Short-term kit
Radon Short Term Test Kit short-term charcoal radon test kit, lab fee included
- Lab fee included
Method: Charcoal
In home: 2 to 7 days
Locations and reports
Radon Levels in Seminole County, Oklahoma
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
Nearest county
8.9%
Oklahoma County, 52 miles
- Oklahoma
- 8.9%
- Oklahoma
- 12.6%
Share at 4+ pCi/L, 135 tests, 2006 to 2015
Ground above low
None
15.2 pts below Oklahoma
- Seminole
- 0.0%
- Oklahoma
- 15.2%
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. Oklahoma County, 52 miles away, is the nearest county with a figure over the 2006 to 2015 laboratory totals.
Seminole County, Compared
Seminole County radon figures, compared
Calculated by Radon411CDC's county radon counts over the 2006 to 2015 laboratory totals cover 53 Oklahoma counties, and Seminole County is not among them: no year's figure and no ten-year laboratory total names it. Pooled across 53 Oklahoma counties, 12.6% of reported tests reached that level; across every county in the country with a figure, 36.3%.
The nearest counties with a figure are Oklahoma County (52 miles away) at 8.9%, Tulsa County (76 miles away) at 6.0% and Cherokee County (104 miles away) at 32.0%. Statewide for the same period, Delaware County reported the highest share (44.7%) and Tulsa County the lowest (6.0%).
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 Central Oklahoma Plains and Hills, to which USGS gives a radon index of 7, in the low band (5 to 8).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Central Oklahoma Plains and Hills | Nonmarine Permian and Tertiary rocks, including shale, sandstone, and conglomerate in the western part, and Mississippian and Pennsylvanian rocks in the eastern part. | Low | 7 | 100% |
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 Oklahoma 0.6% of the land is rated high; none of Seminole County's is. None of the 4 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
- Oklahoma's radon programDepartment of Environmental QualityOklahoma's radon program answers questions about testing, mitigation and the rules in Oklahoma.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsAsk the program whether it has free or discounted kits, or compare kits you can buy.
- Compare kits
- See the Oklahoma directoryNo professionals are listed in Oklahoma yet. The state program can point you to registered testers and mitigators.
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, Oklahoma yet. Of the 5 nearest counties with a figure, within 133 miles, the share of tests at or above 4 pCi/L runs from 6.0% to 44.7%.
Which counties border Seminole County?
Seminole County borders 4 counties: Pottawatomie County, Hughes County, Okfuskee County and Pontotoc County.
Products
Seminole County, Products
Testing a home in Seminole County
No CDC figure names Seminole County; the nearest county with one, Oklahoma County (52 miles away), reported 8.9% of its tests at or above 4 pCi/L over the 2006 to 2015 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
Corentium Home battery digital radon detector
- C-NRPP 2024/25: Approved
- Battery
- Screen
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 Pottawatomie CountyEPA zone 3
9.1%at or above 4 pCi/L
Median 0.1 pCi/L · 11 tests
- Radon levels in Pontotoc CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 0.6 pCi/L · 3 tests
- Radon levels in Hughes CountyEPA zone 3
No CDC figure for 2006 to 2015; its page reads it against its own neighbours.
- Radon levels in Okfuskee CountyEPA zone 3
No CDC figure for 2006 to 2015; 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: 23,441 residents on July 1, 2025 against 23,516 then, by the Census Bureau's estimates. That works out to 37 people per square mile of land. Its largest town, Seminole, has 7,393 residents, 31.5% of the total. CDC publishes no radon test count for Seminole County; across Oklahoma its counts for 2006 to 2015 come to 0.2 tests for every 1,000 residents (2025 estimate).
From Seminole to Lima, CDC publishes no figure by town: each reads Seminole County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Seminole | 7,393 | +3.8% | 31.5% |
| Wewoka | 3,046 | −2.6% | 13.0% |
| Konawa | 1,242 | −4.2% | 5.3% |
| Maudextends beyond Seminole County | 877 | +1.4% | Counted whole |
| Bowlegs | 358 | −1.6% | 1.5% |
| Cromwell | 228 | −3.8% | 1.0% |
| Sasakwa | 78 | −1.3% | 0.3% |
| Lima | 62 | −4.6% | 0.3% |
8 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). A place that extends beyond Seminole County is counted whole, so it has no share.
Seminole County, Homes
Homes in Seminole County
Of Seminole County's 10,789 homes, 75% are detached houses, against 73% across Oklahoma; 16% are mobile homes. Half of its homes were built before 1976, close to Oklahoma's 1980: 31% date from before 1960 and 19% from 2000 or later. 70% of occupied homes are lived in by their owner (Oklahoma: 66%); in the rest a tenant can run a test, but a fix is the landlord's to make.
| Homes | Seminole County | Oklahoma |
|---|---|---|
| Housing units | 10,789 | 1,763,036 |
| Detached houses | 75% | 73% |
| In buildings of 5 or more | 4% | 12% |
| Mobile homes | 16% | 9% |
| Built before 1960 | 31% | 21% |
| Built since 2000 | 19% | 25% |
| Middle year built | 1976 | 1980 |
| Owner-occupied | 70% | 66% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.