Short-term kitempowerDX
Standard Radon Test short-term mail-in radon test kit
- Lab fee included
Method: Passive sampler
In home: 48 to 96 hours
Locations and reports
Radon Levels in Laclede County, Missouri
EPA puts Laclede County in Zone 2, its middle radon zone, and only 5 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
37.0%
6.4 pts above MO
- Laclede
- 37.0%
- Missouri
- 30.6%
46 tests, 2008 to 2017
Median result
2.3pCi/L
Below action level
- Laclede
- 2.3 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
46
60th of 72 by tests
- Laclede
- 46
- 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
25 of 72
Middle half
- Laclede
- 37.0%
- Atchison
- 69.9%
By share, of 72 with 30+ tests
Read a result for Laclede County
Starts at Laclede County's median, 2.3 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 2.3 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. Laclede County's median reported result, 2008 to 2017.
The data
Laclede County, At a glance
Laclede County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Laclede 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 Laclede County, 2023
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 66.7% |
| 2015 | 50.0% |
| 2017 | 0.0% |
| 2020 | 14.3% |
| 2022 | 50.0% |
| 2023 | 40.0% |
2023: 40.0%. Across these years the share ran from 0.0% to 66.7%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
Only 5 tests were reported to CDC for Laclede 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).
Laclede County, Compared
Laclede County radon figures, compared
Calculated by Radon411In Laclede County, about 4 in 10 reported tests over the 2008 to 2017 laboratory totals (17 of 46) were at or above EPA's action level. Against the national pool of 35.7%, the gap is 1.3 points higher. Across 115 Missouri counties pooled together, 30.6% of tests reached that level, so Laclede County runs 6.4 points above its state.
The newest figure, in 2023, counts only 5 tests (40.0% at or above 4 pCi/L), too few to compare, so this reading uses the 46-test figure.
Of 4 neighbours with a figure, none reported a larger share at or above 4 pCi/L; the spread is 18.7% (Pulaski County) to 22.9% (Camden County). By share, Laclede County is 25th of 72 Missouri counties with 30 or more tests for the same period.
Half the tests came in under 2.3 pCi/L and half over it; the single highest reached 26.4 pCi/L. Below the action level, 21 tests (45.7%) came in under 2 pCi/L, against 41.2% statewide, and 8 tests (17.4%) 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 37.0% share point the same way here. USGS geology rates 100% of the county's land moderate radon potential.
The busiest year on file was 2022, with 10 tests reported; the quietest, 2017, had 1.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Laclede County, Geology
The ground under Laclede County
PredictedUSGS's geologic map puts all of Laclede County's mapped land in one class: moderate radon potential. All of it lies in the area the map calls Salem Plateau, 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 |
|---|---|---|---|---|
| Salem Plateau | Ordovician dolomite, sandstone, limestone, and shale. | Moderate | 11 | 100% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Laclede County beside the ground around it
Across Missouri 8.2% of the land is rated high; none of Laclede County's is. Of the 6 counties that border it, none has as large a share of moderate-potential ground; Camden County comes nearest at 100%.
The map rates the ground, not the air in any home.
Local help
Laclede County, Local resources
Radon testing and mitigation in Laclede 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
Laclede County, Questions
Questions about radon in Laclede County
Are radon levels high in Laclede County?
In 2023, 40.0% of the radon tests reported to CDC for Laclede County, Missouri were at or above 4 pCi/L, and the median reported pre-mitigation result was 3.3 pCi/L. Of 72 Missouri counties with 30 or more tests for the same period, 24 reported a higher share; pooled, the state comes to 30.6%.
Which counties border Laclede County?
Laclede County borders 6 counties: Pulaski County, Wright County, Dallas County, Camden County, Webster County and Texas County.
Products
Laclede County, Products
Testing a home in Laclede County
In Laclede County, 37.0% of 46 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 Laclede 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
MonitorAEGTEST
HOUND-1011 rechargeable radon detector with a screen
- C-NRPP 2024/25: Not included
- Battery
- Alarm
- Screen
Method: Semiconductor sensor
First reading: Within 6 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Laclede County, Bordering counties
Counties bordering Laclede County
Calculated by Radon411- Radon levels in Wright CountyEPA zone 2
27.8%at or above 4 pCi/L
Median 2.7 pCi/L · 18 tests · 9.2 points below Laclede County
- Radon levels in Camden CountyEPA zone 2
22.9%at or above 4 pCi/L
Median 2.2 pCi/L · 763 tests · 14.1 points below Laclede County
- Radon levels in Webster CountyEPA zone 2
20.4%at or above 4 pCi/L
Median 1.6 pCi/L · 103 tests · 16.6 points below Laclede County
- Radon levels in Texas CountyEPA zone 2
19.3%at or above 4 pCi/L
Median 1.3 pCi/L · 57 tests · 17.7 points below Laclede County
- Radon levels in Pulaski CountyEPA zone 2
18.7%at or above 4 pCi/L
Median 1.3 pCi/L · 107 tests · 18.3 points below Laclede County
- Radon levels in Dallas CountyEPA zone 2
14.8%at or above 4 pCi/L
Median 1.4 pCi/L · 27 tests · 22.2 points below Laclede County
Laclede County, Cities and towns
Cities and towns in Laclede County
The Census Bureau estimates 36,943 residents in Laclede County for July 1, 2025, 897 more than in 2020 (+2.5%). That works out to 48 people per square mile of land. Its largest town, Lebanon, has 15,663 residents, 42.4% of the total. Reported testing is thin here: 46 tests over 2008 to 2017, or 1.2 for every 1,000 residents (2025 estimate), where Missouri as a whole comes to 9.3.
From Lebanon to Evergreen, CDC publishes no figure by town: each reads Laclede County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Lebanon | 15,663 | +4.4% | 42.4% |
| Richlandextends beyond Laclede County | 1,737 | +0.1% | Counted whole |
| Conway | 738 | +0.4% | 2.0% |
| Stoutlandextends beyond Laclede County | 207 | +1.5% | Counted whole |
| Phillipsburg | 166 | +0.6% | 0.4% |
| Evergreen | 21 | Level | Under 0.1% |
6 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 Laclede County is counted whole, so it has no share.
Laclede County, Homes
Homes in Laclede County
Of Laclede County's 15,951 homes, 70% are detached houses, against 70% across Missouri; 15% are mobile homes. Half of its homes were built before 1984, close to Missouri's 1978: 22% date from before 1960 and 26% from 2000 or later. 70% of occupied homes are lived in by their owner (Missouri: 68%); in the rest a tenant can run a test, but a fix is the landlord's to make.
| Homes | Laclede County | Missouri |
|---|---|---|
| Housing units | 15,951 | 2,809,501 |
| Detached houses | 70% | 70% |
| In buildings of 5 or more | 6% | 13% |
| Mobile homes | 15% | 5% |
| Built before 1960 | 22% | 28% |
| Built since 2000 | 26% | 21% |
| Middle year built | 1984 | 1978 |
| Owner-occupied | 70% | 68% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.