Short-term kit
RA400 short-term liquid scintillation radon test kit, lab fee included
- Lab fee included
Method: Liquid scintillation
In home: 48 to 96 hours
Locations and reports
Radon Levels in Barry County, Missouri
EPA puts Barry County in Zone 2, its middle radon zone, and only 1 radon test from it is 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
41.8%
11.2 pts above MO
- Barry
- 41.8%
- Missouri
- 30.6%
55 tests, 2008 to 2017
Median result
3.1pCi/L
Below action level
- Barry
- 3.1 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
55
54th of 72 by tests
- Barry
- 55
- 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
10 of 72
Top quarter
- Barry
- 41.8%
- Atchison
- 69.9%
By share, of 72 with 30+ tests
Read a result for Barry County
Starts at Barry County's median, 3.1 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 3.1 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. Barry County's median reported result, 2008 to 2017.
The data
Barry County, At a glance
Barry County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Barry 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 Barry County, 2023
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 20.0% |
| 2015 | 0.0% |
| 2016 | 66.7% |
| 2017 | 0.0% |
| 2018 | 0.0% |
| 2021 | 33.3% |
| 2022 | 50.0% |
| 2023 | 0.0% |
2023: 0.0%. 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 1 test was reported to CDC for Barry 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).
Barry County, Compared
Barry County radon figures, compared
Calculated by Radon411In Barry County, about 4 in 10 reported tests over the 2008 to 2017 laboratory totals (23 of 55) were at or above EPA's action level. Against the national pool of 35.7%, the gap is 6.1 points higher. Across 115 Missouri counties pooled together, 30.6% of tests reached that level, so Barry County runs 11.2 points above its state.
The newest figure, in 2023, counts only 1 test (0.0% at or above 4 pCi/L), too few to compare, so this reading uses the 55-test figure.
Of 4 neighbours with a figure, none reported a larger share at or above 4 pCi/L; the spread is 27.1% (Lawrence County) to 41.6% (Stone County). By share, Barry County is 10th of 72 Missouri counties with 30 or more tests for the same period.
Half the tests came in under 3.1 pCi/L and half over it; the single highest reached 22.5 pCi/L. Below the action level, 9 tests (16.4%) came in under 2 pCi/L, against 41.2% statewide, and 23 tests (41.8%) fell between 2 and 4, against 28.1% statewide.
Zone 2 on EPA's map (predicted average between 2 and 4 pCi/L) and a 41.8% share point the same way here. USGS geology rates 100% of the county's land moderate radon potential.
The busiest year on file was 2022, with 8 tests reported; the quietest, 2023, had 1.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Barry County, Geology
The ground under Barry County
PredictedUSGS's geologic map puts all of Barry County's mapped land in one class: moderate radon potential. The map puts 69.4% of Barry County in the area it calls Springfield Plateau and 30.6% in Salem Plateau. USGS gives both 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 |
|---|---|---|---|---|
| Springfield Plateau | Mississippian limestone, shale, and sandstone. | Moderate | 11 | 69.4% |
| Salem Plateau | Ordovician dolomite, sandstone, limestone, and shale. | Moderate | 11 | 30.6% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Barry County beside the ground around it
Across Missouri 8.2% of the land is rated high; none of Barry County's is. Of the 6 counties that border it, none has as large a share of moderate-potential ground; Benton County, AR comes nearest at 100%.
The map rates the ground, not the air in any home.
Local help
Barry County, Local resources
Radon testing and mitigation in Barry 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
Barry County, Questions
Questions about radon in Barry County
Are radon levels high in Barry County?
In 2023, 0.0% of the radon tests reported to CDC for Barry County, Missouri were at or above 4 pCi/L, and the median reported pre-mitigation result was 0.1 pCi/L. Of 72 Missouri counties with 30 or more tests for the same period, 9 reported a higher share; pooled, the state comes to 30.6%.
Which counties border Barry County?
Barry County borders 6 counties: Stone County, MO, Carroll County, AR, McDonald County, MO, Benton County, AR, Newton County, MO and Lawrence County, MO.
Products
Barry County, Products
Testing a home in Barry County
In Barry County, 41.8% of 55 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 Barry 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
RadonPro Wi-Fi radon monitor with a built-in Geiger counter
- C-NRPP 2024/25: Not included
- Plug-in
- Wi-Fi
- Alarm
- Screen, app
First reading: Within 5 minutes
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Barry County, Bordering counties
Counties bordering Barry County
Calculated by Radon411- Radon levels in Stone County, MOEPA zone 2
41.6%at or above 4 pCi/L
Median 2.9 pCi/L · 137 tests · 0.2 points below Barry County
- Radon levels in Benton County, AREPA zone 2
34.0%at or above 4 pCi/L
Median 2.2 pCi/L · 147 tests · 7.8 points below Barry County
- Radon levels in Newton County, MOEPA zone 2
31.1%at or above 4 pCi/L
Median 2.5 pCi/L · 167 tests · 10.7 points below Barry County
- Radon levels in Carroll County, AREPA zone 2
29.4%at or above 4 pCi/L
Median 2.0 pCi/L · 17 tests · 12.4 points below Barry County
- Radon levels in Lawrence County, MOEPA zone 2
27.1%at or above 4 pCi/L
Median 1.8 pCi/L · 70 tests · 14.7 points below Barry County
- Radon levels in McDonald County, MOEPA zone 2
21.1%at or above 4 pCi/L
Median 1.9 pCi/L · 19 tests · 20.7 points below Barry County
Barry County, Cities and towns
Cities and towns in Barry County
The Census Bureau estimates 36,200 residents in Barry County for July 1, 2025, 1,651 more than in 2020 (+4.8%). That works out to 47 people per square mile of land. Monett, the largest place on its list (10,248 residents in all), extends beyond Barry County, so no share of the total is worked out for it. Reported testing is thin here: 55 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 Monett to Arrow Point, CDC publishes no figure by town: each reads Barry County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Monettextends beyond Barry County | 10,248 | +6.3% | Counted whole |
| Cassville | 3,301 | +3.5% | 9.1% |
| Pierce Cityextends beyond Barry County | 1,275 | +2.0% | Counted whole |
| Purdy | 1,062 | +3.2% | 2.9% |
| Seligman | 951 | +19.3% | 2.6% |
| Exeter | 765 | +3.8% | 2.1% |
| Wheaton | 693 | +7.1% | 1.9% |
| Butterfield | 420 | +8.2% | 1.2% |
| Washburn | 408 | +4.1% | 1.1% |
| Emerald Beach | 226 | +10.8% | 0.6% |
| Chain-O-Lakes | 107 | +2.9% | 0.3% |
| Arrow Point | 80 | +5.3% | 0.2% |
12 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 Barry County is counted whole, so it has no share.
Barry County, Homes
Homes in Barry County
Of Barry County's 17,028 homes, 73% are detached houses, against 70% across Missouri; 16% are mobile homes. Half of its homes were built before 1985, close to Missouri's 1978: 19% date from before 1960 and 25% from 2000 or later. 75% 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 | Barry County | Missouri |
|---|---|---|
| Housing units | 17,028 | 2,809,501 |
| Detached houses | 73% | 70% |
| In buildings of 5 or more | 2% | 13% |
| Mobile homes | 16% | 5% |
| Built before 1960 | 19% | 28% |
| Built since 2000 | 25% | 21% |
| Middle year built | 1985 | 1978 |
| Owner-occupied | 75% | 68% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.