Short-term kitFirst Alert
RD1 short-term charcoal radon test kit
- Lab fee included
Method: Charcoal
In home: 2 to 4 days
Locations and reports
Radon Levels in Cleveland County, Oklahoma
EPA puts Cleveland County in Zone 3, its lowest radon zone, and only 24 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
Highest bordering
8.9%
Oklahoma County
- Oklahoma
- 8.9%
1 of 4 neighbours have 30+ tests, 2006 to 2015
Nearest county
8.9%
Oklahoma County, 24 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
- Cleveland
- 0.0%
- Oklahoma
- 15.2%
Share of land USGS rates moderate or high potential
Tests reported
24
Too few for a share
- Cleveland
- 24
- 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 Cleveland 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
Cleveland County, At a glance
Cleveland 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 Cleveland County, 2008 to 2017, laboratory
CDC holds 24 reported tests for Cleveland County over the 2008 to 2017 laboratory totals, with a median of 1.0 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Cleveland County beside the counties around it is how this page reads it.
What these figures count
Only 24 tests were reported to CDC for Cleveland 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).
Cleveland County, Compared
Cleveland County radon figures, compared
Calculated by Radon411CDC's largest figure for Cleveland County rests on 24 tests over the 2008 to 2017 laboratory totals, 0 of them at or above 4 pCi/L, so each test moves its share by 4.2 points and no rank or comparison is drawn from it. Results reached as high as 2.6 pCi/L, with a middle value of 1.0 pCi/L.
Oklahoma County, the one bordering county with a figure over the 2006 to 2015 laboratory totals, reported 8.9% of its tests at or above 4 pCi/L. Farther out, Tulsa County (100 miles away) at 6.0%, Washington County (131 miles away) at 11.3% and Cherokee County (140 miles away) at 32.0% have figures too. 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 Cleveland 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.
Cleveland County, Geology
The ground under Cleveland County
PredictedUSGS's geologic map puts all of Cleveland 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.
Cleveland County beside the ground around it
Across Oklahoma 0.6% of the land is rated high; none of Cleveland 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
Cleveland County, Local resources
Radon testing and mitigation in Cleveland 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
Cleveland County, Questions
Questions about radon in Cleveland County
Are radon levels high in Cleveland County?
Over the 2008 to 2017 laboratory totals, 0.0% of the radon tests reported to CDC for Cleveland County, Oklahoma were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.0 pCi/L. Oklahoma County, the one bordering county with a figure over the 2006 to 2015 laboratory totals, reported 8.9% of its tests at or above 4 pCi/L.
Which counties border Cleveland County?
Cleveland County borders 4 counties: McClain County, Pottawatomie County, Oklahoma County and Canadian County.
Products
Cleveland County, Products
Testing a home in Cleveland County
No CDC figure names Cleveland County; the nearest county with one, Oklahoma County (24 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 Cleveland 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
MonitorPYZYCKYH
RD17 plug-in radon detector with a rechargeable battery and color screen
- C-NRPP 2024/25: Not included
- Battery
- Alarm
- Screen
Method: Semiconductor sensor
First reading: Within 6 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Cleveland County, Bordering counties
Counties bordering Cleveland County
Calculated by Radon411- Radon levels in Canadian CountyEPA zone 3
19.0%at or above 4 pCi/L
Median 0.6 pCi/L · 21 tests
- 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 Oklahoma CountyEPA zone 3
8.9%at or above 4 pCi/L
Median 0.9 pCi/L · 135 tests
- Radon levels in McClain CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 1.5 pCi/L · 3 tests
Cleveland County, Cities and towns
Cities and towns in Cleveland County
The Census Bureau estimates 303,973 residents in Cleveland County for July 1, 2025, 7,720 more than in 2020 (+2.6%). That works out to 564 people per square mile of land. Oklahoma City, the largest place on its list (719,849 residents in all), extends beyond Cleveland County, so no share of the total is worked out for it. Reported testing is thin here: 24 tests over 2008 to 2017, or 0.1 for every 1,000 residents (2025 estimate), where Oklahoma as a whole comes to 0.2.
From Oklahoma City to Etowah, CDC publishes no figure by town: each reads Cleveland County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Oklahoma Cityextends beyond Cleveland County | 719,849 | +5.4% | Counted whole |
| Norman | 130,943 | +2.2% | 43.1% |
| Moore | 63,609 | +0.9% | 20.9% |
| Noble | 7,748 | +10.3% | 2.5% |
| Purcellextends beyond Cleveland County | 7,030 | +5.8% | Counted whole |
| Slaughterville | 4,332 | +3.5% | 1.4% |
| Lexington | 2,046 | +1.7% | 0.7% |
| Etowah | 162 | +1.3% | Under 0.1% |
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 Cleveland County is counted whole, so it has no share.
Cleveland County, Homes
Homes in Cleveland County
Of Cleveland County's 123,193 homes, 71% are detached houses, against 73% across Oklahoma; 15% are in buildings of five or more homes. Much of Cleveland County is recent building: 36% of its homes have gone up since 2000 and the middle year built is 1990, against 1980 for Oklahoma. 64% 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 | Cleveland County | Oklahoma |
|---|---|---|
| Housing units | 123,193 | 1,763,036 |
| Detached houses | 71% | 73% |
| In buildings of 5 or more | 15% | 12% |
| Mobile homes | 5% | 9% |
| Built before 1960 | 7% | 21% |
| Built since 2000 | 36% | 25% |
| Middle year built | 1990 | 1980 |
| Owner-occupied | 64% | 66% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.