Short-term kitempowerDX
Standard Radon Test short-term mail-in radon test kit
- Lab fee included
Method: Passive sampler
In home: 48 to 96 hours
Locations and reports
Radon Levels in Hart County, Georgia
EPA puts Hart County in Zone 2, its middle radon zone, and high results are common there: 40.2% of the 107 radon tests reported to CDC (2008 to 2017, laboratory totals) came back at or above 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
40.2%
15.4 pts above GA
- Hart
- 40.2%
- Georgia
- 24.8%
107 tests, 2008 to 2017
Median result
3.4pCi/L
Below action level
- Hart
- 3.4 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
107
35th of 57 by tests
- Hart
- 107
- 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
9 of 57
Top quarter
- Hart
- 40.2%
- Barrow
- 48.3%
By share, of 57 with 30+ tests
Read a result for Hart County
Starts at Hart County's median, 3.4 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 3.4 pCi/L
Between 2 and 4 pCi/L
- Under 20 to 1.9 pCi/L
- 2 to 4consider a fix
- 4 and aboveEPA says fix it
This result is between 2 and 4 pCi/L. EPA recommends considering a fix when the level is between 2 and 4 pCi/L. Hart County's median reported result, 2008 to 2017.
The data
Hart County, At a glance
Hart County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Hart 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 Hart County, 2008 to 2017, laboratory
Under 2 pCi/L: 21%2 to 4 pCi/L: 39%4 pCi/L and above: 40%
Of 107 pre-mitigation tests reported to CDC, not homes in this area.
| Result band | Tests Measured | Share Measured |
|---|---|---|
| Under 2 pCi/L | 22 | 20.6% |
| 2 to 4 pCi/L | 42 | 39.3% |
| 4 pCi/L and above | 43 | 40.2% |
What these figures count
These are the 107 tests reported to CDC for Hart 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).
Hart County, Compared
Hart County radon figures, compared
Calculated by Radon411In Hart County, about 4 in 10 reported tests over the 2008 to 2017 laboratory totals (43 of 107) were at or above EPA's action level. Against the national pool of 35.7%, the gap is 4.5 points higher. Across 129 Georgia counties pooled together, 24.8% of tests reached that level, so Hart County runs 15.4 points above its state.
Of 4 neighbours with a figure, 1 reported a larger share at or above 4 pCi/L and 3 a smaller one; the spread is 11.1% (Anderson County, SC) to 42.6% (Oconee County, SC). By share, Hart County is 9th of 57 Georgia counties with 30 or more tests for the same period.
Half the tests came in under 3.4 pCi/L and half over it; the single highest reached 24.7 pCi/L. Below the action level, 22 tests (20.6%) came in under 2 pCi/L, against 44.0% statewide, and 42 tests (39.3%) fell between 2 and 4, against 31.2% statewide.
Zone 2 on EPA's map (predicted average between 2 and 4 pCi/L) and a 40.2% share point the same way here. USGS geology rates 100% of the county's land moderate radon potential. CDC also counts 9 tests taken after mitigation in Hart County for the same period: tests in homes where a fix was already in.
CDC's ten-year totals for Hart County went from 86 tests (2005 to 2014) to 107 (2008 to 2017), the share going from 43.0% to 40.2%.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Hart County, Geology
The ground under Hart County
PredictedUSGS's geologic map puts all of Hart 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 | 99.8% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Hart County beside the ground around it
Hart 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, 1 has more high-potential ground, Oconee County, SC the most at 11.0%.
The map rates the ground, not the air in any home.
Local help
Hart County, Local resources
Radon testing and mitigation in Hart 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
Hart County, Questions
Questions about radon in Hart County
Are radon levels high in Hart County?
Over the 2008 to 2017 laboratory totals, 40.2% of the radon tests reported to CDC for Hart County, Georgia were at or above 4 pCi/L, and the median reported pre-mitigation result was 3.4 pCi/L. Of 57 Georgia counties with 30 or more tests for the same period, 8 reported a higher share; pooled, the state comes to 24.8%.
Which counties border Hart County?
Hart County borders 5 counties: Franklin County, GA, Elbert County, GA, Madison County, GA, Anderson County, SC and Oconee County, SC.
Products
Hart County, Products
Testing a home in Hart County
In Hart County, 40.2% of 107 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 Hart County; a long-term test tells the year-round average.
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
MonitorAEGTEST
HOUND-1011 rechargeable radon detector with a screen
- C-NRPP 2024/25: Not included
- Battery
- Alarm
- Screen
Method: Semiconductor sensor
First reading: Within 6 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Hart County, Bordering counties
Counties bordering Hart County
Calculated by Radon411- Radon levels in Oconee County, SCEPA zone 2
42.6%at or above 4 pCi/L
Median 3.3 pCi/L · 2,469 tests · 2.4 points above Hart County
- Radon levels in Franklin County, GAEPA zone 2
37.0%at or above 4 pCi/L
Median 2.7 pCi/L · 27 tests · 3.2 points below Hart County
- Radon levels in Madison County, GAEPA zone 2
26.1%at or above 4 pCi/L
Median 2.4 pCi/L · 211 tests · 14.1 points below Hart County
- Radon levels in Elbert County, GAEPA zone 2
18.6%at or above 4 pCi/L
Median 1.9 pCi/L · 145 tests · 21.6 points below Hart County
- Radon levels in Anderson County, SCEPA zone 2
11.1%at or above 4 pCi/L
Median 1.1 pCi/L · 1,733 tests · 29.1 points below Hart County
Hart County, Cities and towns
Cities and towns in Hart County
Hart County is growing: the Census Bureau puts it at 28,639 residents on July 1, 2025, up 10.7% from 25,872 in 2020. That works out to 123 people per square mile of land. No town dominates: Hartwell, the largest, has 4,914 residents, 17.2% of the total. CDC's 107 reported tests for 2008 to 2017 work out to 3.7 per 1,000 residents (2025 estimate), close to Georgia's 2.7.
From Hartwell to Bowersville, CDC publishes no figure by town: each reads Hart County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Hartwell | 4,914 | +10.5% | 17.2% |
| Roystonextends beyond Hart County | 2,693 | +1.9% | Counted whole |
| Lavoniaextends beyond Hart County | 2,200 | +3.2% | Counted whole |
| Canonextends beyond Hart County | 732 | +12.3% | Counted whole |
| Bowersville | 427 | +8.4% | 1.5% |
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). A place that extends beyond Hart County is counted whole, so it has no share.
Hart County, Homes
Homes in Hart County
Of Hart County's 13,019 homes, 69% are detached houses, against 66% across Georgia; 24% are mobile homes. Half of its homes were built before 1986, close to Georgia's 1991: 15% date from before 1960 and 24% from 2000 or later. Owners live in 75% of the occupied homes (Georgia: 65%), so for most households a test and a fix are their own to order.
| Homes | Hart County | Georgia |
|---|---|---|
| Housing units | 13,019 | 4,483,873 |
| Detached houses | 69% | 66% |
| In buildings of 5 or more | 3% | 16% |
| Mobile homes | 24% | 8% |
| Built before 1960 | 15% | 12% |
| Built since 2000 | 24% | 33% |
| Middle year built | 1986 | 1991 |
| Owner-occupied | 75% | 65% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.