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 Barton County, Missouri
EPA puts Barton 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
Highest bordering
29.1%
Jasper County
- Jasper
- 29.1%
- Vernon
- 8.8%
2 of 5 neighbours have 30+ tests, 2008 to 2017
Nearest county
29.1%
Jasper County, 21 miles
- Jasper
- 29.1%
- Missouri
- 30.6%
Share at 4+ pCi/L, 251 tests, 2008 to 2017
Ground above low
100.0%
5.8 pts above Missouri
- Barton
- 100.0%
- Missouri
- 94.2%
Share of land USGS rates moderate or high potential
Tests reported
27
Too few for a share
- Barton
- 27
- Needed
- 30
2006 to 2015, 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 Barton 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
Barton County, At a glance
Barton County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Barton 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 Barton County, 2023
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 0.0% |
| 2015 | 0.0% |
| 2016 | 33.3% |
| 2017 | 33.3% |
| 2018 | 0.0% |
| 2019 | 0.0% |
| 2020 | 0.0% |
| 2021 | 10.0% |
| 2022 | 0.0% |
| 2023 | 0.0% |
2023: 0.0%. Across these years the share ran from 0.0% to 33.3%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
Only 1 test was reported to CDC for Barton 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).
Barton County, Compared
Barton County radon figures, compared
Calculated by Radon411CDC's largest figure for Barton County rests on 27 tests over the 2006 to 2015 laboratory totals, 6 of them at or above 4 pCi/L, so each test moves its share by 3.7 points and no rank or comparison is drawn from it. Results reached as high as 10.7 pCi/L, with a middle value of 1.3 pCi/L.
Of the counties bordering it, 2 have a figure over the 2008 to 2017 laboratory totals: Jasper County reported the largest share at or above 4 pCi/L, 29.1%, and Vernon County the smallest, 8.8%. Farther out, Lawrence County (39 miles away) at 27.1%, Newton County (41 miles away) at 31.1% and Polk County (53 miles away) at 11.5% 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 Barton County in Zone 2, its middle label: a predicted county average between 2 and 4 pCi/L. USGS geology rates 100% of the county's land moderate radon potential.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Barton County, Geology
The ground under Barton County
PredictedUSGS's geologic map puts all of Barton County's mapped land in one class: moderate radon potential. The map puts 86.2% of Barton County in the area it calls Osage Plains and 13.7% in Springfield 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 |
|---|---|---|---|---|
| Osage Plains | Ordovician dolomite, sandstone, limestone, and shale. | Moderate | 11 | 86.2% |
| Springfield Plateau | Mississippian limestone, shale, and sandstone. | Moderate | 11 | 13.7% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Barton County beside the ground around it
Across Missouri 8.2% of the land is rated high; none of Barton County's is. Of the 5 counties that border it, none has as large a share of moderate-potential ground; Cedar County comes nearest at 100%.
The map rates the ground, not the air in any home.
Local help
Barton County, Local resources
Radon testing and mitigation in Barton 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
Barton County, Questions
Questions about radon in Barton County
Are radon levels high in Barton County?
In 2023, 0.0% of the radon tests reported to CDC for Barton County, Missouri were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.4 pCi/L. Of the counties bordering it, 2 have a figure over the 2008 to 2017 laboratory totals: Jasper County reported the largest share at or above 4 pCi/L, 29.1%, and Vernon County the smallest, 8.8%.
Which counties border Barton County?
Barton County borders 5 counties: Jasper County, MO, Vernon County, MO, Dade County, MO, Crawford County, KS and Cedar County, MO.
Products
Barton County, Products
Testing a home in Barton County
No CDC figure names Barton County; the nearest county with one, Jasper County (21 miles away), reported 29.1% 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 Barton 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
MonitorAEGTEST
HOUND-3786 rechargeable radon monitor with a 3.5-inch color screen
- C-NRPP 2024/25: Not included
- Battery
- Alarm
- Screen
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
Barton County, Bordering counties
Counties bordering Barton County
Calculated by Radon411- Radon levels in Jasper County, MOEPA zone 2
29.1%at or above 4 pCi/L
Median 2.0 pCi/L · 251 tests
- Radon levels in Vernon County, MOEPA zone 2
8.8%at or above 4 pCi/L
Median 0.9 pCi/L · 34 tests
- Radon levels in Cedar County, MOEPA zone 2
5.0%at or above 4 pCi/L
Median 1.3 pCi/L · 20 tests
- Radon levels in Dade County, MOEPA zone 2
0.0%at or above 4 pCi/L
Median 1.3 pCi/L · 7 tests
- Radon levels in Crawford County, KSEPA zone 2
No CDC figure for 2008 to 2017; its page reads it against its own neighbours.
Barton County, Cities and towns
Cities and towns in Barton County
The Census Bureau estimates 11,795 residents in Barton County for July 1, 2025, 171 more than in 2020 (+1.5%). That works out to 20 people per square mile of land. Its largest town, Lamar, has 4,337 residents, 36.8% of the total. Together its 6 incorporated places hold 51.8% of those residents; the other 48.2% live outside any of them. Reported testing is thin here: 27 tests over 2006 to 2015, or 2.3 for every 1,000 residents (2025 estimate), where Missouri as a whole comes to 7.7.
From Lamar to Milford, CDC publishes no figure by town: each reads Barton County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Lamar | 4,337 | +1.7% | 36.8% |
| Golden City | 659 | +0.9% | 5.6% |
| Liberal | 638 | +1.1% | 5.4% |
| Mindenmines | 276 | +1.5% | 2.3% |
| Lamar Heights | 171 | +1.2% | 1.4% |
| Milford | 27 | Level | 0.2% |
6 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).
Barton County, Homes
Homes in Barton County
Barton County is a place of houses on their own lots: 82% of its 5,295 homes are detached single-family houses, against 70% across Missouri. Half of its homes were built before 1973, close to Missouri's 1978: 36% date from before 1960 and 17% from 2000 or later. 70% 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 | Barton County | Missouri |
|---|---|---|
| Housing units | 5,295 | 2,809,501 |
| Detached houses | 82% | 70% |
| In buildings of 5 or more | 1% | 13% |
| Mobile homes | 10% | 5% |
| Built before 1960 | 36% | 28% |
| Built since 2000 | 17% | 21% |
| Middle year built | 1973 | 1978 |
| Owner-occupied | 70% | 68% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.