Short-term kit
RA100 short-term liquid scintillation radon test kit
- Lab fee extra
Method: Liquid scintillation
In home: 48 to 96 hours
Locations and reports
Radon Levels in Newton County, Missouri
EPA puts Newton County in Zone 2, its middle radon zone, and only 4 radon tests from it are 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
31.1%
0.5 pts above MO
- Newton
- 31.1%
- Missouri
- 30.6%
167 tests, 2008 to 2017
Median result
2.5pCi/L
Below action level
- Newton
- 2.5 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
167
26th of 72 by tests
- Newton
- 167
- 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
36 of 72
Middle half
- Newton
- 31.1%
- Atchison
- 69.9%
By share, of 72 with 30+ tests
Read a result for Newton County
Starts at Newton County's median, 2.5 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 2.5 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. Newton County's median reported result, 2008 to 2017.
The data
Newton County, At a glance
Newton County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Newton 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 Newton County, 2023
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 33.3% |
| 2015 | 37.5% |
| 2016 | 20.0% |
| 2017 | 16.7% |
| 2018 | 0.0% |
| 2019 | 33.3% |
| 2020 | 11.1% |
| 2021 | 30.8% |
| 2022 | 41.7% |
| 2023 | 50.0% |
2023: 50.0%. Across these years the share ran from 0.0% to 50.0%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
Only 4 tests were reported to CDC for Newton 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).
Newton County, Compared
Newton County radon figures, compared
Calculated by Radon411In Newton County, about 3 in 10 reported tests over the 2008 to 2017 laboratory totals (52 of 167) were at or above EPA's action level. Against the national pool of 35.7%, the gap is 4.6 points lower. Across 115 Missouri counties pooled together, 30.6% of tests reached that level, so Newton County runs 0.5 points above its state.
The newest figure, in 2023, counts only 4 tests (50.0% at or above 4 pCi/L), too few to compare, so this reading uses the 167-test figure.
Of 3 neighbours with a figure, 1 reported a larger share at or above 4 pCi/L and 2 a smaller one; the spread is 27.1% (Lawrence County) to 41.8% (Barry County). By share, Newton County is 36th of 72 Missouri counties with 30 or more tests for the same period.
Half the tests came in under 2.5 pCi/L and half over it; the single highest reached 26.9 pCi/L. Below the action level, 69 tests (41.3%) came in under 2 pCi/L, against 41.2% statewide, and 46 tests (27.5%) 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 31.1% share point the same way here. USGS geology rates 100% of the county's land moderate radon potential. CDC also counts 7 tests taken after mitigation in Newton County for the same period: tests in homes where a fix was already in.
The busiest year on file was 2022, with 24 tests reported; the quietest, 2019, had 3.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Newton County, Geology
The ground under Newton County
PredictedUSGS's geologic map puts all of Newton County's mapped land in one class: moderate radon potential. All of it lies in the area the map calls Springfield Plateau, to which USGS gives 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 | 100% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Newton County beside the ground around it
Across Missouri 8.2% of the land is rated high; none of Newton County's is. Of the 6 counties that border it, none has as large a share of moderate-potential ground; Barry County comes nearest at 100%.
The map rates the ground, not the air in any home.
Local help
Newton County, Local resources
Radon testing and mitigation in Newton 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
Newton County, Questions
Questions about radon in Newton County
Are radon levels high in Newton County?
In 2023, 50.0% of the radon tests reported to CDC for Newton County, Missouri were at or above 4 pCi/L, and the median reported pre-mitigation result was 3.4 pCi/L. Of 72 Missouri counties with 30 or more tests for the same period, 35 reported a higher share; pooled, the state comes to 30.6%.
Which counties border Newton County?
Newton County borders 6 counties: McDonald County, MO, Jasper County, MO, Ottawa County, OK, Barry County, MO, Cherokee County, KS and Lawrence County, MO.
Products
Newton County, Products
Testing a home in Newton County
In Newton County, 31.1% of 167 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 Newton County; a long-term test tells the year-round average.
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
Monitor
lüft plug-in radon and indoor air quality monitor
- C-NRPP 2024/25: Approved
- Plug-in
- Wi-Fi, Bluetooth
- App only
First reading: Within 90 minutes
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Newton County, Bordering counties
Counties bordering Newton County
Calculated by Radon411- Radon levels in Barry County, MOEPA zone 2
41.8%at or above 4 pCi/L
Median 3.1 pCi/L · 55 tests · 10.7 points above Newton County
- Radon levels in Jasper County, MOEPA zone 2
29.1%at or above 4 pCi/L
Median 2.0 pCi/L · 251 tests · 2.0 points below Newton County
- Radon levels in Lawrence County, MOEPA zone 2
27.1%at or above 4 pCi/L
Median 1.8 pCi/L · 70 tests · 4.0 points below Newton County
- Radon levels in McDonald County, MOEPA zone 2
21.1%at or above 4 pCi/L
Median 1.9 pCi/L · 19 tests · 10.0 points below Newton County
- Radon levels in Ottawa County, OKEPA zone 3
0.0%at or above 4 pCi/L
Median 0.2 pCi/L · 3 tests · 31.1 points below Newton County
- Radon levels in Cherokee County, KSEPA zone 2
No CDC figure for 2008 to 2017; its page reads it against its own neighbours.
Newton County, Cities and towns
Cities and towns in Newton County
Newton County is growing: the Census Bureau puts it at 62,263 residents on July 1, 2025, up 6.1% from 58,702 in 2020. That works out to 100 people per square mile of land. Joplin, the largest place on its list (53,930 residents in all), extends beyond Newton County, so no share of the total is worked out for it. Reported testing is thin here: 167 tests over 2008 to 2017, or 2.7 for every 1,000 residents (2025 estimate), where Missouri as a whole comes to 9.3.
From Joplin to Cliff Village, CDC publishes no figure by town: each reads Newton County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Joplinextends beyond Newton County | 53,930 | +4.2% | Counted whole |
| Neosho | 14,078 | +10.6% | 22.6% |
| Seneca | 2,343 | +4.0% | 3.8% |
| Granby | 2,113 | +3.1% | 3.4% |
| Loma Linda | 1,009 | +6.9% | 1.6% |
| Diamond | 906 | +8.6% | 1.5% |
| Leawood | 643 | +3.5% | 1.0% |
| Fairview | 432 | +3.1% | 0.7% |
| Shoal Creek Drive | 381 | +6.7% | 0.6% |
| Saginaw | 333 | +11.0% | 0.5% |
| Newtonia | 215 | +3.4% | 0.3% |
| Stella | 170 | +3.0% | 0.3% |
- Redings Mill
- Stark City
- Grand Falls Plaza
- Shoal Creek Estates
- Wentworth
- Ritchey
- Dennis Acres
- Cliff Village
20 incorporated places, as listed in the U.S. Census Bureau’s 2020 place reference files. “(part)” marks a place that extends into another county. Residents: U.S. Census Bureau population estimates for July 1, 2025 (Vintage 2025). A place that extends beyond Newton County is counted whole, so it has no share.
Newton County, Homes
Homes in Newton County
Newton County is a place of houses on their own lots: 77% of its 24,762 homes are detached single-family houses, against 70% across Missouri. Half of its homes were built before 1984, close to Missouri's 1978: 22% date from before 1960 and 24% from 2000 or later. Owners live in 77% of the occupied homes (Missouri: 68%), so for most households a test and a fix are their own to order.
| Homes | Newton County | Missouri |
|---|---|---|
| Housing units | 24,762 | 2,809,501 |
| Detached houses | 77% | 70% |
| In buildings of 5 or more | 5% | 13% |
| Mobile homes | 13% | 5% |
| Built before 1960 | 22% | 28% |
| Built since 2000 | 24% | 21% |
| Middle year built | 1984 | 1978 |
| Owner-occupied | 77% | 68% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.