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 McDuffie County, Georgia
EPA puts McDuffie County in Zone 3, its lowest radon zone, and only 12 radon tests from it are 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
9.7%
Columbia County
- Columbia
- 9.7%
- Richmond
- 0.0%
2 of 6 neighbours have 30+ tests, 2007 to 2016
Nearest county
9.7%
Columbia County, 13 miles
- Columbia
- 9.7%
- Georgia
- 23.9%
Share at 4+ pCi/L, 72 tests, 2007 to 2016
Ground above low
None
26.5 pts below Georgia
- McDuffie
- 0.0%
- Georgia
- 26.5%
Share of land USGS rates moderate or high potential
Tests reported
15
Too few for a share
- McDuffie
- 15
- Needed
- 30
2005 to 2014, 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 McDuffie 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
McDuffie County, At a glance
McDuffie 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 McDuffie County, 2008 to 2017, laboratory
CDC holds 12 reported tests for McDuffie County over the 2008 to 2017 laboratory totals, with a median of 0.9 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). McDuffie County beside the counties around it is how this page reads it.
What these figures count
Only 12 tests were reported to CDC for McDuffie 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. Figure above: 2008 to 2017, laboratory. Measured data period: 2005 to 2017 (every CDC figure on file).
McDuffie County, Compared
McDuffie County radon figures, compared
Calculated by Radon411CDC's largest figure for McDuffie County rests on 15 tests over the 2005 to 2014 laboratory totals, 3 of them at or above 4 pCi/L, so each test moves its share by 6.7 points and no rank or comparison is drawn from it. Results reached as high as 36.2 pCi/L, with a middle value of 1.1 pCi/L.
Of the counties bordering it, 2 have a figure over the 2007 to 2016 laboratory totals: Columbia County reported the largest share at or above 4 pCi/L, 9.7%, and Richmond County the smallest, 0.0%. Farther out, Greene County (40 miles away) at 16.7%, Oglethorpe County (44 miles away) at 29.2% and Elbert County (48 miles away) at 16.9% have figures too. Pooled across 137 Georgia counties, 23.9% of reported tests reached that level; across every county in the country with a figure, 35.8%.
Statewide for the same period, Barrow County reported the highest share (51.0%) and Dougherty County the lowest (0.0%). EPA's 1993 map puts McDuffie 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.
McDuffie County, Geology
The ground under McDuffie County
PredictedUSGS's geologic map puts all of McDuffie County's mapped land in one class: low radon potential. The map puts 67.1% of McDuffie County in the area it calls Little River Thrust Stack and 32.9% in Coastal Plain. 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 |
|---|---|---|---|---|
| Little River Thrust Stack | Biotite and amphibolite gneiss, granite gneiss, mica schist. | Low | 7 | 67.1% |
| Coastal Plain | Cretaceous and Tertiary marine and coastal sediments including limestone, sandstone, sand, silt, and clay. Coastal plan sands containing glauconite may generate locally elevated radon. | Low | 8 | 32.9% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
McDuffie County beside the ground around it
Across Georgia 26.5% of the land is rated moderate; none of McDuffie County's is. None of the 6 counties that border it has any moderate-potential ground either.
The map rates the ground, not the air in any home.
Local help
McDuffie County, Local resources
Radon testing and mitigation in McDuffie 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
McDuffie County, Questions
Questions about radon in McDuffie County
Are radon levels high in McDuffie County?
Over the 2008 to 2017 laboratory totals, 8.3% of the radon tests reported to CDC for McDuffie County, Georgia were at or above 4 pCi/L, and the median reported pre-mitigation result was 0.9 pCi/L. Of the counties bordering it, 2 have a figure over the 2007 to 2016 laboratory totals: Columbia County reported the largest share at or above 4 pCi/L, 9.7%, and Richmond County the smallest, 0.0%.
Which counties border McDuffie County?
McDuffie County borders 6 counties: Warren County, Columbia County, Lincoln County, Richmond County, Wilkes County and Jefferson County.
Products
McDuffie County, Products
Testing a home in McDuffie County
No CDC figure names McDuffie County; the nearest county with one, Columbia County (13 miles away), reported 9.7% of its tests at or above 4 pCi/L over the 2007 to 2016 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 McDuffie 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
Corentium Home 2 battery digital radon monitor
- C-NRPP 2024/25: Not included
- Battery
- Bluetooth
- Screen, app
Method: Alpha spectrometry
Readings: Every 60 minutes
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
McDuffie County, Bordering counties
Counties bordering McDuffie County
Calculated by Radon411- Radon levels in Wilkes CountyEPA zone 3
28.6%at or above 4 pCi/L
Median 1.0 pCi/L · 7 tests
- Radon levels in Columbia CountyEPA zone 3
9.7%at or above 4 pCi/L
Median 0.8 pCi/L · 72 tests
- Radon levels in Warren CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 0.8 pCi/L · 1 test
- Radon levels in Lincoln CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 0.1 pCi/L · 3 tests
- Radon levels in Richmond CountyEPA zone 2
0.0%at or above 4 pCi/L
Median 1.3 pCi/L · 35 tests
- Radon levels in Jefferson CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 0.6 pCi/L · 3 tests
McDuffie County, Cities and towns
Cities and towns in McDuffie County
McDuffie County's population has barely moved since 2020: 21,640 residents on July 1, 2025 against 21,609 then, by the Census Bureau's estimates. That works out to 84 people per square mile of land. Its largest town, Thomson, has 6,763 residents, 31.3% of the total. Together its 2 incorporated places hold 33.7% of those residents; the other 66.3% live outside any of them. Reported testing is thin here: 15 tests over 2005 to 2014, or 0.7 for every 1,000 residents (2025 estimate), where Georgia as a whole comes to 2.2.
From Thomson to Dearing, CDC publishes no figure by town: each reads McDuffie County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Thomson | 6,763 | −0.7% | 31.3% |
| Dearing | 534 | +0.6% | 2.5% |
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).
McDuffie County, Homes
Homes in McDuffie County
Of McDuffie County's 9,466 homes, 62% are detached houses, against 66% across Georgia; 28% are mobile homes. Half of its homes were built before 1985, close to Georgia's 1991: 12% date from before 1960 and 18% from 2000 or later. 65% of occupied homes are lived in by their owner (Georgia: 65%); in the rest a tenant can run a test, but a fix is the landlord's to make.
| Homes | McDuffie County | Georgia |
|---|---|---|
| Housing units | 9,466 | 4,483,873 |
| Detached houses | 62% | 66% |
| In buildings of 5 or more | 5% | 16% |
| Mobile homes | 28% | 8% |
| Built before 1960 | 12% | 12% |
| Built since 2000 | 18% | 33% |
| Middle year built | 1985 | 1991 |
| Owner-occupied | 65% | 65% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.