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 Clarke County, Georgia
EPA puts Clarke County in Zone 2, its middle radon zone, and most reported tests there come back low, though 12.8% of 584 (2008 to 2017, laboratory totals) reached 4 pCi/L. Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Share at 4+ pCi/L
12.8%
12.0 pts below GA
- Clarke
- 12.8%
- Georgia
- 24.8%
584 tests, 2008 to 2017
Median result
1.5pCi/L
Below action level
- Clarke
- 1.5 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
584
10th of 57 by tests
- Clarke
- 584
- Fulton
- 4,858
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 Georgia
51 of 57
Lowest quarter
- Clarke
- 12.8%
- Barrow
- 48.3%
By share, of 57 with 30+ tests
Read a result for Clarke County
Starts at Clarke County's median, 1.5 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 1.5 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. Clarke County's median reported result, 2008 to 2017.
The data
Clarke County, At a glance
Clarke County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Clarke County is a
USGS geologic potential: Moderate 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
Under 2 pCi/L: 63%2 to 4 pCi/L: 24%4 pCi/L and above: 13%
Of 584 pre-mitigation tests reported to CDC, not homes in this area.
| Result band | Tests Measured | Share Measured |
|---|---|---|
| Under 2 pCi/L | 369 | 63.2% |
| 2 to 4 pCi/L | 140 | 24.0% |
| 4 pCi/L and above | 75 | 12.8% |
What these figures count
These are the 584 tests reported to CDC for Clarke County over 2008 to 2017 (laboratory totals), many from homes being sold or already suspected of a problem: they describe the county's reported tests, not this house.
Measured: CDC tracking data. Figure above: 2008 to 2017, laboratory. Measured data period: 2005 to 2017 (every CDC figure on file).
Clarke County, Compared
Clarke County radon figures, compared
Calculated by Radon411Clarke County reports fewer high tests than Georgia overall. 12.8% of its 584 tests over the 2008 to 2017 laboratory totals were at or above 4 pCi/L. That is 12.0 points below the 24.8% pooled from 129 Georgia counties.
Ordered from highest share down, it comes 51st of 57 Georgia counties with 30 or more tests for the same period. Nationally, every county with a figure for the same period pools to 35.7%; Clarke County sits 22.9 points below it.
Next door, the shares run from 19.0% in Oconee County to 48.3% in Barrow County. Zone 2 on EPA's map (predicted average between 2 and 4 pCi/L) and a 12.8% share point the same way here.
Half the tests came in under 1.5 pCi/L and half over it; the single highest reached 16.1 pCi/L. The rest split 63.2% under 2 pCi/L and 24.0% from 2 to 4 (Georgia: 44.0% and 31.2%).
CDC's ten-year totals for Clarke County went from 785 tests (2005 to 2014) to 584 (2008 to 2017), the share going from 11.3% to 12.8%.
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: moderate radon potential. All of it lies in the area the map calls Georgiabama Thrust Stack (South), to which USGS gives a radon index of 9, in the moderate band (9 to 11).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Georgiabama Thrust Stack (South) | Schist, amphibolite and granite. | Moderate | 9 | 100% |
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
Clarke County has more moderate-potential ground than Georgia as a whole: 100% of its land against 26.5%. Of the 5 counties that border it, none has as large a share of moderate-potential ground; Barrow County comes nearest at 100%.
The map rates the ground, not the air in any home.
Local help
Clarke County, Local resources
Radon testing and mitigation in Clarke County
- Georgia's radon programGeorgia Attorney General's Consumer Protection DivisionGeorgia's radon program does not license radon professionals and offers free or discounted test kits, and answers questions about testing and mitigation in Georgia.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsThe program says:
A kit costs $15.00 if mailed or $10.00 if picked up at a participating County Extension office.
- Compare kits
- Professionals in Georgia3 professionals are listed in Georgia.
What Georgia's program says
- Licensing of radon professionals
There are no laws mandating a mitigator receive certification in Georgia, however, many mitigators choose to get certified by one of two national programs.
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, 12.8% of the radon tests reported to CDC for Clarke County, Georgia were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.5 pCi/L. Of 57 Georgia counties with 30 or more tests for the same period, 50 reported a higher share; pooled, the state comes to 24.8%.
Which counties border Clarke County?
Clarke County borders 5 counties: Oconee County, Madison County, Jackson County, Barrow County and Oglethorpe County.
Products
Clarke County, Products
Testing a home in Clarke County
In Clarke County, 12.8% of 584 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 24.8% pooled across Georgia. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Clarke 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
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
Clarke County, Bordering counties
Counties bordering Clarke County
Calculated by Radon411- Radon levels in Barrow CountyEPA zone 2
48.3%at or above 4 pCi/L
Median 3.8 pCi/L · 321 tests · 35.5 points above Clarke County
- Radon levels in Jackson CountyEPA zone 2
40.0%at or above 4 pCi/L
Median 3.2 pCi/L · 460 tests · 27.2 points above Clarke County
- Radon levels in Oglethorpe CountyEPA zone 2
32.9%at or above 4 pCi/L
Median 2.5 pCi/L · 73 tests · 20.1 points above Clarke County
- Radon levels in Madison CountyEPA zone 2
26.1%at or above 4 pCi/L
Median 2.4 pCi/L · 211 tests · 13.3 points above Clarke County
- Radon levels in Oconee CountyEPA zone 2
19.0%at or above 4 pCi/L
Median 1.8 pCi/L · 483 tests · 6.2 points above Clarke County
Clarke County, Cities and towns
Cities and towns in Clarke County
The Census Bureau estimates 129,921 residents in Clarke County for July 1, 2025, 1,326 more than in 2020 (+1.0%). Packed into its land, that is 1,090 people per square mile. Bogart, the largest place on its list (1,326 residents in all), extends beyond Clarke County, so no share of the total is worked out for it. Testing is reported here more often than across the state: CDC's 584 reported tests for 2008 to 2017 come to 4.5 for every 1,000 residents (2025 estimate), against 2.7 for Georgia.
From Bogart to Winterville, CDC publishes no figure by town: each reads Clarke County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Bogartextends beyond Clarke County | 1,326 | +3.4% | Counted whole |
| Winterville | 1,203 | −0.2% | 0.9% |
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). A place that extends beyond Clarke County is counted whole, so it has no share.
Clarke County, Homes
Homes in Clarke County
Fewer than six in ten of Clarke County's 56,913 homes are detached houses (49%, against 66% across Georgia); the rest are attached, in shared buildings or mobile. Half of its homes were built before 1987, close to Georgia's 1991: 13% date from before 1960 and 29% from 2000 or later. Most occupied homes here are rented: owners live in 41% (Georgia: 65%). A tenant can run a test; a fix is the landlord's to make.
| Homes | Clarke County | Georgia |
|---|---|---|
| Housing units | 56,913 | 4,483,873 |
| Detached houses | 49% | 66% |
| In buildings of 5 or more | 29% | 16% |
| Mobile homes | 4% | 8% |
| Built before 1960 | 13% | 12% |
| Built since 2000 | 29% | 33% |
| Middle year built | 1987 | 1991 |
| Owner-occupied | 41% | 65% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.