Short-term kit
Air Chek Short-Term radon test kit you hang, lab fee included
- Lab fee included
In home: 72 to 168 hours
Locations and reports
Radon Levels in Lincoln County, Missouri
EPA puts Lincoln County in Zone 2, its middle radon zone, and only 16 radon tests from it are on file with CDC (2023). Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Share at 4+ pCi/L
33.6%
3.0 pts above MO
- Lincoln
- 33.6%
- Missouri
- 30.6%
444 tests, 2008 to 2017
Median result
2.2pCi/L
Below action level
- Lincoln
- 2.2 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
444
15th of 72 by tests
- Lincoln
- 444
- St. Louis
- 17,747
Reported to CDC before any fix, 2008 to 2017
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 Missouri
29 of 72
Middle half
- Lincoln
- 33.6%
- Atchison
- 69.9%
By share, of 72 with 30+ tests
Read a result for Lincoln County
Starts at Lincoln County's median, 2.2 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 2.2 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. Lincoln County's median reported result, 2008 to 2017.
The data
Lincoln County, At a glance
Lincoln County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Lincoln County is a
USGS geologic potential: Moderate across 97% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Lincoln County, 2023
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 40.9% |
| 2015 | 57.1% |
| 2016 | 55.6% |
| 2017 | 37.5% |
| 2018 | 61.5% |
| 2019 | 50.0% |
| 2020 | 61.5% |
| 2021 | 25.0% |
| 2022 | 70.6% |
| 2023 | 43.8% |
2023: 43.8%. Across these years the share ran from 25.0% to 70.6%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
Only 16 tests were reported to CDC for Lincoln 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).
Lincoln County, Compared
Lincoln County radon figures, compared
Calculated by Radon411In Lincoln County, about 3 in 10 reported tests over the 2008 to 2017 laboratory totals (149 of 444) were at or above EPA's action level. Against the national pool of 35.7%, the gap is 2.1 points lower. Across 115 Missouri counties pooled together, 30.6% of tests reached that level, so Lincoln County runs 3.0 points above its state.
The newest figure, in 2023, counts only 16 tests (43.8% at or above 4 pCi/L), too few to compare, so this reading uses the 444-test figure.
Of 4 neighbours with a figure, 2 reported a larger share at or above 4 pCi/L and 2 a smaller one; the spread is 12.8% (Montgomery County) to 40.0% (Pike County). By share, Lincoln County is 29th of 72 Missouri counties with 30 or more tests for the same period.
Half the tests came in under 2.2 pCi/L and half over it; the single highest reached 32.4 pCi/L. Below the action level, 198 tests (44.6%) came in under 2 pCi/L, against 41.2% statewide, and 97 tests (21.8%) fell between 2 and 4, against 28.1% statewide.
Zone 2 on EPA's map (predicted average between 2 and 4 pCi/L) and a 33.6% share point the same way here. USGS geology rates 97% of the county's land moderate radon potential. CDC also counts 20 tests taken after mitigation in Lincoln County for the same period: tests in homes where a fix was already in.
The busiest year on file was 2016, with 27 tests reported; the quietest, 2019, had 10.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Lincoln County, Geology
The ground under Lincoln County
PredictedMost of the ground under Lincoln County is one class on USGS's geologic map: 97.4% of its land is moderate radon potential, with 2.6% high. 97.4% 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 | 97.4% |
| Galesburg Plain | Illinoian glacial deposits and loess over Paleozoic sedimentary rocks. | High | 13 | 2.6% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Lincoln County beside the ground around it
On high-potential ground Lincoln County is close to Missouri as a whole: 2.6% of its land against 8.2%. Of the 5 counties that border it, 2 have more high-potential ground, Calhoun County, IL the most at 99.4%.
The map rates the ground, not the air in any home.
Local help
Lincoln County, Local resources
Radon testing and mitigation in Lincoln 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
Lincoln County, Questions
Questions about radon in Lincoln County
Are radon levels high in Lincoln County?
In 2023, 43.8% of the radon tests reported to CDC for Lincoln County, Missouri were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.8 pCi/L. Of 72 Missouri counties with 30 or more tests for the same period, 28 reported a higher share; pooled, the state comes to 30.6%.
Which counties border Lincoln County?
Lincoln County borders 5 counties: Calhoun County, IL, Warren County, MO, St. Charles County, MO, Pike County, MO and Montgomery County, MO.
Products
Lincoln County, Products
Testing a home in Lincoln County
In Lincoln County, 33.6% of 444 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 30.6% pooled across Missouri. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Lincoln 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
RadonScan USB-powered radon monitor with a color screen
- C-NRPP 2024/25: Not included
- Plug-in
- Alarm
- Screen
First reading: Within 5 minutes
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Lincoln County, Bordering counties
Counties bordering Lincoln County
Calculated by Radon411- Radon levels in Calhoun County, ILEPA zone 1
66.7%at or above 4 pCi/L
Median 4.5 pCi/L · 6 tests · 33.1 points above Lincoln County
- Radon levels in Pike County, MOEPA zone 2
40.0%at or above 4 pCi/L
Median 2.9 pCi/L · 35 tests · 6.4 points above Lincoln County
- Radon levels in Warren County, MOEPA zone 2
36.8%at or above 4 pCi/L
Median 2.7 pCi/L · 285 tests · 3.2 points above Lincoln County
- Radon levels in St. Charles County, MOEPA zone 2
26.5%at or above 4 pCi/L
Median 2.2 pCi/L · 7,001 tests · 7.1 points below Lincoln County
- Radon levels in Montgomery County, MOEPA zone 2
12.8%at or above 4 pCi/L
Median 1.6 pCi/L · 47 tests · 20.8 points below Lincoln County
Lincoln County, Cities and towns
Cities and towns in Lincoln County
Lincoln County is growing: the Census Bureau puts it at 66,676 residents on July 1, 2025, up 11.4% from 59,842 in 2020. That works out to 106 people per square mile of land. Its largest town, Troy, has 15,201 residents, 22.8% of the total. CDC's 444 reported tests for 2008 to 2017 work out to 6.7 per 1,000 residents (2025 estimate), close to Missouri's 9.3.
From Troy to Cave, CDC publishes no figure by town: each reads Lincoln County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Troy | 15,201 | +18.6% | 22.8% |
| Moscow Mills | 4,388 | +28.1% | 6.6% |
| Elsberry | 2,108 | +8.8% | 3.2% |
| Winfield | 1,660 | +8.1% | 2.5% |
| Hawk Point | 772 | +11.4% | 1.2% |
| Old Monroe | 281 | +12.9% | 0.4% |
| Silex | 266 | +7.7% | 0.4% |
| Fountain N' Lakes | 181 | +11.0% | 0.3% |
| Chain of Rocks | 104 | +8.3% | 0.2% |
| Foley | 97 | +7.8% | 0.1% |
| Truxton | 71 | +10.9% | 0.1% |
| Whiteside | 63 | +8.6% | Under 0.1% |
- Cave
13 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).
Lincoln County, Homes
Homes in Lincoln County
Of Lincoln County's 23,600 homes, 75% are detached houses, against 70% across Missouri; 16% are mobile homes. Much of Lincoln County is recent building: 42% of its homes have gone up since 2000 and the middle year built is 1996, against 1978 for Missouri. Owners live in 78% of the occupied homes (Missouri: 68%), so for most households a test and a fix are their own to order.
| Homes | Lincoln County | Missouri |
|---|---|---|
| Housing units | 23,600 | 2,809,501 |
| Detached houses | 75% | 70% |
| In buildings of 5 or more | 3% | 13% |
| Mobile homes | 16% | 5% |
| Built before 1960 | 10% | 28% |
| Built since 2000 | 42% | 21% |
| Middle year built | 1996 | 1978 |
| Owner-occupied | 78% | 68% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.