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
Locations and reports
Radon Levels in Clinton County, Missouri
EPA puts Clinton County in Zone 1, its highest radon zone, and only 4 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
38.1%
7.5 pts above MO
- Clinton
- 38.1%
- Missouri
- 30.6%
105 tests, 2008 to 2017
Median result
2.8pCi/L
Below action level
- Clinton
- 2.8 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
105
38th of 72 by tests
- Clinton
- 105
- St. Louis
- 17,747
Reported to CDC before any fix, 2008 to 2017
EPA radon zone
Zone 1
Highest potential
- Zone 1
- 2
- 3
1 highest, 3 lowest
EPA predicts over 4 pCi/L indoors
Rank in Missouri
20 of 72
Middle half
- Clinton
- 38.1%
- Atchison
- 69.9%
By share, of 72 with 30+ tests
Read a result for Clinton County
Starts at Clinton County's median, 2.8 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 2.8 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. Clinton County's median reported result, 2008 to 2017.
The data
Clinton County, At a glance
Clinton County at a glance
Predicted: EPA radon zone
EPA Zone 1: highest predicted potential
EPA puts all of Clinton County in
USGS geologic potential: High across 67% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Clinton County, 2022
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 42.9% |
| 2015 | 0.0% |
| 2016 | 20.0% |
| 2017 | 33.3% |
| 2018 | 33.3% |
| 2019 | 0.0% |
| 2020 | 0.0% |
| 2022 | 0.0% |
2022: 0.0%. Across these years the share ran from 0.0% to 42.9%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
Only 4 tests were reported to CDC for Clinton 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: 2005 to 2022 (every CDC figure on file).
Clinton County, Compared
Clinton County radon figures, compared
Calculated by Radon411In Clinton County, about 4 in 10 reported tests over the 2008 to 2017 laboratory totals (40 of 105) were at or above EPA's action level. Against the national pool of 35.7%, the gap is 2.4 points higher. Across 115 Missouri counties pooled together, 30.6% of tests reached that level, so Clinton County runs 7.5 points above its state.
The newest figure, in 2022, counts only 4 tests (0.0% at or above 4 pCi/L), too few to compare, so this reading uses the 105-test figure.
Of 5 neighbours with a figure, 3 reported a larger share at or above 4 pCi/L and 2 a smaller one; the spread is 24.2% (DeKalb County) to 52.9% (Buchanan County). By share, Clinton County is 20th of 72 Missouri counties with 30 or more tests for the same period.
Half the tests came in under 2.8 pCi/L and half over it; the single highest reached 127.9 pCi/L. Below the action level, 37 tests (35.2%) came in under 2 pCi/L, against 41.2% statewide, and 28 tests (26.7%) fell between 2 and 4, against 28.1% statewide.
Zone 1 on EPA's map (predicted average above 4 pCi/L) and a 38.1% share point the same way here. USGS geology rates 67% of the county's land high radon potential.
The busiest year on file was 2014, with 21 tests reported; the quietest, 2020, had 2.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Clinton County, Geology
The ground under Clinton County
PredictedUSGS's geologic map splits Clinton County: 67.2% of its land is high radon potential and 32.8% moderate. The map puts 67.2% of Clinton County in the area it calls Northwestern Dissected Till Plains and 32.8% in Dissected Till Plains. USGS gives the first a radon index of 13, in the high band (12 to 17), and the second 11, in the moderate band (9 to 11).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Northwestern Dissected Till Plains | Pennsylvanian shales covered by thick loess. | High | 13 | 67.2% |
| Dissected Till Plains | Till-covered Pennsylvanian sandstone, shale, and limestone. | Moderate | 11 | 32.8% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Clinton County beside the ground around it
Clinton County has more high-potential ground than Missouri as a whole: 67.2% of its land against 8.2%. Of the 6 counties that border it, 3 have more high-potential ground, Buchanan County the most at 100%.
The map rates the ground, not the air in any home.
Local help
Clinton County, Local resources
Radon testing and mitigation in Clinton County
- Missouri Radon ProgramMissouri Radon Program, run by Missouri Department of Health and Senior Services, offers free or discounted test kits, and answers questions about testing and mitigation in Missouri.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsThe program says:
Free radon test kits are available for Missouri residents (limit one per household).
- Compare kits
- Professionals in Missouri27 professionals are listed in Missouri.
What Missouri's program says
- Phone
- 573-751-6102
- radon@health.mo.gov
What it means
Clinton County, Questions
Questions about radon in Clinton County
Are radon levels high in Clinton County?
In 2022, 0.0% of the radon tests reported to CDC for Clinton County, Missouri were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.3 pCi/L. Of 72 Missouri counties with 30 or more tests for the same period, 19 reported a higher share; pooled, the state comes to 30.6%.
Which counties border Clinton County?
Clinton County borders 6 counties: DeKalb County, Clay County, Buchanan County, Caldwell County, Platte County and Ray County.
Products
Clinton County, Products
Testing a home in Clinton County
In Clinton County, 38.1% of 105 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 30.6% pooled across Missouri. In Zone 1 the year-round level in Clinton County is the one to know: a long-term test (more than 90 days) or a monitor, with a short-term kit for a first answer.
Test kits and monitors3
See every kit and monitor
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
Short-term kit
Air Chek Short-Term radon test kit you hang, lab fee included
- Lab fee included
In home: 72 to 168 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Clinton County is in EPA Zone 1, the highest predicted radon potential. Best radon monitors for Zone 1 counties like Clinton County
Explore
Clinton County, Bordering counties
Counties bordering Clinton County
Calculated by Radon411- Radon levels in Buchanan CountyEPA zone 1
52.9%at or above 4 pCi/L
Median 4.2 pCi/L · 575 tests · 14.8 points above Clinton County
- Radon levels in Clay CountyEPA zone 1
39.2%at or above 4 pCi/L
Median 3.1 pCi/L · 3,438 tests · 1.1 points above Clinton County
- Radon levels in Ray CountyEPA zone 2
38.9%at or above 4 pCi/L
Median 2.5 pCi/L · 108 tests · 0.8 points above Clinton County
- Radon levels in Platte CountyEPA zone 1
37.8%at or above 4 pCi/L
Median 3.0 pCi/L · 1,789 tests · 0.3 points below Clinton County
- Radon levels in DeKalb CountyEPA zone 2
24.2%at or above 4 pCi/L
Median 2.3 pCi/L · 33 tests · 13.9 points below Clinton County
- Radon levels in Caldwell CountyEPA zone 2
6.3%at or above 4 pCi/L
Median 1.5 pCi/L · 16 tests · 31.8 points below Clinton County
Clinton County, Cities and towns
Cities and towns in Clinton County
The Census Bureau estimates 21,661 residents in Clinton County for July 1, 2025, 447 more than in 2020 (+2.1%). That works out to 52 people per square mile of land. Cameron, the largest place on its list (7,341 residents in all), extends beyond Clinton County, so no share of the total is worked out for it. Reported testing is thin here: 105 tests over 2008 to 2017, or 4.8 for every 1,000 residents (2025 estimate), where Missouri as a whole comes to 9.3.
From Cameron to Turney, CDC publishes no figure by town: each reads Clinton County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Cameronextends beyond Clinton County | 7,341 | −19.5% | Counted whole |
| Lathrop | 2,253 | −0.7% | 10.4% |
| Plattsburg | 2,239 | +0.6% | 10.3% |
| Gowerextends beyond Clinton County | 1,514 | −1.1% | Counted whole |
| Trimble | 659 | +14.6% | 3.0% |
| Holtextends beyond Clinton County | 482 | +0.8% | Counted whole |
| Osbornextends beyond Clinton County | 369 | −0.8% | Counted whole |
| Turney | 125 | +5.0% | 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). A place that extends beyond Clinton County is counted whole, so it has no share.
Clinton County, Homes
Homes in Clinton County
Clinton County is a place of houses on their own lots: 82% of its 9,019 homes are detached single-family houses, against 70% across Missouri. Half of its homes were built before 1978, close to Missouri's 1978: 26% date from before 1960 and 26% from 2000 or later. Owners live in 76% of the occupied homes (Missouri: 68%), so for most households a test and a fix are their own to order.
| Homes | Clinton County | Missouri |
|---|---|---|
| Housing units | 9,019 | 2,809,501 |
| Detached houses | 82% | 70% |
| In buildings of 5 or more | 3% | 13% |
| Mobile homes | 4% | 5% |
| Built before 1960 | 26% | 28% |
| Built since 2000 | 26% | 21% |
| Middle year built | 1978 | 1978 |
| Owner-occupied | 76% | 68% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.