Short-term kit
RA400 short-term liquid scintillation radon test kit, lab fee included
- Lab fee included
Method: Liquid scintillation
In home: 48 to 96 hours
Locations and reports
Radon Levels in Rockdale County, Georgia
EPA puts Rockdale County in Zone 2, its middle radon zone, and 29.1% of its 247 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
29.1%
4.3 pts above GA
- Rockdale
- 29.1%
- Georgia
- 24.8%
247 tests, 2008 to 2017
Median result
2.3pCi/L
Below action level
- Rockdale
- 2.3 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
247
22nd of 57 by tests
- Rockdale
- 247
- 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
23 of 57
Middle half
- Rockdale
- 29.1%
- Barrow
- 48.3%
By share, of 57 with 30+ tests
Read a result for Rockdale County
Starts at Rockdale County's median, 2.3 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 2.3 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. Rockdale County's median reported result, 2008 to 2017.
The data
Rockdale County, At a glance
Rockdale County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Rockdale 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 Rockdale County, 2008 to 2017, laboratory
Under 2 pCi/L: 43%2 to 4 pCi/L: 28%4 pCi/L and above: 29%
Of 247 pre-mitigation tests reported to CDC, not homes in this area.
| Result band | Tests Measured | Share Measured |
|---|---|---|
| Under 2 pCi/L | 107 | 43.3% |
| 2 to 4 pCi/L | 68 | 27.5% |
| 4 pCi/L and above | 72 | 29.1% |
What these figures count
These are the 247 tests reported to CDC for Rockdale 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).
Rockdale County, Compared
Rockdale County radon figures, compared
Calculated by Radon411Rockdale County's 247 reported tests over the 2008 to 2017 laboratory totals had a middle value of 2.3 pCi/L and a maximum of 44.4 pCi/L, and 29.1% reached 4 pCi/L. Georgia as a whole (129 Georgia counties, pooled) comes to 24.8%: 4.3 points lower than here.
Among its state's counties it ranks 23rd 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, 107 tests (43.3%) came in under 2 pCi/L, against 44.0% statewide, and 68 tests (27.5%) fell between 2 and 4, against 31.2% statewide. CDC's ten-year totals for Rockdale County went from 214 tests (2005 to 2014) to 247 (2008 to 2017), the share going from 32.2% to 29.1%.
EPA's 1993 zone map puts Rockdale County in Zone 2, a predicted county average between 2 and 4 pCi/L. USGS geology rates 100% of the county's land moderate radon potential.
Next door, the shares run from 18.0% in DeKalb County to 42.2% in Walton County, with Newton County, Henry County and DeKalb County below Rockdale County.
CDC also counts 9 tests taken after mitigation in Rockdale County for the same period: tests in homes where a fix was already in.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Rockdale County, Geology
The ground under Rockdale County
PredictedUSGS's geologic map puts all of Rockdale 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.
Rockdale County beside the ground around it
Rockdale 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; DeKalb County comes nearest at 100%.
The map rates the ground, not the air in any home.
Local help
Rockdale County, Local resources
Radon testing and mitigation in Rockdale 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
Rockdale County, Questions
Questions about radon in Rockdale County
Are radon levels high in Rockdale County?
Over the 2008 to 2017 laboratory totals, 29.1% of the radon tests reported to CDC for Rockdale County, Georgia were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.3 pCi/L. Of 57 Georgia counties with 30 or more tests for the same period, 22 reported a higher share; pooled, the state comes to 24.8%.
Which counties border Rockdale County?
Rockdale County borders 5 counties: Newton County, Walton County, DeKalb County, Henry County and Gwinnett County.
Products
Rockdale County, Products
Testing a home in Rockdale County
In Rockdale County, 29.1% of 247 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 Rockdale 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
Monitor
RadonPro Wi-Fi radon monitor with a built-in Geiger counter
- 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
Rockdale County, Bordering counties
Counties bordering Rockdale County
Calculated by Radon411- Radon levels in Walton CountyEPA zone 2
42.2%at or above 4 pCi/L
Median 3.3 pCi/L · 830 tests · 13.1 points above Rockdale County
- Radon levels in Gwinnett CountyEPA zone 1
32.4%at or above 4 pCi/L
Median 2.7 pCi/L · 4,187 tests · 3.3 points above Rockdale County
- Radon levels in Newton CountyEPA zone 2
25.8%at or above 4 pCi/L
Median 2.1 pCi/L · 186 tests · 3.3 points below Rockdale County
- Radon levels in Henry CountyEPA zone 2
22.7%at or above 4 pCi/L
Median 2.1 pCi/L · 384 tests · 6.4 points below Rockdale County
- Radon levels in DeKalb CountyEPA zone 1
18.0%at or above 4 pCi/L
Median 1.8 pCi/L · 3,475 tests · 11.1 points below Rockdale County
Rockdale County, Cities and towns
Cities and towns in Rockdale County
Rockdale County is growing: the Census Bureau puts it at 98,416 residents on July 1, 2025, up 5.2% from 93,582 in 2020. That works out to 758 people per square mile of land. Conyers, its one incorporated place, has 20,377 residents, 20.7% of the total. CDC's 247 reported tests for 2008 to 2017 work out to 2.5 per 1,000 residents (2025 estimate), close to Georgia's 2.7.
Conyers is the one incorporated place here; CDC publishes no figure by town, so it reads Rockdale County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Conyers | 20,377 | +17.6% | 20.7% |
One incorporated place, 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).
Rockdale County, Homes
Homes in Rockdale County
Rockdale County is a place of houses on their own lots: 75% of its 35,822 homes are detached single-family houses, against 66% across Georgia. Half of its homes were built before 1988, close to Georgia's 1991: 7% date from before 1960 and 30% from 2000 or later. 66% 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 | Rockdale County | Georgia |
|---|---|---|
| Housing units | 35,822 | 4,483,873 |
| Detached houses | 75% | 66% |
| In buildings of 5 or more | 10% | 16% |
| Mobile homes | 5% | 8% |
| Built before 1960 | 7% | 12% |
| Built since 2000 | 30% | 33% |
| Middle year built | 1988 | 1991 |
| Owner-occupied | 66% | 65% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.