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 Christian County, Missouri
EPA puts Christian County in Zone 2, its middle radon zone, and only 23 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
31.6%
0.8 pts above MO
- Christian
- 31.6%
- Missouri
- 30.8%
452 tests, 2007 to 2016
Median result
1.9pCi/L
Below action level
- Christian
- 1.9 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2007 to 2016
Tests reported
452
15th of 72 by tests
- Christian
- 452
- St. Louis
- 16,567
Reported to CDC before any fix, 2007 to 2016
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
- Christian
- 31.6%
- Atchison
- 70.5%
By share, of 72 with 30+ tests
Read a result for Christian County
Starts at Christian County's median, 1.9 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 1.9 pCi/L
Below 2 pCi/L
- Under 20 to 1.9 pCi/L
- 2 to 4consider a fix
- 4 and aboveEPA says fix it
This result is below 2 pCi/L, the level at which EPA says a fix should be considered. Christian County's median reported result, 2007 to 2016.
The data
Christian County, At a glance
Christian County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Christian 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 Christian County, 2023
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 25.9% |
| 2015 | 32.4% |
| 2016 | 30.0% |
| 2017 | 21.4% |
| 2018 | 71.4% |
| 2019 | 40.0% |
| 2020 | 27.3% |
| 2021 | 33.3% |
| 2022 | 34.7% |
| 2023 | 43.5% |
2023: 43.5%. Across these years the share ran from 21.4% to 71.4%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
Only 23 tests were reported to CDC for Christian 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).
Christian County, Compared
Christian County radon figures, compared
Calculated by Radon411In Christian County, about 3 in 10 reported tests over the 2007 to 2016 laboratory totals (143 of 452) were at or above EPA's action level. Against the national pool of 35.8%, the gap is 4.2 points lower. Across 115 Missouri counties pooled together, 30.8% of tests reached that level, so Christian County runs 0.8 points above its state.
The newest figure, in 2023, counts only 23 tests (43.5% at or above 4 pCi/L), too few to compare, so this reading uses the 452-test figure.
Of 5 neighbours with a figure, 3 reported a larger share at or above 4 pCi/L and 2 a smaller one; the spread is 21.6% (Webster County) to 41.7% (Stone County). By share, Christian County is 36th of 72 Missouri counties with 30 or more tests for the same period.
Year by year, 2015 opened at 32.4% and 2022 closed at 34.7% (up 2.3 points), with 2022 the high at 34.7%. Half the tests came in under 1.9 pCi/L and half over it; the single highest reached 99.9 pCi/L. Below the action level, 228 tests (50.4%) came in under 2 pCi/L, against 41.2% statewide, and 81 tests (17.9%) fell between 2 and 4, against 27.9% statewide.
Zone 2 on EPA's map (predicted average between 2 and 4 pCi/L) and a 31.6% share point the same way here. USGS geology rates 100% of the county's land moderate radon potential. CDC also counts 8 tests taken after mitigation in Christian County for the same period: tests in homes where a fix was already in.
The busiest year on file was 2022, with 49 tests reported; the quietest, 2019, had 5.
Christian CountyMissouri, pooled
| Year | Tests | Christian County, at or above 4 pCi/L | Missouri, pooled |
|---|---|---|---|
| 2015 | 37 | 32.4% | 27.6% |
| 2020 | 33 | 27.3% | 33.2% |
| 2022 | 49 | 34.7% | 40.8% |
Pooled shares: Radon411's sum of CDC's county counts for one period.
Christian County, Geology
The ground under Christian County
PredictedUSGS's geologic map puts all of Christian County's mapped land in one class: moderate radon potential. The map puts 65.7% of Christian County in the area it calls Springfield Plateau and 34.3% 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 | 65.7% |
| Salem Plateau | Ordovician dolomite, sandstone, limestone, and shale. | Moderate | 11 | 34.3% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Christian County beside the ground around it
Across Missouri 8.2% of the land is rated high; none of Christian County's is. Of the 6 counties that border it, none has as large a share of moderate-potential ground; Lawrence County comes nearest at 100%.
The map rates the ground, not the air in any home.
Local help
Christian County, Local resources
Radon testing and mitigation in Christian 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
Christian County, Questions
Questions about radon in Christian County
Are radon levels high in Christian County?
In 2023, 43.5% of the radon tests reported to CDC for Christian County, Missouri were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.7 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 30.8%.
Which counties border Christian County?
Christian County borders 6 counties: Taney County, Greene County, Stone County, Webster County, Douglas County and Lawrence County.
Products
Christian County, Products
Testing a home in Christian County
In Christian County, 31.6% of 452 tests reported to CDC over the 2007 to 2016 laboratory totals reached 4 pCi/L, against 30.8% pooled across Missouri. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Christian 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
MonitorAEGTEST
HOUND-1011S rechargeable radon detector with a screen
- C-NRPP 2024/25: Not included
- Battery
- Alarm
- Screen
Method: Semiconductor sensor
First reading: Within 12 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Christian County, Bordering counties
Counties bordering Christian County
Calculated by Radon411- Radon levels in Stone CountyEPA zone 2
41.7%at or above 4 pCi/L
Median 2.9 pCi/L · 132 tests · 10.1 points above Christian County
- Radon levels in Taney CountyEPA zone 2
34.7%at or above 4 pCi/L
Median 2.8 pCi/L · 144 tests · 3.1 points above Christian County
- Radon levels in Greene CountyEPA zone 2
33.9%at or above 4 pCi/L
Median 2.5 pCi/L · 1,453 tests · 2.3 points above Christian County
- Radon levels in Lawrence CountyEPA zone 2
23.5%at or above 4 pCi/L
Median 1.7 pCi/L · 68 tests · 8.1 points below Christian County
- Radon levels in Webster CountyEPA zone 2
21.6%at or above 4 pCi/L
Median 1.6 pCi/L · 102 tests · 10.0 points below Christian County
- Radon levels in Douglas CountyEPA zone 2
0.0%at or above 4 pCi/L
Median 1.2 pCi/L · 3 tests · 31.6 points below Christian County
Christian County, Cities and towns
Cities and towns in Christian County
Christian County is growing: the Census Bureau puts it at 96,725 residents on July 1, 2025, up 8.3% from 89,291 in 2020. That works out to 172 people per square mile of land. Springfield, the largest place on its list (169,847 residents in all), extends beyond Christian County, so no share of the total is worked out for it. Reported testing is thin here: 452 tests over 2007 to 2016, or 4.7 for every 1,000 residents (2025 estimate), where Missouri as a whole comes to 8.8.
From Springfield to Saddlebrooke, CDC publishes no figure by town: each reads Christian County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Springfieldextends beyond Christian County | 169,847 | +0.4% | Counted whole |
| Nixa | 26,597 | +13.5% | 27.5% |
| Ozark | 23,544 | +10.0% | 24.3% |
| Republicextends beyond Christian County | 22,404 | +19.5% | Counted whole |
| Clever | 3,143 | +7.0% | 3.2% |
| Sparta | 1,953 | +4.5% | 2.0% |
| Billings | 1,182 | +8.1% | 1.2% |
| Fremont Hills | 1,098 | +4.7% | 1.1% |
| Highlandville | 974 | +1.2% | 1.0% |
| Saddlebrookeextends beyond Christian County | 315 | +4.3% | Counted whole |
Places in Christian County with a city page: 1 of 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). A place that extends beyond Christian County is counted whole, so it has no share.
Christian County, Homes
Homes in Christian County
Christian County is a place of houses on their own lots: 81% of its 35,972 homes are detached single-family houses, against 70% across Missouri. Much of Christian County is recent building: 47% of its homes have gone up since 2000 and the middle year built is 1999, against 1978 for Missouri. 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 | Christian County | Missouri |
|---|---|---|
| Housing units | 35,972 | 2,809,501 |
| Detached houses | 81% | 70% |
| In buildings of 5 or more | 5% | 13% |
| Mobile homes | 3% | 5% |
| Built before 1960 | 7% | 28% |
| Built since 2000 | 47% | 21% |
| Middle year built | 1999 | 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.