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 Mississippi County, Missouri
EPA puts Mississippi County in Zone 3, its lowest radon zone, and only 1 radon test from it is on file with CDC (2018). Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Highest bordering
29.4%
Scott County
- Scott
- 29.4%
1 of 7 neighbours have 30+ tests, 2008 to 2017
Nearest county
29.4%
Scott County, 22 miles
- Scott
- 29.4%
- Missouri
- 30.6%
Share at 4+ pCi/L, 51 tests, 2008 to 2017
Ground above low
None
94.2 pts below Missouri
- Mississippi
- 0.0%
- Missouri
- 94.2%
Share of land USGS rates moderate or high potential
Tests reported
4
Too few for a share
- Mississippi
- 4
- Needed
- 30
2008 to 2017, laboratory
EPA radon zone
Zone 3
Lower potential
- 1
- 2
- Zone 3
1 highest, 3 lowest
EPA predicts under 2 pCi/L indoors
Read a result for Mississippi County
Starts at EPA's action level
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 4.0 pCi/L
At or above 4 pCi/L
- Under 20 to 1.9 pCi/L
- 2 to 4consider a fix
- 4 and aboveEPA says fix it
This result is at or above 4 pCi/L. EPA recommends fixing a home when the radon level is 4 pCi/L or higher.
The data
Mississippi County, At a glance
Mississippi 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 Mississippi County, 2018
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2016 | 0.0% |
| 2018 | 0.0% |
2018: 0.0%. Across these years the share ran from 0.0% to 0.0%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
Only 1 test was reported to CDC for Mississippi County over 2018, 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: 2018. Measured data period: 2005 to 2018 (every CDC figure on file).
Mississippi County, Compared
Mississippi County radon figures, compared
Calculated by Radon411CDC's largest figure for Mississippi County rests on 4 tests over the 2008 to 2017 laboratory totals, 0 of them at or above 4 pCi/L, so each test moves its share by 25.0 points and no rank or comparison is drawn from it. Results reached as high as 2.9 pCi/L, with a middle value of 0.1 pCi/L.
Scott County, the one bordering county with a figure over the 2008 to 2017 laboratory totals, reported 29.4% of its tests at or above 4 pCi/L. Farther out, Cape Girardeau County (44 miles away) at 35.2%, Butler County (62 miles away) at 21.2% and Perry County (67 miles away) at 37.8% have figures too. Pooled across 115 Missouri counties, 30.6% of reported tests reached that level; across every county in the country with a figure, 35.7%.
Statewide for the same period, Atchison County reported the highest share (69.9%) and Vernon County the lowest (8.8%). EPA's 1993 map puts Mississippi County in Zone 3, its lowest label: a predicted county average under 2 pCi/L. USGS geology rates 100% of the county's land low radon potential.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Mississippi County, Geology
The ground under Mississippi County
PredictedUSGS's geologic map puts all of Mississippi 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.
Mississippi County beside the ground around it
Across Missouri 8.2% of the land is rated high; none of Mississippi County's is. Of the 7 counties that border it, 1 has more moderate-potential ground, Alexander County, IL the most at 54.6%.
The map rates the ground, not the air in any home.
Local help
Mississippi County, Local resources
Radon testing and mitigation in Mississippi 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
Mississippi County, Questions
Questions about radon in Mississippi County
Are radon levels high in Mississippi County?
In 2018, 0.0% of the radon tests reported to CDC for Mississippi County, Missouri were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.4 pCi/L. Scott County, the one bordering county with a figure over the 2008 to 2017 laboratory totals, reported 29.4% of its tests at or above 4 pCi/L.
Which counties border Mississippi County?
Mississippi County borders 7 counties: Carlisle County, KY, Scott County, MO, Hickman County, KY, Fulton County, KY, Alexander County, IL, New Madrid County, MO and Ballard County, KY.
Products
Mississippi County, Products
Testing a home in Mississippi County
No CDC figure names Mississippi County; the nearest county with one, Scott County (22 miles away), reported 29.4% of its tests at or above 4 pCi/L over the 2008 to 2017 laboratory totals, the only reading nearby until a test of this home. 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 Mississippi 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
Mississippi County, Bordering counties
Counties bordering Mississippi County
Calculated by Radon411- Radon levels in Scott County, MOEPA zone 3
29.4%at or above 4 pCi/L
Median 2.2 pCi/L · 51 tests
- Radon levels in Alexander County, ILEPA zone 3
22.2%at or above 4 pCi/L
Median 2.4 pCi/L · 9 tests
- Radon levels in New Madrid County, MOEPA zone 3
11.1%at or above 4 pCi/L
Median 1.4 pCi/L · 9 tests
- Radon levels in Carlisle County, KYEPA zone 3
0.0%at or above 4 pCi/L
Median 2.0 pCi/L · 1 test
- Radon levels in Hickman County, KYEPA zone 3
0.0%at or above 4 pCi/L
Median 0.1 pCi/L · 7 tests
- Radon levels in Fulton County, KYEPA zone 3
0.0%at or above 4 pCi/L
Median 1.9 pCi/L · 1 test
- Radon levels in Ballard County, KYEPA zone 3
0.0%at or above 4 pCi/L
Median 1.4 pCi/L · 4 tests
Mississippi County, Cities and towns
Cities and towns in Mississippi County
About 12,003 people live in Mississippi County by the Census Bureau's estimate for July 1, 2025, 130 fewer than in 2020 (−1.1%). That works out to 29 people per square mile of land. Its largest town, Charleston, has 4,731 residents, 39.4% of the total. Reported testing is thin here: 4 tests over 2008 to 2017, or 0.3 for every 1,000 residents (2025 estimate), where Missouri as a whole comes to 9.3.
From Charleston to Wilson City, CDC publishes no figure by town: each reads Mississippi County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Charleston | 4,731 | +2.5% | 39.4% |
| East Prairie | 2,841 | −2.9% | 23.7% |
| Minerextends beyond Mississippi County | 894 | −2.3% | Counted whole |
| Bertrand | 698 | −2.6% | 5.8% |
| Wyatt | 212 | −4.1% | 1.8% |
| Anniston | 179 | −2.7% | 1.5% |
| Wilson City | 75 | −3.8% | 0.6% |
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 Mississippi County is counted whole, so it has no share.
Mississippi County, Homes
Homes in Mississippi County
Of Mississippi County's 5,282 homes, 74% are detached houses, against 70% across Missouri; 8% are mobile homes. Half of its homes were built before 1974, close to Missouri's 1978: 25% date from before 1960 and 13% from 2000 or later. 61% 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 | Mississippi County | Missouri |
|---|---|---|
| Housing units | 5,282 | 2,809,501 |
| Detached houses | 74% | 70% |
| In buildings of 5 or more | 2% | 13% |
| Mobile homes | 8% | 5% |
| Built before 1960 | 25% | 28% |
| Built since 2000 | 13% | 21% |
| Middle year built | 1974 | 1978 |
| Owner-occupied | 61% | 68% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.