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 Forsyth County, Georgia
EPA puts Forsyth County in Zone 2, its middle radon zone, and most reported tests there come back low, though 13.0% of 1,383 (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
13.0%
11.8 pts below GA
- Forsyth
- 13.0%
- Georgia
- 24.8%
1,383 tests, 2008 to 2017
Median result
1.9pCi/L
Below action level
- Forsyth
- 1.9 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
1,383
5th of 57 by tests
- Forsyth
- 1,383
- 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
50 of 57
Lowest quarter
- Forsyth
- 13.0%
- Barrow
- 48.3%
By share, of 57 with 30+ tests
Read a result for Forsyth County
Starts at Forsyth 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. Forsyth County's median reported result, 2008 to 2017.
The data
Forsyth County, At a glance
Forsyth County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Forsyth 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 Forsyth County, 2008 to 2017, laboratory
Under 2 pCi/L: 53%2 to 4 pCi/L: 34%4 pCi/L and above: 13%
Of 1,383 pre-mitigation tests reported to CDC, not homes in this area.
| Result band | Tests Measured | Share Measured |
|---|---|---|
| Under 2 pCi/L | 728 | 52.6% |
| 2 to 4 pCi/L | 475 | 34.3% |
| 4 pCi/L and above | 180 | 13.0% |
What these figures count
These are the 1,383 tests reported to CDC for Forsyth 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).
Forsyth County, Compared
Forsyth County radon figures, compared
Calculated by Radon411Forsyth County reports fewer high tests than Georgia overall. 13.0% of its 1,383 tests over the 2008 to 2017 laboratory totals were at or above 4 pCi/L. That is 11.8 points below the 24.8% pooled from 129 Georgia counties.
Ordered from highest share down, it comes 50th 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%; Forsyth County sits 22.7 points below it.
Next door, the shares run from 17.6% in Cherokee County to 39.8% in Hall County. Zone 2 on EPA's map (predicted average between 2 and 4 pCi/L) and a 13.0% share point the same way here.
Half the tests came in under 1.9 pCi/L and half over it; the single highest reached 82.5 pCi/L. The rest split 52.6% under 2 pCi/L and 34.3% from 2 to 4 (Georgia: 44.0% and 31.2%).
CDC's ten-year totals for Forsyth County went from 919 tests (2005 to 2014) to 1,383 (2008 to 2017), the share going from 10.9% to 13.0%.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Forsyth County, Geology
The ground under Forsyth County
PredictedUSGS's geologic map puts all of Forsyth County's mapped land in one class: moderate radon potential. 98.6% 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 | 98.6% |
| Georgiabama Thrust Stack (North) | Gneiss, phyllite, and schist. | Moderate | 9 | 1.4% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Forsyth County beside the ground around it
Forsyth 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; Dawson County comes nearest at 100%.
The map rates the ground, not the air in any home.
Local help
Forsyth County, Local resources
Radon testing and mitigation in Forsyth 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
Forsyth County, Questions
Questions about radon in Forsyth County
Are radon levels high in Forsyth County?
Over the 2008 to 2017 laboratory totals, 13.0% of the radon tests reported to CDC for Forsyth 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, 49 reported a higher share; pooled, the state comes to 24.8%.
Which counties border Forsyth County?
Forsyth County borders 5 counties: Gwinnett County, Cherokee County, Hall County, Dawson County and Fulton County.
Products
Forsyth County, Products
Testing a home in Forsyth County
In Forsyth County, 13.0% of 1,383 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 Forsyth 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
EcoQube Wi-Fi continuous radon monitor
- C-NRPP 2024/25: Approved
- Plug-in
- Wi-Fi
- App only
Method: Ion chamber
First reading: Within 10 minutes
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Forsyth County, Bordering counties
Counties bordering Forsyth County
Calculated by Radon411- Radon levels in Hall CountyEPA zone 2
39.8%at or above 4 pCi/L
Median 3.2 pCi/L · 1,303 tests · 26.8 points above Forsyth County
- Radon levels in Gwinnett CountyEPA zone 1
32.4%at or above 4 pCi/L
Median 2.7 pCi/L · 4,187 tests · 19.4 points above Forsyth County
- Radon levels in Dawson CountyEPA zone 2
21.8%at or above 4 pCi/L
Median 2.1 pCi/L · 142 tests · 8.8 points above Forsyth County
- Radon levels in Fulton CountyEPA zone 1
20.8%at or above 4 pCi/L
Median 2.2 pCi/L · 4,858 tests · 7.8 points above Forsyth County
- Radon levels in Cherokee CountyEPA zone 2
17.6%at or above 4 pCi/L
Median 2.0 pCi/L · 1,154 tests · 4.6 points above Forsyth County
Forsyth County, Cities and towns
Cities and towns in Forsyth County
Forsyth County is growing: the Census Bureau puts it at 282,805 residents on July 1, 2025, up 11.8% from 252,877 in 2020. Packed into its land, that is 1,259 people per square mile. Cumming, its one incorporated place, has 12,494 residents, 4.4% of the total. Testing is reported here more often than across the state: CDC's 1,383 reported tests for 2008 to 2017 come to 4.9 for every 1,000 residents (2025 estimate), against 2.7 for Georgia.
Cumming is the one incorporated place here; CDC publishes no figure by town, so it reads Forsyth County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Cumming | 12,494 | +69.9% | 4.4% |
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).
Forsyth County, Homes
Homes in Forsyth County
Forsyth County is a place of houses on their own lots: 85% of its 90,537 homes are detached single-family houses, against 66% across Georgia. Much of Forsyth County is recent building: 61% of its homes have gone up since 2000 and the middle year built is 2004, against 1991 for Georgia. Owners live in 85% of the occupied homes (Georgia: 65%), so for most households a test and a fix are their own to order.
| Homes | Forsyth County | Georgia |
|---|---|---|
| Housing units | 90,537 | 4,483,873 |
| Detached houses | 85% | 66% |
| In buildings of 5 or more | 5% | 16% |
| Mobile homes | 3% | 8% |
| Built before 1960 | 2% | 12% |
| Built since 2000 | 61% | 33% |
| Middle year built | 2004 | 1991 |
| Owner-occupied | 85% | 65% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.