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 Houston County, Tennessee
EPA puts Houston 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
Highest bordering
33.8%
Montgomery County
- Montgomery
- 33.8%
- Humphreys
- 23.8%
5 of 5 neighbours have 30+ tests, 2008 to 2017
Nearest county
26.3%
Stewart County, 16 miles
- Stewart
- 26.3%
- Tennessee
- 33.3%
Share at 4+ pCi/L, 95 tests, 2008 to 2017
Ground above low
100.0%
30.5 pts above Tennessee
- Houston
- 100.0%
- Tennessee
- 69.5%
Share of land USGS rates moderate or high potential
Tests reported
17
Too few for a share
- Houston
- 17
- Needed
- 30
2006 to 2015, laboratory
EPA radon zone
Zone 2
Moderate potential
- 1
- Zone 2
- 3
1 highest, 3 lowest
EPA predicts 2 to 4 pCi/L indoors
Read a result for Houston 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
Houston County, At a glance
Houston County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Houston County is a
USGS geologic potential: Moderate across 79% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Houston County, 2023
CDC holds 1 reported test for Houston County in 2023, a result of 3.8 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Houston County beside the counties around it is how this page reads it.
What these figures count
Only 1 test was reported to CDC for Houston 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).
Houston County, Compared
Houston County radon figures, compared
Calculated by Radon411CDC's largest figure for Houston County rests on 17 tests over the 2006 to 2015 laboratory totals, 4 of them at or above 4 pCi/L, so each test moves its share by 5.9 points and no rank or comparison is drawn from it. Results reached as high as 33.3 pCi/L, with a middle value of 2.7 pCi/L.
Of the counties bordering it, 5 have a figure over the 2008 to 2017 laboratory totals: Montgomery County reported the largest share at or above 4 pCi/L, 33.8%, and Humphreys County the smallest, 23.8%, with Benton County at 33.3%, Dickson County at 26.3% and Stewart County at 26.3% between. Farther out, Henry County (33 miles away) at 16.7%, Cheatham County (35 miles away) at 34.1% and Hickman County (36 miles away) at 35.0% 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 Houston County in Zone 2, its middle label: a predicted county average between 2 and 4 pCi/L. USGS geology rates 79% of the county's land moderate radon potential.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Houston County, Geology
The ground under Houston County
PredictedMost of the ground under Houston County is one class on USGS's geologic map: 78.5% of its land is moderate radon potential, with 21.5% high. The map puts 78.5% of Houston County in the area it calls Highland Rim and 21.5% in Cherty Highland. USGS gives the first a radon index of 11, in the moderate band (9 to 11), and the second 12, in the high band (12 to 17).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Highland Rim | Paleozoic sedimentary rocks (limestone, shale, chert, and dolostone). | Moderate | 11 | 78.5% |
| Cherty Highland | Cherty dolostone. | High | 12 | 21.5% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Houston County beside the ground around it
Tennessee as a whole has more high-potential ground than Houston County: 47.2% of its land, against 21.5% here. Of the 5 counties that border it, 3 have more high-potential ground, Benton County the most at 65.8%.
The map rates the ground, not the air in any home.
Local help
Houston County, Local resources
Radon testing and mitigation in Houston 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
Houston County, Questions
Questions about radon in Houston County
Are radon levels high in Houston County?
In 2023, 0.0% of the radon tests reported to CDC for Houston County, Tennessee were at or above 4 pCi/L, and the median reported pre-mitigation result was 3.8 pCi/L. Of the counties bordering it, 5 have a figure over the 2008 to 2017 laboratory totals: Montgomery County reported the largest share at or above 4 pCi/L, 33.8%, and Humphreys County the smallest, 23.8%, with Benton County at 33.3%, Dickson County at 26.3% and Stewart County at 26.3% between.
Which counties border Houston County?
Houston County borders 5 counties: Stewart County, Humphreys County, Dickson County, Benton County and Montgomery County.
Products
Houston County, Products
Testing a home in Houston County
No CDC figure names Houston County; the nearest county with one, Stewart County (16 miles away), reported 26.3% 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. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Houston 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
Houston County, Bordering counties
Counties bordering Houston County
Calculated by Radon411- Radon levels in Montgomery CountyEPA zone 2
33.8%at or above 4 pCi/L
Median 2.3 pCi/L · 597 tests
- Radon levels in Benton CountyEPA zone 2
33.3%at or above 4 pCi/L
Median 2.0 pCi/L · 30 tests
- Radon levels in Stewart CountyEPA zone 2
26.3%at or above 4 pCi/L
Median 2.1 pCi/L · 95 tests
- Radon levels in Dickson CountyEPA zone 2
26.3%at or above 4 pCi/L
Median 2.1 pCi/L · 209 tests
- Radon levels in Humphreys CountyEPA zone 1
23.8%at or above 4 pCi/L
Median 2.0 pCi/L · 105 tests
Houston County, Cities and towns
Cities and towns in Houston County
The Census Bureau estimates 8,479 residents in Houston County for July 1, 2025, 184 more than in 2020 (+2.2%). That works out to 42 people per square mile of land. No town dominates: Tennessee Ridge, the largest, has 1,341 residents, 15.8% of the total. Together its 2 incorporated places hold 30.1% of those residents; the other 69.9% live outside any of them. Reported testing is thin here: 17 tests over 2006 to 2015, or 2.0 for every 1,000 residents (2025 estimate), where Tennessee as a whole comes to 3.5.
From Tennessee Ridge to Erin, CDC publishes no figure by town: each reads Houston County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Tennessee Ridge | 1,341 | +2.0% | 15.8% |
| Erin | 1,207 | −1.5% | 14.2% |
2 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).
Houston County, Homes
Homes in Houston County
Of Houston County's 3,960 homes, 74% are detached houses, against 68% across Tennessee; 21% are mobile homes. Half of its homes were built before 1981, close to Tennessee's 1986: 22% date from before 1960 and 18% from 2000 or later. Owners live in 81% of the occupied homes (Tennessee: 67%), so for most households a test and a fix are their own to order.
| Homes | Houston County | Tennessee |
|---|---|---|
| Housing units | 3,960 | 3,095,472 |
| Detached houses | 74% | 68% |
| In buildings of 5 or more | 1% | 14% |
| Mobile homes | 21% | 8% |
| Built before 1960 | 22% | 18% |
| Built since 2000 | 18% | 29% |
| Middle year built | 1981 | 1986 |
| Owner-occupied | 81% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.