Short-term kitKidde
442020 short-term charcoal radon test kit
- Lab fee included
Method: Charcoal
In home: 3 days
Locations and reports
Radon Levels in Chariton County, Missouri
EPA puts Chariton County in Zone 2, its middle radon zone, and only 1 radon test from it is on file with CDC (2023). Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Highest bordering
49.1%
Saline County
- Saline
- 49.1%
- Randolph
- 17.2%
6 of 7 neighbours have 30+ tests, 2008 to 2017
Nearest county
17.2%
Randolph County, 25 miles
- Randolph
- 17.2%
- Missouri
- 30.6%
Share at 4+ pCi/L, 58 tests, 2008 to 2017
Ground above low
100.0%
5.8 pts above Missouri
- Chariton
- 100.0%
- Missouri
- 94.2%
Share of land USGS rates moderate or high potential
Tests reported
17
Too few for a share
- Chariton
- 17
- Needed
- 30
2007 to 2016, laboratory
EPA radon zone
Zone 2
Moderate potential
- 1
- Zone 2
- 3
1 highest, 3 lowest
EPA predicts 2 to 4 pCi/L indoors
Read a result for Chariton 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
Chariton County, At a glance
Chariton County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Chariton County is a
USGS geologic potential: Moderate across 100% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Chariton County, 2023
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 0.0% |
| 2015 | 0.0% |
| 2016 | 33.3% |
| 2021 | 0.0% |
| 2022 | 100.0% |
| 2023 | 100.0% |
2023: 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 1 test was reported to CDC for Chariton County over 2023, 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: 2023. Measured data period: 2005 to 2023 (every CDC figure on file).
Chariton County, Compared
Chariton County radon figures, compared
Calculated by Radon411CDC's largest figure for Chariton County rests on 17 tests over the 2007 to 2016 laboratory totals, 2 of them at or above 4 pCi/L, so each test moves its share by 5.9 points and no rank or comparison is drawn from it. Results reached as high as 17.6 pCi/L, with a middle value of 2.0 pCi/L.
Of the counties bordering it, 6 have a figure over the 2008 to 2017 laboratory totals: Saline County reported the largest share at or above 4 pCi/L, 49.1%, and Randolph County the smallest, 17.2%, with Howard County at 43.5%, Livingston County at 22.4% and Macon County at 19.4% between. Farther out, Cooper County (47 miles away) at 41.1% and Boone County (50 miles away) at 21.7% have figures too. Pooled across 115 Missouri counties, 30.6% of reported tests reached that level; across every county in the country with a figure, 35.7%.
Statewide for the same period, Atchison County reported the highest share (69.9%) and Vernon County the lowest (8.8%). EPA's 1993 map puts Chariton County in Zone 2, its middle label: a predicted county average between 2 and 4 pCi/L. USGS geology rates 100% of the county's land moderate radon potential.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Chariton County, Geology
The ground under Chariton County
PredictedUSGS's geologic map puts all of Chariton County's mapped land in one class: moderate radon potential. All of it lies in the area the map calls Dissected Till Plains, to which USGS gives a radon index of 11, in the moderate band (9 to 11).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Dissected Till Plains | Till-covered Pennsylvanian sandstone, shale, and limestone. | Moderate | 11 | 99.9% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Chariton County beside the ground around it
Across Missouri 8.2% of the land is rated high; none of Chariton County's is. Of the 7 counties that border it, none has as large a share of moderate-potential ground; Carroll County comes nearest at 100%.
The map rates the ground, not the air in any home.
Local help
Chariton County, Local resources
Radon testing and mitigation in Chariton 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
Chariton County, Questions
Questions about radon in Chariton County
Are radon levels high in Chariton County?
In 2023, 100.0% of the radon tests reported to CDC for Chariton County, Missouri were at or above 4 pCi/L, and the median reported pre-mitigation result was 11.4 pCi/L. Of the counties bordering it, 6 have a figure over the 2008 to 2017 laboratory totals: Saline County reported the largest share at or above 4 pCi/L, 49.1%, and Randolph County the smallest, 17.2%, with Howard County at 43.5%, Livingston County at 22.4% and Macon County at 19.4% between.
Which counties border Chariton County?
Chariton County borders 7 counties: Saline County, Randolph County, Howard County, Carroll County, Linn County, Macon County and Livingston County.
Products
Chariton County, Products
Testing a home in Chariton County
No CDC figure names Chariton County; the nearest county with one, Randolph County (25 miles away), reported 17.2% of its tests at or above 4 pCi/L over the 2008 to 2017 laboratory totals, the only reading nearby until a test of this home. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Chariton County; a long-term test tells the year-round average.
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
RadonEye RD200 plug-in continuous radon monitor
- C-NRPP 2024/25: Approved
- Plug-in
- Bluetooth
- Alarm
- Screen, app
Method: Ion chamber
First reading: Within 10 minutes
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Chariton County, Bordering counties
Counties bordering Chariton County
Calculated by Radon411- Radon levels in Saline CountyEPA zone 2
49.1%at or above 4 pCi/L
Median 3.7 pCi/L · 55 tests
- Radon levels in Howard CountyEPA zone 2
43.5%at or above 4 pCi/L
Median 3.5 pCi/L · 62 tests
- Radon levels in Carroll CountyEPA zone 2
33.3%at or above 4 pCi/L
Median 2.7 pCi/L · 18 tests
- Radon levels in Livingston CountyEPA zone 2
22.4%at or above 4 pCi/L
Median 2.1 pCi/L · 49 tests
- Radon levels in Macon CountyEPA zone 2
19.4%at or above 4 pCi/L
Median 1.7 pCi/L · 36 tests
- Radon levels in Linn CountyEPA zone 2
18.9%at or above 4 pCi/L
Median 1.8 pCi/L · 37 tests
- Radon levels in Randolph CountyEPA zone 2
17.2%at or above 4 pCi/L
Median 1.8 pCi/L · 58 tests
Chariton County, Cities and towns
Cities and towns in Chariton County
Chariton County's population has barely moved since 2020: 7,377 residents on July 1, 2025 against 7,386 then, by the Census Bureau's estimates. Spread over its land, that is 9.8 people to the square mile. Marceline, the largest place on its list (2,116 residents in all), extends beyond Chariton County, so no share of the total is worked out for it. Reported testing is thin here: 17 tests over 2007 to 2016, or 2.3 for every 1,000 residents (2025 estimate), where Missouri as a whole comes to 8.8.
From Marceline to Dalton, CDC publishes no figure by town: each reads Chariton County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Marcelineextends beyond Chariton County | 2,116 | −0.6% | Counted whole |
| Salisbury | 1,564 | +0.1% | 21.2% |
| Glasgowextends beyond Chariton County | 1,080 | −0.7% | Counted whole |
| Brunswick | 798 | −0.5% | 10.8% |
| Keytesville | 446 | Level | 6.0% |
| Mendon | 164 | +0.6% | 2.2% |
| Sumner | 81 | +1.3% | 1.1% |
| Rothville | 62 | Level | 0.8% |
| Triplett | 39 | Level | 0.5% |
| Dalton | 8 | Level | 0.1% |
10 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 Chariton County is counted whole, so it has no share.
Chariton County, Homes
Homes in Chariton County
Chariton County is a place of houses on their own lots: 82% of its 3,797 homes are detached single-family houses, against 70% across Missouri. The homes are older than Missouri's as a whole: half were built before 1969 (1978 for Missouri), and 37% date from before 1960. Owners live in 81% of the occupied homes (Missouri: 68%), so for most households a test and a fix are their own to order.
| Homes | Chariton County | Missouri |
|---|---|---|
| Housing units | 3,797 | 2,809,501 |
| Detached houses | 82% | 70% |
| In buildings of 5 or more | 2% | 13% |
| Mobile homes | 10% | 5% |
| Built before 1960 | 37% | 28% |
| Built since 2000 | 10% | 21% |
| Middle year built | 1969 | 1978 |
| Owner-occupied | 81% | 68% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.