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 Gibson County, Tennessee
EPA puts Gibson County in Zone 3, its lowest radon zone, and only 12 radon tests from it are on file with CDC (2022). Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Share at 4+ pCi/L
5.3%
28.0 pts below TN
- Gibson
- 5.3%
- Tennessee
- 33.3%
57 tests, 2008 to 2017
Median result
1.0pCi/L
Below action level
- Gibson
- 1.0 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
57
57th of 80 by tests
- Gibson
- 57
- 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
77 of 80
Lowest quarter
- Gibson
- 5.3%
- Jefferson
- 56.8%
By share, of 80 with 30+ tests
Read a result for Gibson County
Starts at Gibson County's median, 1.0 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 1.0 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. Gibson County's median reported result, 2008 to 2017.
The data
Gibson County, At a glance
Gibson 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 Gibson County, 2022
Median reported resultHighest reported result
0.8 pCi/L1.7 pCi/L
| Year | Median reported result | Highest reported result | Share of tests at or above 4 pCi/L |
|---|---|---|---|
| 2022 | 0.8 pCi/L | 1.7 pCi/L | 0.0% |
| 2023 | No data | No data | No data |
What these figures count
Only 12 tests were reported to CDC for Gibson County over 2022, 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: 2022. Measured data period: 2005 to 2023 (every CDC figure on file).
Gibson County, Compared
Gibson County radon figures, compared
Calculated by Radon411Gibson County reports fewer high tests than Tennessee overall. 5.3% of its 57 tests over the 2008 to 2017 laboratory totals were at or above 4 pCi/L. That is 28.0 points below the 33.3% pooled from 95 Tennessee counties.
The newest figure, in 2022, counts only 12 tests (0.0% at or above 4 pCi/L), too few to compare, so this reading uses the 57-test figure.
Ordered from highest share down, it comes 77th of 80 Tennessee counties with 30 or more tests for the same period. Nationally, every county with a figure for the same period pools to 35.7%; Gibson County sits 30.4 points below it.
Next door, the shares run from 8.7% in Madison County to 11.1% in Obion County. Zone 3 on EPA's map (predicted average under 2 pCi/L) and a 5.3% share point the same way here.
Half the tests came in under 1.0 pCi/L and half over it; the single highest reached 10.4 pCi/L. The rest split 75.4% under 2 pCi/L and 19.3% from 2 to 4 (Tennessee: 42.4% and 24.3%).
CDC's ten-year totals for Gibson County went from 44 tests (2005 to 2014) to 57 (2008 to 2017), the share going from 2.3% to 5.3%.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Gibson County, Geology
The ground under Gibson County
PredictedUSGS's geologic map puts all of Gibson County's mapped land in one class: low radon potential. All of it lies in the area the map calls Loess-Covered Coastal Plain, 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 |
|---|---|---|---|---|
| Loess-Covered Coastal Plain | Cretaceous and younger marine and fluvial sand, clay, and marl covered with loess. | 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.
Gibson County beside the ground around it
Across Tennessee 47.2% of the land is rated high; none of Gibson County's is. Of the 6 counties that border it, 1 has more moderate-potential ground, Carroll County the most at 25.1%.
The map rates the ground, not the air in any home.
Local help
Gibson County, Local resources
Radon testing and mitigation in Gibson 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
Gibson County, Questions
Questions about radon in Gibson County
Are radon levels high in Gibson County?
In 2022, 0.0% of the radon tests reported to CDC for Gibson 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, 76 reported a higher share; pooled, the state comes to 33.3%.
Which counties border Gibson County?
Gibson County borders 6 counties: Crockett County, Weakley County, Madison County, Carroll County, Dyer County and Obion County.
Products
Gibson County, Products
Testing a home in Gibson County
In Gibson County, 5.3% of 57 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 Gibson 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
Monitor
RadonScan USB-powered radon monitor with a color screen
- C-NRPP 2024/25: Not included
- Plug-in
- Alarm
- Screen
First reading: Within 5 minutes
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Gibson County, Bordering counties
Counties bordering Gibson County
Calculated by Radon411- Radon levels in Crockett CountyEPA zone 3
21.1%at or above 4 pCi/L
Median 1.2 pCi/L · 19 tests · 15.8 points above Gibson County
- Radon levels in Carroll CountyEPA zone 3
20.0%at or above 4 pCi/L
Median 1.0 pCi/L · 25 tests · 14.7 points above Gibson County
- Radon levels in Weakley CountyEPA zone 3
12.5%at or above 4 pCi/L
Median 1.1 pCi/L · 16 tests · 7.2 points above Gibson County
- Radon levels in Obion CountyEPA zone 3
11.1%at or above 4 pCi/L
Median 1.8 pCi/L · 36 tests · 5.8 points above Gibson County
- Radon levels in Madison CountyEPA zone 1
8.7%at or above 4 pCi/L
Median 1.2 pCi/L · 92 tests · 3.4 points above Gibson County
- Radon levels in Dyer CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 1.4 pCi/L · 22 tests · 5.3 points below Gibson County
Gibson County, Cities and towns
Cities and towns in Gibson County
The Census Bureau estimates 51,779 residents in Gibson County for July 1, 2025, 1,336 more than in 2020 (+2.6%). That works out to 86 people per square mile of land. No town dominates: Milan, the largest, has 8,367 residents, 16.2% of the total. Reported testing is thin here: 57 tests over 2008 to 2017, or 1.1 for every 1,000 residents (2025 estimate), where Tennessee as a whole comes to 4.2.
From Milan to Yorkville, CDC publishes no figure by town: each reads Gibson County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Milan | 8,367 | +2.4% | 16.2% |
| Humboldtextends beyond Gibson County | 7,841 | −0.5% | Counted whole |
| Medina | 5,813 | +12.8% | 11.2% |
| Trenton | 4,137 | −2.3% | 8.0% |
| Dyer | 2,333 | +1.3% | 4.5% |
| Kentonextends beyond Gibson County | 1,248 | −2.7% | Counted whole |
| Rutherford | 1,147 | −0.9% | 2.2% |
| Bradford | 1,006 | +0.4% | 1.9% |
| Gibson | 374 | +2.7% | 0.7% |
| Yorkville | 228 | −1.7% | 0.4% |
10 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 Gibson County is counted whole, so it has no share.
Gibson County, Homes
Homes in Gibson County
Of Gibson County's 22,500 homes, 75% are detached houses, against 68% across Tennessee; 11% are mobile homes. The homes are older than Tennessee's as a whole: half were built before 1976 (1986 for Tennessee), and 29% date from before 1960. 67% 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 | Gibson County | Tennessee |
|---|---|---|
| Housing units | 22,500 | 3,095,472 |
| Detached houses | 75% | 68% |
| In buildings of 5 or more | 6% | 14% |
| Mobile homes | 11% | 8% |
| Built before 1960 | 29% | 18% |
| Built since 2000 | 20% | 29% |
| Middle year built | 1976 | 1986 |
| Owner-occupied | 67% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.