Short-term kit
RA100 short-term liquid scintillation radon test kit
- Lab fee extra
Method: Liquid scintillation
In home: 48 to 96 hours
Locations and reports
Radon Levels in Greene County, Georgia
EPA puts Greene County in Zone 2, its middle radon zone, and 17.6% of its 74 reported radon tests (2008 to 2017, laboratory totals) were 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
17.6%
7.2 pts below GA
- Greene
- 17.6%
- Georgia
- 24.8%
74 tests, 2008 to 2017
Median result
1.9pCi/L
Below action level
- Greene
- 1.9 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
74
42nd of 57 by tests
- Greene
- 74
- 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
46 of 57
Lowest quarter
- Greene
- 17.6%
- Barrow
- 48.3%
By share, of 57 with 30+ tests
Read a result for Greene County
Starts at Greene County's median, 1.9 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 1.9 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. Greene County's median reported result, 2008 to 2017.
The data
Greene County, At a glance
Greene County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Greene County is a
USGS geologic potential: Low across 63% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Greene County, 2008 to 2017, laboratory
Under 2 pCi/L: 50%2 to 4 pCi/L: 32%4 pCi/L and above: 18%
Of 74 pre-mitigation tests reported to CDC, not homes in this area.
| Result band | Tests Measured | Share Measured |
|---|---|---|
| Under 2 pCi/L | 37 | 50.0% |
| 2 to 4 pCi/L | 24 | 32.4% |
| 4 pCi/L and above | 13 | 17.6% |
What these figures count
These are the 74 tests reported to CDC for Greene 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).
Greene County, Compared
Greene County radon figures, compared
Calculated by Radon411Greene County's 74 reported tests over the 2008 to 2017 laboratory totals had a middle value of 1.9 pCi/L and a maximum of 10.4 pCi/L, and 17.6% reached 4 pCi/L. Georgia as a whole (129 Georgia counties, pooled) comes to 24.8%: 7.2 points higher than here.
Among its state's counties it ranks 46th of 57 Georgia counties with 30 or more tests for the same period. Statewide for the same period, Barrow County reported the highest share (48.3%) and Richmond County the lowest (0.0%).
Below the action level, 37 tests (50.0%) came in under 2 pCi/L, against 44.0% statewide, and 24 tests (32.4%) fell between 2 and 4, against 31.2% statewide. CDC's ten-year totals for Greene County went from 51 tests (2005 to 2014) to 74 (2008 to 2017), the share going from 9.8% to 17.6%.
EPA's 1993 zone map puts Greene County in Zone 2, a predicted county average between 2 and 4 pCi/L. USGS geology rates 63% of the county's land low radon potential.
Next door, the shares run from 16.7% in Morgan County to 32.9% in Oglethorpe County, with Morgan County below Greene County.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Greene County, Geology
The ground under Greene County
PredictedUSGS's geologic map splits Greene County: 62.8% of its land is low radon potential and 37.2% moderate. The map puts 62.8% of Greene County in the area it calls Little River Thrust Stack and 37.2% in Georgiabama Thrust Stack (South). USGS gives the first a radon index of 7, in the low band (5 to 8), and the second 9, in the moderate band (9 to 11).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Little River Thrust Stack | Biotite and amphibolite gneiss, granite gneiss, mica schist. | Low | 7 | 62.8% |
| Georgiabama Thrust Stack (South) | Schist, amphibolite and granite. | Moderate | 9 | 37.2% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Greene County beside the ground around it
Greene County has more moderate-potential ground than Georgia as a whole: 37.2% of its land against 26.5%. Of the 6 counties that border it, 3 have more moderate-potential ground, Oconee County the most at 100%.
The map rates the ground, not the air in any home.
Local help
Greene County, Local resources
Radon testing and mitigation in Greene 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
Greene County, Questions
Questions about radon in Greene County
Are radon levels high in Greene County?
Over the 2008 to 2017 laboratory totals, 17.6% of the radon tests reported to CDC for Greene County, Georgia were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.9 pCi/L. Of 57 Georgia counties with 30 or more tests for the same period, 45 reported a higher share; pooled, the state comes to 24.8%.
Which counties border Greene County?
Greene County borders 6 counties: Taliaferro County, Putnam County, Morgan County, Hancock County, Oglethorpe County and Oconee County.
Products
Greene County, Products
Testing a home in Greene County
In Greene County, 17.6% of 74 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 Greene 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
lüft plug-in radon and indoor air quality monitor
- C-NRPP 2024/25: Approved
- Plug-in
- Wi-Fi, Bluetooth
- App only
First reading: Within 90 minutes
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Greene County, Bordering counties
Counties bordering Greene County
Calculated by Radon411- Radon levels in Oglethorpe CountyEPA zone 2
32.9%at or above 4 pCi/L
Median 2.5 pCi/L · 73 tests · 15.3 points above Greene County
- Radon levels in Putnam CountyEPA zone 3
30.0%at or above 4 pCi/L
Median 2.2 pCi/L · 30 tests · 12.4 points above Greene County
- Radon levels in Oconee CountyEPA zone 2
19.0%at or above 4 pCi/L
Median 1.8 pCi/L · 483 tests · 1.4 points above Greene County
- Radon levels in Morgan CountyEPA zone 2
16.7%at or above 4 pCi/L
Median 1.5 pCi/L · 54 tests · 0.9 points below Greene County
- Radon levels in Hancock CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 2.0 pCi/L · 4 tests · 17.6 points below Greene County
- Radon levels in Taliaferro CountyEPA zone 3
No CDC figure for 2008 to 2017; its page reads it against its own neighbours.
Greene County, Cities and towns
Cities and towns in Greene County
Greene County is growing: the Census Bureau puts it at 21,367 residents on July 1, 2025, up 12.3% from 19,030 in 2020. That works out to 55 people per square mile of land. No town dominates: Greensboro, the largest, has 3,519 residents, 16.5% of the total. Together its 5 incorporated places hold 28.8% of those residents; the other 71.2% live outside any of them. CDC's 74 reported tests for 2008 to 2017 work out to 3.5 per 1,000 residents (2025 estimate), close to Georgia's 2.7.
From Greensboro to Siloam, CDC publishes no figure by town: each reads Greene County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Greensboro | 3,519 | −2.8% | 16.5% |
| Union Point | 1,856 | +15.4% | 8.7% |
| Woodville | 310 | +15.7% | 1.5% |
| White Plains | 271 | +15.3% | 1.3% |
| Siloam | 191 | −0.5% | 0.9% |
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).
Greene County, Homes
Homes in Greene County
Greene County is a place of houses on their own lots: 78% of its 10,503 homes are detached single-family houses, against 66% across Georgia. Half of its homes were built before 1996, close to Georgia's 1991: 16% date from before 1960 and 42% from 2000 or later. Owners live in 79% of the occupied homes (Georgia: 65%), so for most households a test and a fix are their own to order.
| Homes | Greene County | Georgia |
|---|---|---|
| Housing units | 10,503 | 4,483,873 |
| Detached houses | 78% | 66% |
| In buildings of 5 or more | 4% | 16% |
| Mobile homes | 13% | 8% |
| Built before 1960 | 16% | 12% |
| Built since 2000 | 42% | 33% |
| Middle year built | 1996 | 1991 |
| Owner-occupied | 79% | 65% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.