Short-term kit
PicoCan short-term charcoal canister radon test
- Lab fee included
Method: Charcoal
In home: 48 to 96 hours
Locations and reports
Radon Levels in Clarke County, Alabama
EPA puts Clarke County in Zone 3, its lowest radon zone, and only 1 radon test from it is 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
0.0%
Baldwin County
- Baldwin
- 0.0%
1 of 6 neighbours have 30+ tests, 2008 to 2017
Nearest county
3.8%
Mobile County, 65 miles
- Mobile
- 3.8%
- Alabama
- 21.9%
Share at 4+ pCi/L, 52 tests, 2008 to 2017
Ground above low
None
64.7 pts below Alabama
- Clarke
- 0.0%
- Alabama
- 64.7%
Share of land USGS rates moderate or high potential
Tests reported
1
Too few for a share
- Clarke
- 1
- Needed
- 30
2008 to 2017, 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 Clarke 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
Clarke County, At a glance
Clarke 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 Clarke County, 2008 to 2017, laboratory
CDC holds 1 reported test for Clarke County over the 2008 to 2017 laboratory totals, a result of 0.4 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Clarke County beside the counties around it is how this page reads it.
What these figures count
Only 1 test was reported to CDC for Clarke 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. Measured data period: 2008 to 2017.
Clarke County, Compared
Clarke County radon figures, compared
Calculated by Radon411CDC's largest figure for Clarke County rests on 1 test over the 2008 to 2017 laboratory totals, 0 of them at or above 4 pCi/L, so each test moves its share by 100.0 points and no rank or comparison is drawn from it. Results reached as high as 0.4 pCi/L, with a middle value of 0.4 pCi/L.
Baldwin County, the one bordering county with a figure over the 2008 to 2017 laboratory totals, reported 0.0% of its tests at or above 4 pCi/L. Farther out, Mobile County (65 miles away) at 3.8%, Autauga County (91 miles away) at 17.1% and Montgomery County (102 miles away) at 9.7% have figures too. Pooled across 65 Alabama counties, 21.9% of reported tests reached that level; across every county in the country with a figure, 35.7%.
Statewide for the same period, Colbert County reported the highest share (36.2%) and Baldwin County the lowest (0.0%). EPA's 1993 map puts Clarke County in Zone 3, its lowest label: a predicted county average under 2 pCi/L. USGS geology rates 100% of the county's land low radon potential.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Clarke County, Geology
The ground under Clarke County
PredictedUSGS's geologic map puts all of Clarke County's mapped land in one class: low radon potential. The map puts 55.4% of Clarke County in the area it calls Coastal Plain and 44.6% in Jackson Prairies. USGS gives the first a radon index of 7 and the second 8, both in the low band (5 to 8).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Coastal Plain | Marly sandy clay, chalk, and glauconitic sands. | Low | 7 | 55.4% |
| Jackson Prairies | Sand, marl, clay, and limestone. | Low | 8 | 44.6% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Clarke County beside the ground around it
Across Alabama 14.3% of the land is rated high; none of Clarke County's is. Of the 6 counties that border it, 2 have more moderate-potential ground, Marengo County the most at 39.8%.
The map rates the ground, not the air in any home.
Local help
Clarke County, Local resources
Radon testing and mitigation in Clarke County
- Alabama Radon ProgramAlabama Radon Program, run by Alabama Department of Public Health, answers questions about testing, mitigation and the rules in Alabama.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsAsk the program whether it has free or discounted kits, or compare kits you can buy.
- Compare kits
- See the Alabama directoryNo professionals are listed in Alabama yet. The state program can point you to registered testers and mitigators.
What Alabama's program says
- Phone
- (334) 290-6244
What it means
Clarke County, Questions
Questions about radon in Clarke County
Are radon levels high in Clarke County?
Over the 2008 to 2017 laboratory totals, 0.0% of the radon tests reported to CDC for Clarke County, Alabama were at or above 4 pCi/L, and the median reported pre-mitigation result was 0.4 pCi/L. Baldwin County, the one bordering county with a figure over the 2008 to 2017 laboratory totals, reported 0.0% of its tests at or above 4 pCi/L.
Which counties border Clarke County?
Clarke County borders 6 counties: Washington County, Monroe County, Choctaw County, Wilcox County, Marengo County and Baldwin County.
Products
Clarke County, Products
Testing a home in Clarke County
No CDC figure names Clarke County; the nearest county with one, Mobile County (65 miles away), reported 3.8% 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 Clarke County.
Test kits and monitors3
See every kit and monitor
Long-term kit
RL416 long-term radon test kit, lab fee included
- Lab fee included
Method: Alpha track
In home: 90 days to 12 months
Monitor
RadonScan-Plus USB-powered radon monitor with Wi-Fi
- C-NRPP 2024/25: Not included
- Plug-in
- Wi-Fi
- Alarm
- Screen, app
First reading: Within 5 minutes
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Clarke County, Bordering counties
Counties bordering Clarke County
Calculated by Radon411- Radon levels in Marengo CountyEPA zone 3
50.0%at or above 4 pCi/L
Median 9.3 pCi/L · 2 tests
- Radon levels in Washington CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 1.4 pCi/L · 4 tests
- Radon levels in Monroe CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 0.2 pCi/L · 2 tests
- Radon levels in Choctaw CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 0.8 pCi/L · 1 test
- Radon levels in Baldwin CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 1.0 pCi/L · 31 tests
- Radon levels in Wilcox CountyEPA zone 3
No CDC figure for 2008 to 2017; its page reads it against its own neighbours.
Clarke County, Cities and towns
Cities and towns in Clarke County
About 22,014 people live in Clarke County by the Census Bureau's estimate for July 1, 2025, 968 fewer than in 2020 (−4.2%). That works out to 18 people per square mile of land. Its largest town, Jackson, has 4,452 residents, 20.2% of the total. Together its 5 incorporated places hold 46.2% of those residents; the other 53.8% live outside any of them. Reported testing is thin here: 1 test over 2008 to 2017, or under 0.1 for every 1,000 residents (2025 estimate), where Alabama as a whole comes to 2.4.
From Jackson to Fulton, CDC publishes no figure by town: each reads Clarke County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Jackson | 4,452 | −6.1% | 20.2% |
| Thomasville | 3,545 | −4.3% | 16.1% |
| Grove Hill | 1,708 | −5.7% | 7.8% |
| Coffeeville | 249 | −3.5% | 1.1% |
| Fulton | 213 | −4.5% | 1.0% |
5 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).
Clarke County, Homes
Homes in Clarke County
Of Clarke County's 11,727 homes, 67% are detached houses, against 69% across Alabama; 25% are mobile homes. Half of its homes were built before 1982, close to Alabama's 1985: 13% date from before 1960 and 17% from 2000 or later. 71% of occupied homes are lived in by their owner (Alabama: 70%); in the rest a tenant can run a test, but a fix is the landlord's to make.
| Homes | Clarke County | Alabama |
|---|---|---|
| Housing units | 11,727 | 2,316,192 |
| Detached houses | 67% | 69% |
| In buildings of 5 or more | 4% | 12% |
| Mobile homes | 25% | 13% |
| Built before 1960 | 13% | 16% |
| Built since 2000 | 17% | 27% |
| Middle year built | 1982 | 1985 |
| Owner-occupied | 71% | 70% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.