alcorn County, MS the most at 99.8%.
The map rates the ground, not the air in any home.
Local help
Hardeman County, Local resources
Radon testing and mitigation in Hardeman 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
Hardeman County, Questions
Questions about radon in Hardeman County
Are radon levels high in Hardeman County?
Over the 2008 to 2017 laboratory totals, 20.0% of the radon tests reported to CDC for Hardeman County, Tennessee were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.6 pCi/L. Of the counties bordering it, 4 have a figure over the 2008 to 2017 laboratory totals: Fayette County reported the largest share at or above 4 pCi/L, 11.1%, and Chester County the smallest, 0.0%, with Madison County at 8.7% and McNairy County at 8.5% between.
Which counties border Hardeman County?
Hardeman County borders 8 counties: McNairy County, TN, Tippah County, MS, Fayette County, TN, Alcorn County, MS, Chester County, TN, Benton County, MS, Madison County, TN and Haywood County, TN.
Products
Hardeman County, Products
Testing a home in Hardeman County
No CDC figure names Hardeman County; the nearest county with one, Fayette County (24 miles away), reported 11.1% 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. 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 Hardeman 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
MonitorForensics Detectors
FD-65-RADON rechargeable radon detector with a color screen
- 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
Hardeman County, Bordering counties
Counties bordering Hardeman County
Calculated by Radon411- Radon levels in Fayette County, TNEPA zone 3
11.1%at or above 4 pCi/L
Median 1.1 pCi/L · 99 tests
- Radon levels in Madison County, TNEPA zone 1
8.7%at or above 4 pCi/L
Median 1.2 pCi/L · 92 tests
- Radon levels in McNairy County, TNEPA zone 2
8.5%at or above 4 pCi/L
Median 1.0 pCi/L · 59 tests
- Radon levels in Chester County, TNEPA zone 2
0.0%at or above 4 pCi/L
Median 1.1 pCi/L · 44 tests
- Radon levels in Haywood County, TNEPA zone 3
0.0%at or above 4 pCi/L
Median 0.7 pCi/L · 23 tests
- Radon levels in Tippah County, MSEPA zone 3
No CDC figure for 2008 to 2017; its page reads it against its own neighbours.
- Radon levels in Alcorn County, MSEPA zone 2
No CDC figure for 2008 to 2017; its page reads it against its own neighbours.
- Radon levels in Benton County, MSEPA zone 3
No CDC figure for 2008 to 2017; its page reads it against its own neighbours.
Hardeman County, Cities and towns
Cities and towns in Hardeman County
About 25,274 people live in Hardeman County by the Census Bureau's estimate for July 1, 2025, 161 fewer than in 2020 (−0.6%). That works out to 38 people per square mile of land. No town dominates: Bolivar, the largest, has 5,043 residents, 20.0% of the total. Reported testing is thin here: 6 tests over 2007 to 2016, or 0.2 for every 1,000 residents (2025 estimate), where Tennessee as a whole comes to 4.0.
From Bolivar to Hickory Valley, CDC publishes no figure by town: each reads Hardeman County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Bolivar | 5,043 | −2.8% | 20.0% |
| Whiteville | 4,482 | −2.2% | 17.7% |
| Middleton | 731 | +11.8% | 2.9% |
| Grand Junctionextends beyond Hardeman County | 323 | −3.0% | Counted whole |
| Toone | 264 | +0.4% | 1.0% |
| Hornsby | 258 | −1.1% | 1.0% |
| Saulsbury | 113 | +1.8% | 0.4% |
| Silertonextends beyond Hardeman County | 100 | −1.0% | Counted whole |
| Hickory Valley | 80 | +1.3% | 0.3% |
9 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). A place that extends beyond Hardeman County is counted whole, so it has no share.
Hardeman County, Homes
Homes in Hardeman County
Hardeman County is a place of houses on their own lots: 75% of its 10,708 homes are detached single-family houses, against 68% across Tennessee. Half of its homes were built before 1982, close to Tennessee's 1986: 20% date from before 1960 and 17% from 2000 or later. 71% 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 | Hardeman County | Tennessee |
|---|---|---|
| Housing units | 10,708 | 3,095,472 |
| Detached houses | 75% | 68% |
| In buildings of 5 or more | 1% | 14% |
| Mobile homes | 20% | 8% |
| Built before 1960 | 20% | 18% |
| Built since 2000 | 17% | 29% |
| Middle year built | 1982 | 1986 |
| Owner-occupied | 71% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.