Short-term kit
RA400 short-term liquid scintillation radon test kit, lab fee included
- Lab fee included
Method: Liquid scintillation
In home: 48 to 96 hours
Locations and reports
Radon Levels in Caddo County, Oklahoma
EPA puts Caddo 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, 61 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
- Caddo
- 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 Caddo 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
Caddo County, At a glance
Caddo 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 Caddo County. Oklahoma County, 61 miles away, is the nearest county with a figure over the 2006 to 2015 laboratory totals.
Caddo County, Compared
Caddo County radon figures, compared
Calculated by Radon411CDC's county radon counts over the 2006 to 2015 laboratory totals cover 53 Oklahoma counties, and Caddo 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 (61 miles away) at 8.9%, Tulsa County (152 miles away) at 6.0% and Washington County (175 miles away) at 11.3%. 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 Caddo 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.
Caddo County, Geology
The ground under Caddo County
PredictedUSGS's geologic map puts all of Caddo County's mapped land in one class: low radon potential. 98.1% 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 | 98.1% |
| Wichita Mountains | Granite, rhyolite, abd gabbro. | Low | 6 | 1.9% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Caddo County beside the ground around it
Across Oklahoma 0.6% of the land is rated high; none of Caddo County's is. None of the 7 counties that border it has any moderate-potential ground either.
The map rates the ground, not the air in any home.
Local help
Caddo County, Local resources
Radon testing and mitigation in Caddo 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
Caddo County, Questions
Questions about radon in Caddo County
Are radon levels high in Caddo County?
No CDC testing statistics are published here for Caddo County, Oklahoma yet. Of the 5 nearest counties with a figure, within 218 miles, the share of tests at or above 4 pCi/L runs from 6.0% to 44.7%.
Which counties border Caddo County?
Caddo County borders 7 counties: Grady County, Canadian County, Comanche County, Kiowa County, Washita County, Blaine County and Custer County.
Products
Caddo County, Products
Testing a home in Caddo County
No CDC figure names Caddo County; the nearest county with one, Oklahoma County (61 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 Caddo 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
Wave Radon battery smart radon 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
Caddo County, Bordering counties
Counties bordering Caddo 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 Comanche CountyEPA zone 3
9.1%at or above 4 pCi/L
Median 0.6 pCi/L · 11 tests
- Radon levels in Grady CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 0.6 pCi/L · 2 tests
- Radon levels in Washita CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 2.8 pCi/L · 3 tests
- 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 Kiowa CountyEPA zone 3
No CDC figure for 2006 to 2015; its page reads it against its own neighbours.
- Radon levels in Blaine CountyEPA zone 3
No CDC figure for 2006 to 2015; its page reads it against its own neighbours.
Caddo County, Cities and towns
Cities and towns in Caddo County
About 26,130 people live in Caddo County by the Census Bureau's estimate for July 1, 2025, 773 fewer than in 2020 (−2.9%). That works out to 20 people per square mile of land. Its largest town, Anadarko, has 5,448 residents, 20.8% of the total. CDC publishes no radon test count for Caddo County; across Oklahoma its counts for 2006 to 2015 come to 0.2 tests for every 1,000 residents (2025 estimate).
From Anadarko to Bridgeport, CDC publishes no figure by town: each reads Caddo County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Anadarko | 5,448 | −4.9% | 20.8% |
| Hinton | 4,975 | +0.9% | 19.0% |
| Carnegie | 1,366 | −3.9% | 5.2% |
| Apache | 996 | −4.0% | 3.8% |
| Hydroextends beyond Caddo County | 901 | −2.6% | Counted whole |
| Cyril | 797 | −3.6% | 3.1% |
| Fort Cobb | 498 | −3.9% | 1.9% |
| Binger | 434 | −3.6% | 1.7% |
| Cement | 419 | −3.9% | 1.6% |
| Eakly | 284 | −3.4% | 1.1% |
| Gracemont | 271 | −3.6% | 1.0% |
| Lookeba | 109 | −2.7% | 0.4% |
- Bridgeport
13 incorporated places, as listed in the U.S. Census Bureau’s 2020 place reference files. “(part)” marks a place that extends into another county. Residents: U.S. Census Bureau population estimates for July 1, 2025 (Vintage 2025). A place that extends beyond Caddo County is counted whole, so it has no share.
Caddo County, Homes
Homes in Caddo County
Caddo County is a place of houses on their own lots: 82% of its 11,577 homes are detached single-family houses, against 73% across Oklahoma. The homes are older than Oklahoma's as a whole: half were built before 1972 (1980 for Oklahoma), and 31% date from before 1960. 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 | Caddo County | Oklahoma |
|---|---|---|
| Housing units | 11,577 | 1,763,036 |
| Detached houses | 82% | 73% |
| In buildings of 5 or more | 2% | 12% |
| Mobile homes | 13% | 9% |
| Built before 1960 | 31% | 21% |
| Built since 2000 | 13% | 25% |
| Middle year built | 1972 | 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.