Short-term kitKidde
442020 short-term charcoal radon test kit
- Lab fee included
Method: Charcoal
In home: 3 days
Locations and reports
Radon Levels in Wayne County, Missouri
EPA puts Wayne County in Zone 2, its middle radon zone, and only 3 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 7 neighbours have 30+ tests, 2008 to 2017
Nearest county
21.2%
Butler County, 27 miles
- Butler
- 21.2%
- Missouri
- 30.6%
Share at 4+ pCi/L, 33 tests, 2008 to 2017
Ground above low
98.0%
3.8 pts above Missouri
- Wayne
- 98.0%
- Missouri
- 94.2%
Share of land USGS rates moderate or high potential
Tests reported
17
Too few for a share
- Wayne
- 17
- Needed
- 30
2008 to 2017, laboratory
EPA radon zone
Zone 2
Moderate potential
- 1
- Zone 2
- 3
1 highest, 3 lowest
EPA predicts 2 to 4 pCi/L indoors
Read a result for Wayne 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
Wayne County, At a glance
Wayne County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Wayne County is a
USGS geologic potential: Moderate across 86% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Wayne County, 2022
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2016 | 0.0% |
| 2017 | 0.0% |
| 2021 | 0.0% |
| 2022 | 66.7% |
2022: 66.7%. 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 3 tests were reported to CDC for Wayne 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).
Wayne County, Compared
Wayne County radon figures, compared
Calculated by Radon411CDC's largest figure for Wayne County rests on 17 tests over the 2008 to 2017 laboratory totals, 4 of them at or above 4 pCi/L, so each test moves its share by 5.9 points and no rank or comparison is drawn from it. Results reached as high as 10.2 pCi/L, with a middle value of 1.9 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, Cape Girardeau County (47 miles away) at 35.2%, St. Francois County (48 miles away) at 41.1% and Scott County (50 miles away) at 29.4% 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 Wayne County in Zone 2, its middle label: a predicted county average between 2 and 4 pCi/L. USGS geology rates 86% of the county's land moderate radon potential.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Wayne County, Geology
The ground under Wayne County
PredictedMost of the ground under Wayne County is one class on USGS's geologic map: 85.6% of its land is moderate radon potential, with 12.4% high and 2.0% low. The map puts 85.6% of Wayne County in the area it calls Salem Plateau and 12.4% in St. Francois Mountains, with one smaller area beside them. USGS gives the first a radon index of 11, in the moderate band (9 to 11), and the second 13, in the high band (12 to 17).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Salem Plateau | Ordovician dolomite, sandstone, limestone, and shale. | Moderate | 11 | 85.6% |
| St. Francois Mountains | Granitic and volcanic rocks. Some soils have high uranium concentrations. | High | 13 | 12.4% |
| Coastal Plains Province | Tertiary-Quaternary sandstone, shale, and alluvium. | Low | 5 | 2.0% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Wayne County beside the ground around it
On high-potential ground Wayne County is close to Missouri as a whole: 12.4% of its land against 8.2%. Of the 7 counties that border it, 3 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
Wayne County, Local resources
Radon testing and mitigation in Wayne 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
Wayne County, Questions
Questions about radon in Wayne County
Are radon levels high in Wayne County?
In 2022, 66.7% of the radon tests reported to CDC for Wayne County, Missouri were at or above 4 pCi/L, and the median reported pre-mitigation result was 5.6 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 Wayne County?
Wayne County borders 7 counties: Madison County, Butler County, Iron County, Carter County, Reynolds County, Stoddard County and Bollinger County.
Products
Wayne County, Products
Testing a home in Wayne County
No CDC figure names Wayne County; the nearest county with one, Butler County (27 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. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Wayne 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
Monitor
RadonEye RD200 plug-in continuous radon monitor
- C-NRPP 2024/25: Approved
- Plug-in
- 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
Wayne County, Bordering counties
Counties bordering Wayne 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
- Radon levels in Madison CountyEPA zone 2
39.1%at or above 4 pCi/L
Median 3.5 pCi/L · 23 tests
- Radon levels in Reynolds CountyEPA zone 2
33.3%at or above 4 pCi/L
Median 2.2 pCi/L · 3 tests
- Radon levels in Carter CountyEPA zone 2
25.0%at or above 4 pCi/L
Median 2.8 pCi/L · 4 tests
- Radon levels in Butler CountyEPA zone 3
21.2%at or above 4 pCi/L
Median 1.9 pCi/L · 33 tests
- Radon levels in Stoddard CountyEPA zone 3
12.0%at or above 4 pCi/L
Median 1.1 pCi/L · 25 tests
- Radon levels in Bollinger CountyEPA zone 2
0.0%at or above 4 pCi/L
Median 1.4 pCi/L · 6 tests
Wayne County, Cities and towns
Cities and towns in Wayne County
About 10,782 people live in Wayne County by the Census Bureau's estimate for July 1, 2025, 155 fewer than in 2020 (−1.4%). That works out to 14 people per square mile of land. No town dominates: Piedmont, the largest, has 1,862 residents, 17.3% of the total. Together its 4 incorporated places hold 25.4% of those residents; the other 74.6% live outside any of them. Reported testing is thin here: 17 tests over 2008 to 2017, or 1.6 for every 1,000 residents (2025 estimate), where Missouri as a whole comes to 9.3.
From Piedmont to Mill Spring, CDC publishes no figure by town: each reads Wayne County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Piedmont | 1,862 | −2.0% | 17.3% |
| Greenville | 440 | −1.8% | 4.1% |
| Williamsville | 274 | −0.7% | 2.5% |
| Mill Spring | 159 | Level | 1.5% |
4 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).
Wayne County, Homes
Homes in Wayne County
Wayne County is a place of houses on their own lots: 76% of its 6,148 homes are detached single-family houses, against 70% across Missouri. Half of its homes were built before 1979, close to Missouri's 1978: 23% date from before 1960 and 16% from 2000 or later. Owners live in 76% of the occupied homes (Missouri: 68%), so for most households a test and a fix are their own to order.
| Homes | Wayne County | Missouri |
|---|---|---|
| Housing units | 6,148 | 2,809,501 |
| Detached houses | 76% | 70% |
| In buildings of 5 or more | 2% | 13% |
| Mobile homes | 19% | 5% |
| Built before 1960 | 23% | 28% |
| Built since 2000 | 16% | 21% |
| Middle year built | 1979 | 1978 |
| Owner-occupied | 76% | 68% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.