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 Seminole County, Georgia
EPA puts Seminole County in Zone 3, its lowest radon zone. Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Highest bordering
6.1%
Jackson County
- Jackson
- 6.1%
1 of 5 neighbours have 30+ tests, 2007 to 2016
Nearest county
0.0%
Dougherty County, 56 miles
- Dougherty
- 0.0%
- Georgia
- 23.9%
Share at 4+ pCi/L, 32 tests, 2007 to 2016
Ground above low
None
26.5 pts below Georgia
- Seminole
- 0.0%
- Georgia
- 26.5%
Share of land USGS rates moderate or high potential
Tests reported
0
None published
A home here needs its own test
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 Seminole 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
Seminole County, At a glance
Seminole 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
No CDC test figures here
CDC has published no radon test figures for Seminole County. Jackson County, FL, the one bordering county with a figure over the 2007 to 2016 laboratory totals, reported 6.1% of its tests at or above 4 pCi/L.
Seminole County, Compared
Seminole County radon figures, compared
Calculated by Radon411CDC's county radon counts over the 2007 to 2016 laboratory totals cover 137 Georgia counties, and Seminole County is not among them: no year's figure and no ten-year laboratory total names it. Pooled across 137 Georgia counties, 23.9% of reported tests reached that level; across every county in the country with a figure, 35.8%.
Jackson County, FL, the one bordering county with a figure over the 2007 to 2016 laboratory totals, reported 6.1% of its tests at or above 4 pCi/L. Farther out, Dougherty County (56 miles away) at 0.0%, Muscogee County (108 miles away) at 2.1% and Harris County (124 miles away) at 10.9% have figures too. 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 Seminole 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.
Seminole County, Geology
The ground under Seminole County
PredictedUSGS's geologic map puts all of Seminole County's mapped land in one class: low radon potential. All of it lies in the area the map calls Coastal Plain, to which USGS gives a radon index of 8, in the low band (5 to 8).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| 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 | 99.8% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Seminole County beside the ground around it
Across Georgia 26.5% of the land is rated moderate; none of Seminole County's is. None of the 5 counties that border it has any moderate-potential ground either.
The map rates the ground, not the air in any home.
Local help
Seminole County, Local resources
Radon testing and mitigation in Seminole 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
Seminole County, Questions
Questions about radon in Seminole County
Are radon levels high in Seminole County?
No CDC testing statistics are published here for Seminole County, Georgia yet. Jackson County, FL, the one bordering county with a figure over the 2007 to 2016 laboratory totals, reported 6.1% of its tests at or above 4 pCi/L.
Which counties border Seminole County?
Seminole County borders 5 counties: Decatur County, GA, Miller County, GA, Jackson County, FL, Early County, GA and Houston County, AL.
Products
Seminole County, Products
Testing a home in Seminole County
No CDC figure names Seminole County; the nearest county with one, Dougherty County (56 miles away), reported 0.0% 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 Seminole County.
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
Wave Plus battery radon and air quality monitor
- C-NRPP 2024/25: Not included
- Battery
- Bluetooth
- App only
Method: Alpha spectrometry
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Seminole County, Bordering counties
Counties bordering Seminole County
Calculated by Radon411- Radon levels in Early County, GAEPA zone 3
33.3%at or above 4 pCi/L
Median 0.1 pCi/L · 3 tests
- Radon levels in Houston County, ALEPA zone 3
30.0%at or above 4 pCi/L
Median 1.5 pCi/L · 10 tests
- Radon levels in Jackson County, FLEPA zone 3
6.1%at or above 4 pCi/L
Median 0.7 pCi/L · 66 tests
- Radon levels in Decatur County, GAEPA zone 3
0.0%at or above 4 pCi/L
Median 1.6 pCi/L · 4 tests
- Radon levels in Miller County, GAEPA zone 3
No CDC figure for 2007 to 2016; its page reads it against its own neighbours.
Seminole County, Cities and towns
Cities and towns in Seminole County
Seminole County's population has barely moved since 2020: 9,162 residents on July 1, 2025 against 9,129 then, by the Census Bureau's estimates. That works out to 39 people per square mile of land. Its largest town, Donalsonville, has 2,834 residents, 30.9% of the total. Together its 2 incorporated places hold 34.4% of those residents; the other 65.6% live outside any of them. CDC publishes no radon test count for Seminole County; across Georgia its counts for 2007 to 2016 come to 2.6 tests for every 1,000 residents (2025 estimate).
From Donalsonville to Iron City, CDC publishes no figure by town: each reads Seminole County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Donalsonville | 2,834 | Level | 30.9% |
| Iron City | 320 | +0.3% | 3.5% |
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).
Seminole County, Homes
Homes in Seminole County
Of Seminole County's 5,061 homes, 63% are detached houses, against 66% across Georgia; 31% are mobile homes. The homes are older than Georgia's as a whole: half were built before 1980 (1991 for Georgia), and 9% date from before 1960. 75% 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 | Seminole County | Georgia |
|---|---|---|
| Housing units | 5,061 | 4,483,873 |
| Detached houses | 63% | 66% |
| In buildings of 5 or more | 2% | 16% |
| Mobile homes | 31% | 8% |
| Built before 1960 | 9% | 12% |
| Built since 2000 | 15% | 33% |
| Middle year built | 1980 | 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.