Short-term kit
PicoCan short-term charcoal canister radon test
- Lab fee included
Method: Charcoal
In home: 48 to 96 hours
Locations and reports
Radon Levels in Crawford County, Missouri
EPA puts Crawford County in Zone 2, its middle radon zone, and only 2 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
14.7%
15.9 pts below MO
- Crawford
- 14.7%
- Missouri
- 30.6%
34 tests, 2008 to 2017
Median result
1.5pCi/L
Below action level
- Crawford
- 1.5 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
34
67th of 72 by tests
- Crawford
- 34
- 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
68 of 72
Lowest quarter
- Crawford
- 14.7%
- Atchison
- 69.9%
By share, of 72 with 30+ tests
Read a result for Crawford County
Starts at Crawford County's median, 1.5 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 1.5 pCi/L
Below 2 pCi/L
- Under 20 to 1.9 pCi/L
- 2 to 4consider a fix
- 4 and aboveEPA says fix it
This result is below 2 pCi/L, the level at which EPA says a fix should be considered. Crawford County's median reported result, 2008 to 2017.
The data
Crawford County, At a glance
Crawford County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Crawford 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 Crawford County, 2023
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 0.0% |
| 2015 | 0.0% |
| 2016 | 20.0% |
| 2017 | 0.0% |
| 2019 | 50.0% |
| 2021 | 0.0% |
| 2022 | 50.0% |
| 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 2 tests were reported to CDC for Crawford 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).
Crawford County, Compared
Crawford County radon figures, compared
Calculated by Radon411Crawford County reports fewer high tests than Missouri overall. 14.7% of its 34 tests over the 2008 to 2017 laboratory totals were at or above 4 pCi/L. That is 15.9 points below the 30.6% pooled from 115 Missouri counties.
The newest figure, in 2023, counts only 2 tests (100.0% at or above 4 pCi/L), too few to compare, so this reading uses the 34-test figure.
Ordered from highest share down, it comes 68th of 72 Missouri counties with 30 or more tests for the same period. Nationally, every county with a figure for the same period pools to 35.7%; Crawford County sits 21.0 points below it.
Next door, the shares run from 14.7% in Phelps County to 33.2% in Franklin County. Zone 2 on EPA's map (predicted average between 2 and 4 pCi/L) and a 14.7% share point the same way here.
Half the tests came in under 1.5 pCi/L and half over it; the single highest reached 17.9 pCi/L. The rest split 58.8% under 2 pCi/L and 26.5% from 2 to 4 (Missouri: 41.2% and 28.1%).
The busiest year on file was 2016, with 10 tests reported; the quietest, 2021, had 1.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Crawford County, Geology
The ground under Crawford County
PredictedUSGS's geologic map puts all of Crawford 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.
Crawford County beside the ground around it
Across Missouri 8.2% of the land is rated high; none of Crawford County's is. Of the 6 counties that border it, 2 have more high-potential ground, Iron County the most at 85.3%.
The map rates the ground, not the air in any home.
Local help
Crawford County, Local resources
Radon testing and mitigation in Crawford 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
Crawford County, Questions
Questions about radon in Crawford County
Are radon levels high in Crawford County?
In 2023, 100.0% of the radon tests reported to CDC for Crawford County, Missouri were at or above 4 pCi/L, and the median reported pre-mitigation result was 7.3 pCi/L. Of 72 Missouri counties with 30 or more tests for the same period, 67 reported a higher share; pooled, the state comes to 30.6%.
Which counties border Crawford County?
Crawford County borders 6 counties: Washington County, Phelps County, Dent County, Franklin County, Gasconade County and Iron County.
Products
Crawford County, Products
Testing a home in Crawford County
In Crawford County, 14.7% of 34 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 Crawford 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
MonitorAranet
Radon Plus battery digital radon monitor with an e-ink screen
- C-NRPP 2024/25: Approved
- Battery
- 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
Crawford County, Bordering counties
Counties bordering Crawford County
Calculated by Radon411- Radon levels in Iron CountyEPA zone 1
50.0%at or above 4 pCi/L
Median 3.5 pCi/L · 14 tests · 35.3 points above Crawford County
- Radon levels in Dent CountyEPA zone 2
35.7%at or above 4 pCi/L
Median 3.0 pCi/L · 14 tests · 21.0 points above Crawford County
- Radon levels in Franklin CountyEPA zone 2
33.2%at or above 4 pCi/L
Median 2.6 pCi/L · 753 tests · 18.5 points above Crawford County
- Radon levels in Gasconade CountyEPA zone 2
31.8%at or above 4 pCi/L
Median 2.3 pCi/L · 44 tests · 17.1 points above Crawford County
- Radon levels in Washington CountyEPA zone 2
26.3%at or above 4 pCi/L
Median 1.5 pCi/L · 38 tests · 11.6 points above Crawford County
- Radon levels in Phelps CountyEPA zone 2
14.7%at or above 4 pCi/L
Median 1.5 pCi/L · 204 tests · 0.0 points above Crawford County
Crawford County, Cities and towns
Cities and towns in Crawford County
Crawford County's population has barely moved since 2020: 22,929 residents on July 1, 2025 against 23,030 then, by the Census Bureau's estimates. That works out to 31 people per square mile of land. Sullivan, the largest place on its list (6,942 residents in all), extends beyond Crawford County, so no share of the total is worked out for it. Reported testing is thin here: 34 tests over 2008 to 2017, or 1.5 for every 1,000 residents (2025 estimate), where Missouri as a whole comes to 9.3.
From Sullivan to St. Cloud, CDC publishes no figure by town: each reads Crawford County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Sullivanextends beyond Crawford County | 6,942 | +0.6% | Counted whole |
| Cuba | 3,288 | +3.9% | 14.3% |
| Bourbon | 1,544 | −1.4% | 6.7% |
| Steelville | 1,447 | −1.2% | 6.3% |
| Leasburg | 318 | −1.5% | 1.4% |
| West Sullivan | 281 | −1.7% | 1.2% |
| St. Cloud | 39 | −2.5% | 0.2% |
7 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 Crawford County is counted whole, so it has no share.
Crawford County, Homes
Homes in Crawford County
Crawford County is a place of houses on their own lots: 76% of its 11,423 homes are detached single-family houses, against 70% across Missouri. Half of its homes were built before 1980, close to Missouri's 1978: 18% date from before 1960 and 23% from 2000 or later. 72% 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 | Crawford County | Missouri |
|---|---|---|
| Housing units | 11,423 | 2,809,501 |
| Detached houses | 76% | 70% |
| In buildings of 5 or more | 3% | 13% |
| Mobile homes | 15% | 5% |
| Built before 1960 | 18% | 28% |
| Built since 2000 | 23% | 21% |
| Middle year built | 1980 | 1978 |
| Owner-occupied | 72% | 68% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.