Short-term kit
Radon Short Term Test Kit short-term charcoal radon test kit, lab fee included
- Lab fee included
Method: Charcoal
In home: 2 to 7 days
Locations and reports
Radon Levels in Gentry County, Missouri
EPA puts Gentry 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
60.8%
Andrew County
- Andrew
- 60.8%
- DeKalb
- 24.2%
4 of 6 neighbours have 30+ tests, 2008 to 2017
Nearest county
24.2%
DeKalb County, 22 miles
- DeKalb
- 24.2%
- Missouri
- 30.6%
Share at 4+ pCi/L, 33 tests, 2008 to 2017
Ground above low
100.0%
5.8 pts above Missouri
- Gentry
- 100.0%
- Missouri
- 94.2%
Share of land USGS rates moderate or high potential
Tests reported
24
Too few for a share
- Gentry
- 24
- 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 Gentry 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
Gentry County, At a glance
Gentry County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Gentry 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 Gentry County, 2023
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 20.0% |
| 2015 | 33.3% |
| 2016 | 0.0% |
| 2018 | 100.0% |
| 2021 | 50.0% |
| 2022 | 0.0% |
| 2023 | 100.0% |
2023: 100.0%. Across these years the share ran from 0.0% to 100.0%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
Only 1 test was reported to CDC for Gentry 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).
Gentry County, Compared
Gentry County radon figures, compared
Calculated by Radon411CDC's largest figure for Gentry County rests on 24 tests over the 2008 to 2017 laboratory totals, 10 of them at or above 4 pCi/L, so each test moves its share by 4.2 points and no rank or comparison is drawn from it. Results reached as high as 37.6 pCi/L, with a middle value of 3.5 pCi/L.
Of the counties bordering it, 4 have a figure over the 2008 to 2017 laboratory totals: Andrew County reported the largest share at or above 4 pCi/L, 60.8%, and DeKalb County the smallest, 24.2%, with Nodaway County at 34.2% and Daviess County at 26.7% between. Farther out, Clinton County (42 miles away) at 38.1%, Buchanan County (44 miles away) at 52.9% and Livingston County (54 miles away) at 22.4% 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 Gentry 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.
Gentry County, Geology
The ground under Gentry County
PredictedUSGS's geologic map puts all of Gentry County's mapped land in one class: moderate radon potential. All of it lies in the area the map calls Dissected Till Plains, 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 |
|---|---|---|---|---|
| Dissected Till Plains | Till-covered Pennsylvanian sandstone, shale, and limestone. | 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.
Gentry County beside the ground around it
Across Missouri 8.2% of the land is rated high; none of Gentry County's is. Of the 6 counties that border it, 5 have more high-potential ground, Andrew County the most at 91.5%.
The map rates the ground, not the air in any home.
Local help
Gentry County, Local resources
Radon testing and mitigation in Gentry 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
Gentry County, Questions
Questions about radon in Gentry County
Are radon levels high in Gentry County?
In 2023, 100.0% of the radon tests reported to CDC for Gentry County, Missouri were at or above 4 pCi/L, and the median reported pre-mitigation result was 4.4 pCi/L. Of the counties bordering it, 4 have a figure over the 2008 to 2017 laboratory totals: Andrew County reported the largest share at or above 4 pCi/L, 60.8%, and DeKalb County the smallest, 24.2%, with Nodaway County at 34.2% and Daviess County at 26.7% between.
Which counties border Gentry County?
Gentry County borders 6 counties: Worth County, Harrison County, DeKalb County, Nodaway County, Andrew County and Daviess County.
Products
Gentry County, Products
Testing a home in Gentry County
No CDC figure names Gentry County; the nearest county with one, DeKalb County (22 miles away), reported 24.2% 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 Gentry 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
MonitorINKBIRD
INK-RD3 battery radon monitor with an e-ink screen
- C-NRPP 2024/25: Not included
- Battery
- Screen
First reading: Within 24 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Gentry County, Bordering counties
Counties bordering Gentry County
Calculated by Radon411- Radon levels in Andrew CountyEPA zone 1
60.8%at or above 4 pCi/L
Median 4.9 pCi/L · 158 tests
- Radon levels in Nodaway CountyEPA zone 1
34.2%at or above 4 pCi/L
Median 2.7 pCi/L · 225 tests
- Radon levels in Harrison CountyEPA zone 2
29.2%at or above 4 pCi/L
Median 1.9 pCi/L · 24 tests
- Radon levels in Daviess CountyEPA zone 2
26.7%at or above 4 pCi/L
Median 2.0 pCi/L · 30 tests
- Radon levels in DeKalb CountyEPA zone 2
24.2%at or above 4 pCi/L
Median 2.3 pCi/L · 33 tests
- Radon levels in Worth CountyEPA zone 2
9.1%at or above 4 pCi/L
Median 1.5 pCi/L · 11 tests
Gentry County, Cities and towns
Cities and towns in Gentry County
The Census Bureau estimates 6,384 residents in Gentry County for July 1, 2025, 255 more than in 2020 (+4.2%). That works out to 13 people per square mile of land. Its largest town, Albany, has 1,730 residents, 27.1% of the total. Together its 6 incorporated places hold 62.5% of those residents; the other 37.5% live outside any of them. Reported testing is thin here: 24 tests over 2008 to 2017, or 3.8 for every 1,000 residents (2025 estimate), where Missouri as a whole comes to 9.3.
From Albany to Gentry, CDC publishes no figure by town: each reads Gentry County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Albany | 1,730 | +3.8% | 27.1% |
| Stanberry | 1,168 | +3.8% | 18.3% |
| King City | 845 | +6.0% | 13.2% |
| McFall | 120 | +4.3% | 1.9% |
| Darlington | 68 | +3.0% | 1.1% |
| Gentry | 59 | +3.5% | 0.9% |
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).
Gentry County, Homes
Homes in Gentry County
Gentry County is a place of houses on their own lots: 80% of its 2,928 homes are detached single-family houses, against 70% across Missouri. Half of its homes were built before 1973, close to Missouri's 1978: 33% date from before 1960 and 19% 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 | Gentry County | Missouri |
|---|---|---|
| Housing units | 2,928 | 2,809,501 |
| Detached houses | 80% | 70% |
| In buildings of 5 or more | 3% | 13% |
| Mobile homes | 8% | 5% |
| Built before 1960 | 33% | 28% |
| Built since 2000 | 19% | 21% |
| Middle year built | 1973 | 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.