Short-term kitFirst Alert
RD1 short-term charcoal radon test kit
- Lab fee included
Method: Charcoal
In home: 2 to 4 days
Locations and reports
Radon Levels in Dunklin County, Missouri
EPA puts Dunklin County in Zone 3, its lowest radon zone, and only 2 radon tests from it are on file with CDC (2022). Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Highest bordering
21.2%
Butler County
- Butler
- 21.2%
1 of 8 neighbours have 30+ tests, 2008 to 2017
Nearest county
21.2%
Butler County, 35 miles
- Butler
- 21.2%
- Missouri
- 30.6%
Share at 4+ pCi/L, 33 tests, 2008 to 2017
Ground above low
None
94.2 pts below Missouri
- Dunklin
- 0.0%
- Missouri
- 94.2%
Share of land USGS rates moderate or high potential
Tests reported
16
Too few for a share
- Dunklin
- 16
- 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 Dunklin 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
Dunklin County, At a glance
Dunklin 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 Dunklin County, 2022
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2016 | 0.0% |
| 2017 | 0.0% |
| 2018 | 0.0% |
| 2022 | 0.0% |
2022: 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 2 tests were reported to CDC for Dunklin County over 2022, 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: 2022. Measured data period: 2005 to 2022 (every CDC figure on file).
Dunklin County, Compared
Dunklin County radon figures, compared
Calculated by Radon411CDC's largest figure for Dunklin County rests on 16 tests over the 2008 to 2017 laboratory totals, 1 of them at or above 4 pCi/L, so each test moves its share by 6.3 points and no rank or comparison is drawn from it. Results reached as high as 9.9 pCi/L, with a middle value of 1.3 pCi/L.
Butler County, the one bordering county with a figure over the 2008 to 2017 laboratory totals, reported 21.2% of its tests at or above 4 pCi/L. Farther out, Scott County (61 miles away) at 29.4%, Cape Girardeau County (80 miles away) at 35.2% and Perry County (100 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 Dunklin 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.
Dunklin County, Geology
The ground under Dunklin County
PredictedUSGS's geologic map puts all of Dunklin 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 | 99.7% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Dunklin County beside the ground around it
Across Missouri 8.2% of the land is rated high; none of Dunklin County's is. Of the 8 counties that border it, 5 have more moderate-potential ground, Butler County the most at 38.7%.
The map rates the ground, not the air in any home.
Local help
Dunklin County, Local resources
Radon testing and mitigation in Dunklin 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
Dunklin County, Questions
Questions about radon in Dunklin County
Are radon levels high in Dunklin County?
In 2022, 0.0% of the radon tests reported to CDC for Dunklin County, Missouri were at or above 4 pCi/L, and the median reported pre-mitigation result was 0.5 pCi/L. Butler County, the one bordering county with a figure over the 2008 to 2017 laboratory totals, reported 21.2% of its tests at or above 4 pCi/L.
Which counties border Dunklin County?
Dunklin County borders 8 counties: Pemiscot County, MO, Clay County, AR, New Madrid County, MO, Greene County, AR, Butler County, MO, Stoddard County, MO, Mississippi County, AR and Craighead County, AR.
Products
Dunklin County, Products
Testing a home in Dunklin County
No CDC figure names Dunklin County; the nearest county with one, Butler County (35 miles away), reported 21.2% 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 Dunklin 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
MonitorPYZYCKYH
RD17 plug-in radon detector with a rechargeable battery and color 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
Dunklin County, Bordering counties
Counties bordering Dunklin County
Calculated by Radon411- Radon levels in Mississippi County, AREPA zone 3
75.0%at or above 4 pCi/L
Median 9.8 pCi/L · 4 tests
- Radon levels in Craighead County, AREPA zone 3
25.0%at or above 4 pCi/L
Median 1.1 pCi/L · 8 tests
- Radon levels in Butler County, MOEPA zone 3
21.2%at or above 4 pCi/L
Median 1.9 pCi/L · 33 tests
- Radon levels in Stoddard County, MOEPA zone 3
12.0%at or above 4 pCi/L
Median 1.1 pCi/L · 25 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 Pemiscot County, MOEPA zone 3
0.0%at or above 4 pCi/L
Median 0.8 pCi/L · 5 tests
- Radon levels in Clay County, AREPA zone 3
0.0%at or above 4 pCi/L
Median 0.2 pCi/L · 1 test
- Radon levels in Greene County, AREPA zone 3
0.0%at or above 4 pCi/L
Median 1.4 pCi/L · 3 tests
Dunklin County, Cities and towns
Cities and towns in Dunklin County
About 26,855 people live in Dunklin County by the Census Bureau's estimate for July 1, 2025, 1,361 fewer than in 2020 (−4.8%). That works out to 50 people per square mile of land. Its largest town, Kennett, has 10,118 residents, 37.7% of the total. Together its 10 incorporated places hold 73.0% of those residents; the other 27.0% live outside any of them. Reported testing is thin here: 16 tests over 2008 to 2017, or 0.6 for every 1,000 residents (2025 estimate), where Missouri as a whole comes to 9.3.
From Kennett to Rives, CDC publishes no figure by town: each reads Dunklin County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Kennett | 10,118 | −3.5% | 37.7% |
| Malden | 3,493 | −5.5% | 13.0% |
| Senath | 1,504 | −5.3% | 5.6% |
| Campbell | 1,489 | −5.9% | 5.5% |
| Clarkton | 944 | −6.0% | 3.5% |
| Holcomb | 589 | −5.8% | 2.2% |
| Cardwell | 529 | −5.9% | 2.0% |
| Hornersville | 500 | −6.2% | 1.9% |
| Arbyrd | 387 | −4.4% | 1.4% |
| Rives | 40 | −2.4% | 0.1% |
10 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).
Dunklin County, Homes
Homes in Dunklin County
Dunklin County is a place of houses on their own lots: 79% of its 13,451 homes are detached single-family houses, against 70% across Missouri. Half of its homes were built before 1971, close to Missouri's 1978: 32% date from before 1960 and 9% from 2000 or later. 62% 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 | Dunklin County | Missouri |
|---|---|---|
| Housing units | 13,451 | 2,809,501 |
| Detached houses | 79% | 70% |
| In buildings of 5 or more | 3% | 13% |
| Mobile homes | 9% | 5% |
| Built before 1960 | 32% | 28% |
| Built since 2000 | 9% | 21% |
| Middle year built | 1971 | 1978 |
| Owner-occupied | 62% | 68% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.