Short-term kit
PicoCan short-term charcoal canister radon test
- Lab fee included
Method: Charcoal
In home: 48 to 96 hours
Locations and reports
Radon Levels in Kay County, Oklahoma
EPA puts Kay County in Zone 3, its lowest radon zone, and only 25 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
Share at 4+ pCi/L
23.5%
11.5 pts above OK
- Kay
- 23.5%
- Oklahoma
- 12.0%
34 tests, 2005 to 2014
Median result
2.1pCi/L
Below action level
- Kay
- 2.1 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2005 to 2014
Tests reported
34
6th of 6 by tests
- Kay
- 34
- Tulsa
- 258
Reported to CDC before any fix, 2005 to 2014
EPA radon zone
Zone 3
Lower potential
- 1
- 2
- Zone 3
1 highest, 3 lowest
EPA predicts under 2 pCi/L indoors
Rank in Oklahoma
3 of 6
Middle half
- Kay
- 23.5%
- Delaware
- 44.7%
By share, of 6 with 30+ tests
Read a result for Kay County
Starts at Kay County's median, 2.1 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 2.1 pCi/L
Between 2 and 4 pCi/L
- Under 20 to 1.9 pCi/L
- 2 to 4consider a fix
- 4 and aboveEPA says fix it
This result is between 2 and 4 pCi/L. EPA recommends considering a fix when the level is between 2 and 4 pCi/L. Kay County's median reported result, 2005 to 2014.
The data
Kay County, At a glance
Kay 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 Kay County, 2008 to 2017, laboratory
CDC holds 25 reported tests for Kay County over the 2008 to 2017 laboratory totals, with a median of 1.9 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Kay County beside the counties around it is how this page reads it.
What these figures count
Only 25 tests were reported to CDC for Kay 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).
Kay County, Compared
Kay County radon figures, compared
Calculated by Radon411Kay County's 34 reported tests over the 2005 to 2014 laboratory totals had a middle value of 2.1 pCi/L and a maximum of 23.7 pCi/L, and 23.5% reached 4 pCi/L. Oklahoma as a whole (49 Oklahoma counties, pooled) comes to 12.0%: 11.5 points lower than here.
The newest figure, over the 2008 to 2017 laboratory totals, counts only 25 tests (28.0% at or above 4 pCi/L), too few to compare, so this reading uses the 34-test figure.
Among its state's counties it ranks 3rd of 6 Oklahoma counties with 30 or more tests for the same period. Statewide for the same period, Delaware County reported the highest share (44.7%) and Tulsa County the lowest (3.9%).
Below the action level, 17 tests (50.0%) came in under 2 pCi/L, against 70.5% statewide, and 9 tests (26.5%) fell between 2 and 4, against 17.5% statewide. CDC's ten-year totals for Kay County went from 34 tests (2005 to 2014) to 25 (2008 to 2017), the share going from 23.5% to 28.0%.
EPA's 1993 zone map puts Kay County in Zone 3, 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.
Kay County, Geology
The ground under Kay County
PredictedUSGS's geologic map puts all of Kay 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.
Kay County beside the ground around it
Across Oklahoma 0.6% of the land is rated high; none of Kay County's is. Of the 6 counties that border it, 2 have more moderate-potential ground, Cowley County, KS the most at 99.8%.
The map rates the ground, not the air in any home.
Local help
Kay County, Local resources
Radon testing and mitigation in Kay 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
Kay County, Questions
Questions about radon in Kay County
Are radon levels high in Kay County?
Over the 2008 to 2017 laboratory totals, 28.0% of the radon tests reported to CDC for Kay County, Oklahoma were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.9 pCi/L. Of 6 Oklahoma counties with 30 or more tests for the same period, 2 reported a higher share; pooled, the state comes to 12.0%.
Which counties border Kay County?
Kay County borders 6 counties: Cowley County, KS, Sumner County, KS, Noble County, OK, Grant County, OK, Osage County, OK and Garfield County, OK.
Products
Kay County, Products
Testing a home in Kay County
In Kay County, 23.5% of 34 tests reported to CDC over the 2005 to 2014 laboratory totals reached 4 pCi/L, against 12.0% pooled across Oklahoma. 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 Kay 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
RadonScan-Plus USB-powered radon monitor with Wi-Fi
- C-NRPP 2024/25: Not included
- Plug-in
- Wi-Fi
- Alarm
- Screen, app
First reading: Within 5 minutes
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Kay County, Bordering counties
Counties bordering Kay County
Calculated by Radon411- Radon levels in Grant County, OKEPA zone 3
40.0%at or above 4 pCi/L
Median 3.7 pCi/L · 5 tests · 16.5 points above Kay County
- Radon levels in Noble County, OKEPA zone 3
0.0%at or above 4 pCi/L
Median 1.1 pCi/L · 1 test · 23.5 points below Kay County
- Radon levels in Osage County, OKEPA zone 3
0.0%at or above 4 pCi/L
Median 0.9 pCi/L · 3 tests · 23.5 points below Kay County
- Radon levels in Garfield County, OKEPA zone 3
0.0%at or above 4 pCi/L
Median 2.0 pCi/L · 7 tests · 23.5 points below Kay County
- Radon levels in Cowley County, KSEPA zone 2
No CDC figure for 2005 to 2014; its page reads it against its own neighbours.
- Radon levels in Sumner County, KSEPA zone 2
No CDC figure for 2005 to 2014; its page reads it against its own neighbours.
Kay County, Cities and towns
Cities and towns in Kay County
Kay County's population has barely moved since 2020: 43,490 residents on July 1, 2025 against 43,605 then, by the Census Bureau's estimates. That works out to 47 people per square mile of land. Ponca City alone is home to 24,225 of them, 55.7% of the total. Together its 7 incorporated places hold 82.9% of those residents; the other 17.1% live outside any of them. Testing is reported here more often than across the state: CDC's 34 reported tests for 2005 to 2014 come to 0.8 for every 1,000 residents (2025 estimate), against 0.2 for Oklahoma.
From Ponca City to Kildare, CDC publishes no figure by town: each reads Kay County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Ponca City | 24,225 | −0.5% | 55.7% |
| Blackwell | 6,029 | −0.6% | 13.9% |
| Tonkawa | 2,983 | −0.9% | 6.9% |
| Newkirk | 2,246 | +0.1% | 5.2% |
| Kaw City | 321 | +1.9% | 0.7% |
| Braman | 163 | +0.6% | 0.4% |
| Kildare | 92 | +2.2% | 0.2% |
7 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).
Kay County, Homes
Homes in Kay County
Kay County is a place of houses on their own lots: 82% of its 20,923 homes are detached single-family houses, against 73% across Oklahoma. The homes are older than Oklahoma's as a whole: half were built before 1964 (1980 for Oklahoma), and 45% date from before 1960. 68% 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 | Kay County | Oklahoma |
|---|---|---|
| Housing units | 20,923 | 1,763,036 |
| Detached houses | 82% | 73% |
| In buildings of 5 or more | 6% | 12% |
| Mobile homes | 6% | 9% |
| Built before 1960 | 45% | 21% |
| Built since 2000 | 8% | 25% |
| Middle year built | 1964 | 1980 |
| Owner-occupied | 68% | 66% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.