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 Washita County, Oklahoma
EPA puts Washita County in Zone 3, its lowest radon zone, and only 3 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
Nearest county
8.9%
Oklahoma County, 91 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
- Washita
- 0.0%
- Oklahoma
- 15.2%
Share of land USGS rates moderate or high potential
Tests reported
3
Too few for a share
- Washita
- 3
- Needed
- 30
2008 to 2017, 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 Washita 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
Washita County, At a glance
Washita 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 Washita County, 2008 to 2017, laboratory
CDC holds 3 reported tests for Washita County over the 2008 to 2017 laboratory totals, with a median of 2.8 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Washita County beside the counties around it is how this page reads it.
What these figures count
Only 3 tests were reported to CDC for Washita 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).
Washita County, Compared
Washita County radon figures, compared
Calculated by Radon411CDC's largest figure for Washita County rests on 3 tests over the 2008 to 2017 laboratory totals, 0 of them at or above 4 pCi/L, so each test moves its share by 33.3 points and no rank or comparison is drawn from it. Results reached as high as 2.9 pCi/L, with a middle value of 2.8 pCi/L.
The nearest counties with a figure are Oklahoma County (91 miles away) at 8.9%, Tulsa County (181 miles away) at 6.0% and Washington County (199 miles away) at 11.3%. Pooled across 53 Oklahoma counties, 12.6% of reported tests reached that level; across every county in the country with a figure, 36.3%.
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 Washita 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.
Washita County, Geology
The ground under Washita County
PredictedUSGS's geologic map puts all of Washita 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.
Washita County beside the ground around it
Across Oklahoma 0.6% of the land is rated high; none of Washita County's is. Of the 4 counties that border it, 1 has more moderate-potential ground, Beckham County the most at 0.1%.
The map rates the ground, not the air in any home.
Local help
Washita County, Local resources
Radon testing and mitigation in Washita 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
Washita County, Questions
Questions about radon in Washita County
Are radon levels high in Washita County?
Over the 2008 to 2017 laboratory totals, 0.0% of the radon tests reported to CDC for Washita County, Oklahoma were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.8 pCi/L. Of the 5 nearest counties with a figure, within 247 miles, the share of tests at or above 4 pCi/L runs from 6.0% to 44.7%.
Which counties border Washita County?
Washita County borders 4 counties: Custer County, Kiowa County, Caddo County and Beckham County.
Products
Washita County, Products
Testing a home in Washita County
No CDC figure names Washita County; the nearest county with one, Oklahoma County (91 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 Washita 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
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
Washita County, Bordering counties
Counties bordering Washita County
Calculated by Radon411- Radon levels in Custer CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 2.3 pCi/L · 2 tests
- Radon levels in Beckham CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 1.5 pCi/L · 5 tests
- Radon levels in Kiowa CountyEPA zone 3
No CDC figure for 2006 to 2015; its page reads it against its own neighbours.
- Radon levels in Caddo CountyEPA zone 3
No CDC figure for 2006 to 2015; its page reads it against its own neighbours.
Washita County, Cities and towns
Cities and towns in Washita County
Washita County's population has barely moved since 2020: 10,884 residents on July 1, 2025 against 10,903 then, by the Census Bureau's estimates. That works out to 11 people per square mile of land. Clinton, the largest place on its list (8,302 residents in all), extends beyond Washita County, so no share of the total is worked out for it. CDC's 3 reported tests for 2008 to 2017 work out to 0.3 per 1,000 residents (2025 estimate), close to Oklahoma's 0.2.
From Clinton to Foss, CDC publishes no figure by town: each reads Washita County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Clintonextends beyond Washita County | 8,302 | −2.3% | Counted whole |
| New Cordell | 2,746 | −0.5% | 25.2% |
| Burns Flat | 1,918 | −1.5% | 17.6% |
| Sentinel | 756 | −0.1% | 6.9% |
| Corn | 589 | −0.8% | 5.4% |
| Canute | 488 | +1.5% | 4.5% |
| Dill City | 417 | +0.2% | 3.8% |
| Bessie | 182 | +0.6% | 1.7% |
| Rocky | 126 | −0.8% | 1.2% |
| Colony | 106 | −0.9% | 1.0% |
| Foss | 105 | +1.0% | 1.0% |
11 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 Washita County is counted whole, so it has no share.
Washita County, Homes
Homes in Washita County
Washita County is a place of houses on their own lots: 79% of its 5,131 homes are detached single-family houses, against 73% across Oklahoma. The homes are older than Oklahoma's as a whole: half were built before 1963 (1980 for Oklahoma), and 45% date from before 1960. 75% 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 | Washita County | Oklahoma |
|---|---|---|
| Housing units | 5,131 | 1,763,036 |
| Detached houses | 79% | 73% |
| In buildings of 5 or more | 2% | 12% |
| Mobile homes | 9% | 9% |
| Built before 1960 | 45% | 21% |
| Built since 2000 | 10% | 25% |
| Middle year built | 1963 | 1980 |
| Owner-occupied | 75% | 66% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.