Short-term kit
Radon Short Term Test Kit short-term charcoal radon test kit, lab fee included
- Lab fee included
Method: Charcoal
In home: 2 to 7 days
Locations and reports
Radon Levels in Chester County, Tennessee
EPA puts Chester County in Zone 2, its middle 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
0.0%
33.3 pts below TN
- Chester
- 0.0%
- Tennessee
- 33.3%
44 tests, 2008 to 2017
Median result
1.1pCi/L
Below action level
- Chester
- 1.1 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
44
68th of 80 by tests
- Chester
- 44
- Davidson
- 5,592
Reported to CDC before any fix, 2008 to 2017
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
80 of 80
Lowest quarter
- Chester
- 0.0%
- Jefferson
- 56.8%
By share, of 80 with 30+ tests
Read a result for Chester County
Starts at Chester County's median, 1.1 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 1.1 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. Chester County's median reported result, 2008 to 2017.
The data
Chester County, At a glance
Chester County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Chester County is a
USGS geologic potential: Moderate across 55% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Chester 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 Chester 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).
Chester County, Compared
Chester County radon figures, compared
Calculated by Radon411Only 0 of 44 radon tests reported for Chester County over the 2008 to 2017 laboratory totals reached 4 pCi/L (0.0%). The median result, 1.1 pCi/L, sits below 2, well under EPA's 4 pCi/L action level, and the top reported result was 3.7 pCi/L.
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 44-test figure.
Across 95 Tennessee counties pooled together, 33.3% of tests reached that level, so Chester County runs 33.3 points below its state. Against the national pool of 35.7%, the gap is 35.7 points lower. Its place in the state: 80th of 80 Tennessee counties with 30 or more tests for the same period.
The reported tests do not follow EPA's Zone 2 label for Chester County (predicted average between 2 and 4 pCi/L): 0.0% of them reached 4 pCi/L, fewer than that label suggests. Of 4 neighbours with a figure, all 4 reported a larger share at or above 4 pCi/L; the spread is 7.9% (Hardin County) to 16.7% (Henderson County).
Below the action level, 35 tests (79.5%) came in under 2 pCi/L, against 42.4% statewide, and 9 tests (20.5%) fell between 2 and 4, against 24.3% statewide. USGS geology rates 55% of the county's land moderate radon potential.
The busiest year on file was 2022, with 6 tests reported; the quietest, 2023, had 1.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Chester County, Geology
The ground under Chester County
PredictedUSGS's geologic map splits Chester County: 54.9% of its land is moderate radon potential and 45.1% low. The map puts 54.9% of Chester County in the area it calls East Coastal Plain and 45.1% in Loess-Covered Coastal Plain. USGS gives the first a radon index of 9, 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 |
|---|---|---|---|---|
| East Coastal Plain | Cretaceous and younger marine and fluvial sand, clay, and marl. | Moderate | 9 | 54.9% |
| Loess-Covered Coastal Plain | Cretaceous and younger marine and fluvial sand, clay, and marl covered with loess. | Low | 8 | 45.1% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Chester County beside the ground around it
Across Tennessee 47.2% of the land is rated high; none of Chester County's is. Of the 5 counties that border it, 1 has more high-potential ground, Hardin County the most at 42.7%.
The map rates the ground, not the air in any home.
Local help
Chester County, Local resources
Radon testing and mitigation in Chester 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
Chester County, Questions
Questions about radon in Chester County
Are radon levels high in Chester County?
In 2023, 0.0% of the radon tests reported to CDC for Chester County, Tennessee were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.2 pCi/L. Of 80 Tennessee counties with 30 or more tests for the same period, 79 reported a higher share; pooled, the state comes to 33.3%.
Which counties border Chester County?
Chester County borders 5 counties: McNairy County, Madison County, Henderson County, Hardeman County and Hardin County.
Products
Chester County, Products
Testing a home in Chester County
In Chester County, 0.0% of 44 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 33.3% pooled across Tennessee. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Chester County; a long-term test tells the year-round average.
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
Monitor
EcoBlu plug-in digital radon monitor with a display
- C-NRPP 2024/25: Not included
- Plug-in
- Alarm
- Screen
Method: Ion chamber
First reading: Within 10 minutes
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Chester County, Bordering counties
Counties bordering Chester County
Calculated by Radon411- Radon levels in Hardeman CountyEPA zone 3
20.0%at or above 4 pCi/L
Median 1.6 pCi/L · 5 tests · 20.0 points above Chester County
- Radon levels in Henderson CountyEPA zone 2
16.7%at or above 4 pCi/L
Median 1.6 pCi/L · 30 tests · 16.7 points above Chester County
- Radon levels in Madison CountyEPA zone 1
8.7%at or above 4 pCi/L
Median 1.2 pCi/L · 92 tests · 8.7 points above Chester County
- Radon levels in McNairy CountyEPA zone 2
8.5%at or above 4 pCi/L
Median 1.0 pCi/L · 59 tests · 8.5 points above Chester County
- Radon levels in Hardin CountyEPA zone 2
7.9%at or above 4 pCi/L
Median 1.0 pCi/L · 38 tests · 7.9 points above Chester County
Chester County, Cities and towns
Cities and towns in Chester County
The Census Bureau estimates 17,994 residents in Chester County for July 1, 2025, 615 more than in 2020 (+3.5%). That works out to 63 people per square mile of land. Its largest town, Henderson, has 6,590 residents, 36.6% of the total. Reported testing is thin here: 44 tests over 2008 to 2017, or 2.4 for every 1,000 residents (2025 estimate), where Tennessee as a whole comes to 4.2.
From Henderson to Silerton, CDC publishes no figure by town: each reads Chester County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Henderson | 6,590 | +4.0% | 36.6% |
| Milledgevilleextends beyond Chester County | 275 | +1.9% | Counted whole |
| Envilleextends beyond Chester County | 189 | +2.2% | Counted whole |
| Silertonextends beyond Chester County | 100 | −1.0% | Counted whole |
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). A place that extends beyond Chester County is counted whole, so it has no share.
Chester County, Homes
Homes in Chester County
Chester County is a place of houses on their own lots: 78% of its 7,251 homes are detached single-family houses, against 68% across Tennessee. Half of its homes were built before 1989, close to Tennessee's 1986: 17% date from before 1960 and 28% from 2000 or later. Owners live in 77% of the occupied homes (Tennessee: 67%), so for most households a test and a fix are their own to order.
| Homes | Chester County | Tennessee |
|---|---|---|
| Housing units | 7,251 | 3,095,472 |
| Detached houses | 78% | 68% |
| In buildings of 5 or more | 2% | 14% |
| Mobile homes | 16% | 8% |
| Built before 1960 | 17% | 18% |
| Built since 2000 | 28% | 29% |
| Middle year built | 1989 | 1986 |
| Owner-occupied | 77% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.