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 Scott County, Missouri
EPA puts Scott County in Zone 3, its lowest 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
29.4%
1.2 pts below MO
- Scott
- 29.4%
- Missouri
- 30.6%
51 tests, 2008 to 2017
Median result
2.2pCi/L
Below action level
- Scott
- 2.2 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
51
56th of 72 by tests
- Scott
- 51
- St. Louis
- 17,747
Reported to CDC before any fix, 2008 to 2017
EPA radon zone
Zone 3
Lower potential
- 1
- 2
- Zone 3
1 highest, 3 lowest
EPA predicts under 2 pCi/L indoors
Rank in Missouri
40 of 72
Middle half
- Scott
- 29.4%
- Atchison
- 69.9%
By share, of 72 with 30+ tests
Read a result for Scott County
Starts at Scott 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. Scott County's median reported result, 2008 to 2017.
The data
Scott County, At a glance
Scott County at a glance
Predicted: EPA radon zone
EPA Zone 3: lower predicted potential
USGS geologic potential: Low across 100% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Scott County, 2023
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 0.0% |
| 2015 | 100.0% |
| 2016 | 0.0% |
| 2017 | 0.0% |
| 2018 | 0.0% |
| 2020 | 100.0% |
| 2021 | 0.0% |
| 2022 | 0.0% |
| 2023 | 50.0% |
2023: 50.0%. 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 Scott 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).
Scott County, Compared
Scott County radon figures, compared
Calculated by Radon411Scott County's 51 reported tests over the 2008 to 2017 laboratory totals had a middle value of 2.2 pCi/L and a maximum of 51.3 pCi/L, and 29.4% reached 4 pCi/L. Missouri as a whole (115 Missouri counties, pooled) comes to 30.6%: 1.2 points higher than here.
The newest figure, in 2023, counts only 2 tests (50.0% at or above 4 pCi/L), too few to compare, so this reading uses the 51-test figure.
Among its state's counties it ranks 40th of 72 Missouri counties with 30 or more tests for the same period. Statewide for the same period, Atchison County reported the highest share (69.9%) and Vernon County the lowest (8.8%).
Below the action level, 24 tests (47.1%) came in under 2 pCi/L, against 41.2% statewide, and 12 tests (23.5%) fell between 2 and 4, against 28.1% statewide. The busiest year on file was 2017, with 5 tests reported; the quietest, 2014, had 1.
EPA's 1993 zone map puts Scott County in Zone 3, a predicted county average under 2 pCi/L. USGS geology rates 100% of the county's land low radon potential.
Cape Girardeau County, the one bordering county with a figure for the same period, reported 35.2%.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Scott County, Geology
The ground under Scott County
PredictedUSGS's geologic map puts all of Scott County's mapped land in one class: low radon potential. All of it lies in the area the map calls Coastal Plains Province, to which USGS gives a radon index of 5, in the low band (5 to 8).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Coastal Plains Province | Tertiary-Quaternary sandstone, shale, and alluvium. | Low | 5 | 100% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Scott County beside the ground around it
Across Missouri 8.2% of the land is rated high; none of Scott County's is. Of the 5 counties that border it, 3 have more moderate-potential ground, Cape Girardeau County the most at 82.9%.
The map rates the ground, not the air in any home.
Local help
Scott County, Local resources
Radon testing and mitigation in Scott 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
Scott County, Questions
Questions about radon in Scott County
Are radon levels high in Scott County?
In 2023, 50.0% of the radon tests reported to CDC for Scott County, Missouri were at or above 4 pCi/L, and the median reported pre-mitigation result was 3.1 pCi/L. Of 72 Missouri counties with 30 or more tests for the same period, 39 reported a higher share; pooled, the state comes to 30.6%.
Which counties border Scott County?
Scott County borders 5 counties: Alexander County, IL, Cape Girardeau County, MO, Mississippi County, MO, Stoddard County, MO and New Madrid County, MO.
Products
Scott County, Products
Testing a home in Scott County
In Scott County, 29.4% of 51 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 30.6% pooled across Missouri. Zone 3 is the lowest label, yet homes at or above 4 pCi/L occur in every zone: a short-term kit (2 to 90 days) is the quick first check in Scott County.
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
MonitorAranet
Radon One battery digital radon monitor with an e-ink screen
- C-NRPP 2024/25: Not included
- 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
Scott County, Bordering counties
Counties bordering Scott County
Calculated by Radon41135.2%at or above 4 pCi/L
Median 2.8 pCi/L · 253 tests · 5.8 points above Scott County
- Radon levels in Alexander County, ILEPA zone 3
22.2%at or above 4 pCi/L
Median 2.4 pCi/L · 9 tests · 7.2 points below Scott County
- Radon levels in Stoddard County, MOEPA zone 3
12.0%at or above 4 pCi/L
Median 1.1 pCi/L · 25 tests · 17.4 points below Scott County
- Radon levels in New Madrid County, MOEPA zone 3
11.1%at or above 4 pCi/L
Median 1.4 pCi/L · 9 tests · 18.3 points below Scott County
- Radon levels in Mississippi County, MOEPA zone 3
0.0%at or above 4 pCi/L
Median 0.1 pCi/L · 4 tests · 29.4 points below Scott County
Scott County, Cities and towns
Cities and towns in Scott County
Scott County's population has barely moved since 2020: 37,975 residents on July 1, 2025 against 38,021 then, by the Census Bureau's estimates. That works out to 90 people per square mile of land. Cape Girardeau, the largest place on its list (40,977 residents in all), extends beyond Scott County, so no share of the total is worked out for it. Reported testing is thin here: 51 tests over 2008 to 2017, or 1.3 for every 1,000 residents (2025 estimate), where Missouri as a whole comes to 9.3.
From Cape Girardeau to Commerce, CDC publishes no figure by town: each reads Scott County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Cape Girardeauextends beyond Scott County | 40,977 | +3.0% | Counted whole |
| Sikestonextends beyond Scott County | 15,983 | −1.7% | Counted whole |
| Scott Cityextends beyond Scott County | 4,593 | +6.0% | Counted whole |
| Chaffee | 3,017 | −1.0% | 7.9% |
| Oran | 1,195 | +0.2% | 3.1% |
| Benton | 919 | +4.9% | 2.4% |
| Minerextends beyond Scott County | 894 | −2.3% | Counted whole |
| Morley | 668 | +6.2% | 1.8% |
| Kelso | 551 | −1.1% | 1.5% |
| Blodgett | 222 | −2.2% | 0.6% |
| Vanduser | 186 | +2.8% | 0.5% |
| Diehlstadt | 156 | −1.9% | 0.4% |
- Haywood City
- Commerce
14 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 Scott County is counted whole, so it has no share.
Scott County, Homes
Homes in Scott County
Scott County is a place of houses on their own lots: 76% of its 16,833 homes are detached single-family houses, against 70% across Missouri. Half of its homes were built before 1976, close to Missouri's 1978: 26% date from before 1960 and 14% from 2000 or later. 69% 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 | Scott County | Missouri |
|---|---|---|
| Housing units | 16,833 | 2,809,501 |
| Detached houses | 76% | 70% |
| In buildings of 5 or more | 5% | 13% |
| Mobile homes | 11% | 5% |
| Built before 1960 | 26% | 28% |
| Built since 2000 | 14% | 21% |
| Middle year built | 1976 | 1978 |
| Owner-occupied | 69% | 68% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.