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 Doniphan County, Kansas
EPA puts Doniphan County in Zone 2, its middle radon zone, and only 5 radon tests from it are on file with CDC (2022). Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Share at 4+ pCi/L
0.0%
31.8 pts below KS
- Doniphan
- 0.0%
- Kansas
- 31.8%
33 tests, 2021
Median result
1.7pCi/L
Below action level
- Doniphan
- 1.7 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2021
Tests reported
33
61st of 62 by tests
- Doniphan
- 33
- Johnson
- 25,860
Reported to CDC before any fix, 2021
EPA radon zone
Zone 2
Moderate potential
- 1
- Zone 2
- 3
1 highest, 3 lowest
EPA predicts 2 to 4 pCi/L indoors
Rank in Kansas
62 of 62
Lowest quarter
- Doniphan
- 0.0%
- Norton
- 93.8%
By share, of 62 with 30+ tests
Read a result for Doniphan County
Starts at Doniphan County's median, 1.7 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 1.7 pCi/L
Below 2 pCi/L
- Under 20 to 1.9 pCi/L
- 2 to 4consider a fix
- 4 and aboveEPA says fix it
This result is below 2 pCi/L, the level at which EPA says a fix should be considered. Doniphan County's median reported result, 2021.
The data
Doniphan County, At a glance
Doniphan County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Doniphan County is a
USGS geologic potential: High across 100% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Doniphan County, 2022
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2016 | 77.3% |
| 2017 | 50.0% |
| 2018 | 75.0% |
| 2019 | 60.0% |
| 2020 | 37.5% |
| 2021 | 0.0% |
| 2022 | 100.0% |
2022: 100.0%. Across these years the share ran from 0.0% to 100.0%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
Only 5 tests were reported to CDC for Doniphan County over 2022, 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: 2022. Measured data period: 2016 to 2022 (every CDC figure on file).
Doniphan County, Compared
Doniphan County radon figures, compared
Calculated by Radon411Only 0 of 33 radon tests reported for Doniphan County in 2021 reached 4 pCi/L (0.0%). The median result, 1.7 pCi/L, sits below 2, well under EPA's 4 pCi/L action level, and the top reported result was 2.0 pCi/L.
The newest figure, in 2022, counts only 5 tests (100.0% at or above 4 pCi/L), too few to compare, so this reading uses the 33-test figure.
Across 96 Kansas counties pooled together, 31.8% of tests reached that level, so Doniphan County runs 31.8 points below its state. Against the national pool of 24.4%, the gap is 24.4 points lower. Its place in the state: 62nd of 62 Kansas counties with 30 or more tests for the same period.
The reported tests do not follow EPA's Zone 2 label for Doniphan County (predicted average between 2 and 4 pCi/L): 0.0% of them reached 4 pCi/L, fewer than that label suggests. Of 3 neighbours with a figure, all 3 reported a larger share at or above 4 pCi/L; the spread is 28.6% (Brown County) to 44.4% (Atchison County).
Below the action level, 27 tests (81.8%) came in under 2 pCi/L, against 45.3% statewide, and 6 tests (18.2%) fell between 2 and 4, against 22.9% statewide. USGS geology rates 100% of the county's land high radon potential.
The busiest year on file was 2021, with 33 tests reported; the quietest, 2022, had 5.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Doniphan County, Geology
The ground under Doniphan County
PredictedUSGS's geologic map puts all of Doniphan County's mapped land in one class: high radon potential. 99.3% of it lies in the area the map calls Glacial Drift, to which USGS gives a radon index of 12, in the high band (12 to 17).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Glacial Drift | Glacial drift and loess of varying thickness, largely locally derived from underlying and nearby Paleozoic sedimentary rocks. | High | 12 | 99.3% |
| Northwestern Dissected Till Plains | Pennsylvanian shales covered by thick loess. | High | 13 | 0.7% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Doniphan County beside the ground around it
Doniphan County has more high-potential ground than Kansas as a whole: 100% of its land against 59.9%. Of the 6 counties that border it, none has as large a share of high-potential ground; Buchanan County, MO comes nearest at 100%.
The map rates the ground, not the air in any home.
Local help
Doniphan County, Local resources
Radon testing and mitigation in Doniphan County
- Kansas Radon ProgramKansas Radon Program answers questions about testing, mitigation and the rules in Kansas.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
- Professionals in Kansas178 professionals are listed in Kansas.
What Kansas's program says
- Phone
- (800) 693-5343
What it means
Doniphan County, Questions
Questions about radon in Doniphan County
Are radon levels high in Doniphan County?
In 2022, 100.0% of the radon tests reported to CDC for Doniphan County, Kansas were at or above 4 pCi/L, and the median reported pre-mitigation result was 21.9 pCi/L. Of 62 Kansas counties with 30 or more tests for the same period, 61 reported a higher share; pooled, the state comes to 31.8%.
Which counties border Doniphan County?
Doniphan County borders 6 counties: Holt County, MO, Buchanan County, MO, Andrew County, MO, Atchison County, KS, Brown County, KS and Richardson County, NE.
Products
Doniphan County, Products
Testing a home in Doniphan County
In Doniphan County, 0.0% of 33 tests reported to CDC in 2021 reached 4 pCi/L, against 31.8% pooled across Kansas. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Doniphan County; a long-term test tells the year-round average.
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
View Plus radon and air quality monitor
- C-NRPP 2024/25: Approved
- Battery
- Wi-Fi, Bluetooth
- Screen, app
Method: Alpha spectrometry
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Doniphan County, Bordering counties
Counties bordering Doniphan County
Calculated by Radon411- Radon levels in Buchanan County, MOEPA zone 1
57.1%at or above 4 pCi/L
Median 4.7 pCi/L · 14 tests · 57.1 points above Doniphan County
- Radon levels in Atchison County, KSEPA zone 1
44.4%at or above 4 pCi/L
Median 3.5 pCi/L · 162 tests · 44.4 points above Doniphan County
- Radon levels in Richardson County, NEEPA zone 1
36.6%at or above 4 pCi/L
Median 2.9 pCi/L · 402 tests · 36.6 points above Doniphan County
- Radon levels in Andrew County, MOEPA zone 1
33.3%at or above 4 pCi/L
Median 1.6 pCi/L · 3 tests · 33.3 points above Doniphan County
- Radon levels in Brown County, KSEPA zone 1
28.6%at or above 4 pCi/L
Median 2.0 pCi/L · 42 tests · 28.6 points above Doniphan County
- Radon levels in Holt County, MOEPA zone 1
No CDC figure for 2021; its page reads it against its own neighbours.
Doniphan County, Cities and towns
Cities and towns in Doniphan County
The Census Bureau estimates 7,594 residents in Doniphan County for July 1, 2025, 123 more than in 2020 (+1.6%). That works out to 19 people per square mile of land. No town dominates: Wathena, the largest, has 1,273 residents, 16.8% of the total. Together its 8 incorporated places hold 61.9% of those residents; the other 38.1% live outside any of them. Reported testing is thin here: 33 tests over 2021, or 4.3 for every 1,000 residents (2025 estimate), where Kansas as a whole comes to 23.5.
From Wathena to Leona, CDC publishes no figure by town: each reads Doniphan County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Wathena | 1,273 | +1.8% | 16.8% |
| Elwood | 1,137 | +2.2% | 15.0% |
| Troy | 985 | +2.3% | 13.0% |
| Highland | 935 | +1.4% | 12.3% |
| Denton | 129 | Level | 1.7% |
| White Cloud | 118 | +1.7% | 1.6% |
| Severance | 79 | +1.3% | 1.0% |
| Leona | 43 | +7.5% | 0.6% |
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).
Doniphan County, Homes
Homes in Doniphan County
Doniphan County is a place of houses on their own lots: 80% of its 3,375 homes are detached single-family houses, against 72% across Kansas. Half of its homes were built before 1970, close to Kansas' 1975: 43% date from before 1960 and 15% from 2000 or later. Owners live in 82% of the occupied homes (Kansas: 67%), so for most households a test and a fix are their own to order.
| Homes | Doniphan County | Kansas |
|---|---|---|
| Housing units | 3,375 | 1,285,221 |
| Detached houses | 80% | 72% |
| In buildings of 5 or more | 2% | 13% |
| Mobile homes | 11% | 4% |
| Built before 1960 | 43% | 33% |
| Built since 2000 | 15% | 20% |
| Middle year built | 1970 | 1975 |
| Owner-occupied | 82% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.