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 Lafayette County, Missouri
EPA puts Lafayette County in Zone 2, its middle radon zone, and only 4 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
47.6%
16.8 pts above MO
- Lafayette
- 47.6%
- Missouri
- 30.8%
185 tests, 2007 to 2016
Median result
3.5pCi/L
Below action level
- Lafayette
- 3.5 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2007 to 2016
Tests reported
185
25th of 72 by tests
- Lafayette
- 185
- St. Louis
- 16,567
Reported to CDC before any fix, 2007 to 2016
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
5 of 72
Top quarter
- Lafayette
- 47.6%
- Atchison
- 70.5%
By share, of 72 with 30+ tests
Read a result for Lafayette County
Starts at Lafayette County's median, 3.5 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 3.5 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. Lafayette County's median reported result, 2007 to 2016.
The data
Lafayette County, At a glance
Lafayette County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Lafayette 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 Lafayette County, 2023
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 60.0% |
| 2015 | 43.8% |
| 2016 | 40.0% |
| 2017 | 55.6% |
| 2018 | 33.3% |
| 2019 | 25.0% |
| 2020 | 33.3% |
| 2021 | 50.0% |
| 2022 | 71.4% |
| 2023 | 0.0% |
2023: 0.0%. Across these years the share ran from 0.0% to 71.4%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
Only 4 tests were reported to CDC for Lafayette 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).
Lafayette County, Compared
Lafayette County radon figures, compared
Calculated by Radon411In Lafayette County, about 5 in 10 reported tests over the 2007 to 2016 laboratory totals (88 of 185) were at or above EPA's action level. Against the national pool of 35.8%, the gap is 11.8 points higher. Across 115 Missouri counties pooled together, 30.8% of tests reached that level, so Lafayette County runs 16.8 points above its state.
The newest figure, in 2023, counts only 4 tests (0.0% at or above 4 pCi/L), too few to compare, so this reading uses the 185-test figure.
Of 5 neighbours with a figure, none reported a larger share at or above 4 pCi/L; the spread is 25.4% (Johnson County) to 45.3% (Saline County). By share, Lafayette County is 5th of 72 Missouri counties with 30 or more tests for the same period.
Half the tests came in under 3.5 pCi/L and half over it; the single highest reached 38.1 pCi/L. Below the action level, 50 tests (27.0%) came in under 2 pCi/L, against 41.2% statewide, and 47 tests (25.4%) fell between 2 and 4, against 27.9% statewide.
Zone 2 on EPA's map (predicted average between 2 and 4 pCi/L) and a 47.6% share point the same way here. USGS geology rates 100% of the county's land moderate radon potential. CDC also counts 12 tests taken after mitigation in Lafayette County for the same period: tests in homes where a fix was already in.
The busiest year on file was 2015, with 16 tests reported; the quietest, 2021, had 2.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Lafayette County, Geology
The ground under Lafayette County
PredictedUSGS's geologic map puts all of Lafayette County's mapped land in one class: moderate radon potential. 95.8% of it lies in the area the map calls Osage 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 |
|---|---|---|---|---|
| Osage Plains | Ordovician dolomite, sandstone, limestone, and shale. | Moderate | 11 | 95.8% |
| Dissected Till Plains | Till-covered Pennsylvanian sandstone, shale, and limestone. | Moderate | 11 | 4.2% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Lafayette County beside the ground around it
Across Missouri 8.2% of the land is rated high; none of Lafayette County's is. Of the 6 counties that border it, 1 has more high-potential ground, Jackson County the most at 69.5%.
The map rates the ground, not the air in any home.
Local help
Lafayette County, Local resources
Radon testing and mitigation in Lafayette County
Listed radon businesses with an address in Lafayette 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.
Listed radon professionals by town: Odessa
What Missouri's program says
- Phone
- 573-751-6102
- radon@health.mo.gov
What it means
Lafayette County, Questions
Questions about radon in Lafayette County
Are radon levels high in Lafayette County?
In 2023, 0.0% of the radon tests reported to CDC for Lafayette County, Missouri were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.7 pCi/L. Of 72 Missouri counties with 30 or more tests for the same period, 4 reported a higher share; pooled, the state comes to 30.8%.
Which counties border Lafayette County?
Lafayette County borders 6 counties: Johnson County, Ray County, Jackson County, Carroll County, Pettis County and Saline County.
Products
Lafayette County, Products
Testing a home in Lafayette County
In Lafayette County, 47.6% of 185 tests reported to CDC over the 2007 to 2016 laboratory totals reached 4 pCi/L, against 30.8% pooled across Missouri. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Lafayette 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
RM-63Pro rechargeable radon monitor with a touchscreen
- C-NRPP 2024/25: Not included
- Battery
- Alarm
- Screen
Method: Semiconductor sensor
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
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Lafayette County, Bordering counties
Counties bordering Lafayette County
Calculated by Radon411- Radon levels in Saline CountyEPA zone 2
45.3%at or above 4 pCi/L
Median 3.0 pCi/L · 53 tests · 2.3 points below Lafayette County
- Radon levels in Jackson CountyEPA zone 1
42.1%at or above 4 pCi/L
Median 3.2 pCi/L · 6,388 tests · 5.5 points below Lafayette County
- Radon levels in Pettis CountyEPA zone 2
42.1%at or above 4 pCi/L
Median 3.3 pCi/L · 126 tests · 5.5 points below Lafayette County
- Radon levels in Ray CountyEPA zone 2
34.0%at or above 4 pCi/L
Median 2.3 pCi/L · 97 tests · 13.6 points below Lafayette County
- Radon levels in Carroll CountyEPA zone 2
26.7%at or above 4 pCi/L
Median 1.9 pCi/L · 15 tests · 20.9 points below Lafayette County
- Radon levels in Johnson CountyEPA zone 2
25.4%at or above 4 pCi/L
Median 1.9 pCi/L · 260 tests · 22.2 points below Lafayette County
Lafayette County, Cities and towns
Cities and towns in Lafayette County
The Census Bureau estimates 33,531 residents in Lafayette County for July 1, 2025, 472 more than in 2020 (+1.4%). That works out to 53 people per square mile of land. Oak Grove, the largest place on its list (9,370 residents in all), extends beyond Lafayette County, so no share of the total is worked out for it. Reported testing is thin here: 185 tests over 2007 to 2016, or 5.5 for every 1,000 residents (2025 estimate), where Missouri as a whole comes to 8.8.
From Oak Grove to Aullville, CDC publishes no figure by town: each reads Lafayette County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Oak Groveextends beyond Lafayette County | 9,370 | +14.4% | Counted whole |
| Odessa | 5,721 | +2.0% | 17.1% |
| Higginsville | 4,770 | −1.1% | 14.2% |
| Lexington | 4,568 | −2.0% | 13.6% |
| Concordia | 2,338 | −1.8% | 7.0% |
| Waverly | 819 | +3.0% | 2.4% |
| Wellington | 761 | +2.7% | 2.3% |
| Corder | 433 | +3.1% | 1.3% |
| Alma | 392 | −2.2% | 1.2% |
| Lake Lafayette | 315 | +12.9% | 0.9% |
| Bates City | 227 | +5.1% | 0.7% |
| Blackburnextends beyond Lafayette County | 225 | −0.4% | Counted whole |
- Mayview
- Napoleon
- Emma (part)
- Dover
- Aullville
17 incorporated places, as listed in the U.S. Census Bureau’s 2020 place reference files. “(part)” marks a place that extends into another county. Residents: U.S. Census Bureau population estimates for July 1, 2025 (Vintage 2025). A place that extends beyond Lafayette County is counted whole, so it has no share.
Lafayette County, Homes
Homes in Lafayette County
Lafayette County is a place of houses on their own lots: 83% of its 14,183 homes are detached single-family houses, against 70% across Missouri. Half of its homes were built before 1974, close to Missouri's 1978: 33% date from before 1960 and 16% 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 | Lafayette County | Missouri |
|---|---|---|
| Housing units | 14,183 | 2,809,501 |
| Detached houses | 83% | 70% |
| In buildings of 5 or more | 4% | 13% |
| Mobile homes | 6% | 5% |
| Built before 1960 | 33% | 28% |
| Built since 2000 | 16% | 21% |
| Middle year built | 1974 | 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.