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
Locations and reports
Radon Levels in Logan County, Kansas
EPA puts Logan County in Zone 1, its highest radon zone, and only 9 radon tests from it are on file with CDC (2022). Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Share at 4+ pCi/L
55.9%
24.1 pts above KS
- Logan
- 55.9%
- Kansas
- 31.8%
102 tests, 2021
Median result
4.6pCi/L
Action level reached
- Logan
- 4.6 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2021
Tests reported
102
33rd of 62 by tests
- Logan
- 102
- Johnson
- 25,860
Reported to CDC before any fix, 2021
EPA radon zone
Zone 1
Highest potential
- Zone 1
- 2
- 3
1 highest, 3 lowest
EPA predicts over 4 pCi/L indoors
Rank in Kansas
14 of 62
Top quarter
- Logan
- 55.9%
- Norton
- 93.8%
By share, of 62 with 30+ tests
Read a result for Logan County
Starts at Logan County's median, 4.6 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 4.6 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. Logan County's median reported result, 2021.
The data
Logan County, At a glance
Logan County at a glance
Predicted: EPA radon zone
EPA Zone 1: highest predicted potential
EPA puts all of Logan County in
USGS geologic potential: High across 100% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Logan County, 2022
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2016 | 69.6% |
| 2017 | 65.9% |
| 2018 | 53.5% |
| 2019 | 28.6% |
| 2020 | 64.7% |
| 2021 | 55.9% |
| 2022 | 55.6% |
2022: 55.6%. Across these years the share ran from 28.6% to 69.6%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
Only 9 tests were reported to CDC for Logan County over 2022, 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: 2022. Measured data period: 2016 to 2022 (every CDC figure on file).
Logan County, Compared
Logan County radon figures, compared
Calculated by Radon411More than half: 55.9% of the 102 radon tests reported to CDC for Logan County in 2021 read at least 4 pCi/L. That places it 14th of 62 Kansas counties with 30 or more tests for the same period. That is 24.1 points above the 31.8% pooled from 96 Kansas counties.
The newest figure, in 2022, counts only 9 tests (55.6% at or above 4 pCi/L), too few to compare, so this reading uses the 102-test figure.
The median result, 4.6 pCi/L, sits above EPA's 4 pCi/L action level, and the top reported result was 22.0 pCi/L. The rest split 35.3% under 2 pCi/L and 8.8% from 2 to 4 (Kansas: 45.3% and 22.9%). Zone 1 on EPA's map (predicted average above 4 pCi/L) and a 55.9% share point the same way here.
All 2 of its bordering counties with figures ran higher, led by Sherman County at 61.1%; the lowest of them, Thomas County, reported 56.3%. Statewide for the same period, Norton County reported the highest share (93.8%) and Doniphan County the lowest (0.0%).
The busiest year on file was 2021, with 102 tests reported; the quietest, 2019, had 7.
Over 3 years of annual figures the share fell 10.0 points, from 65.9% in 2017 to 55.9% in 2021; its peak was 65.9% in 2017. Nationally, every county with a figure for the same period pools to 24.4%; Logan County sits 31.5 points above it. CDC also counts 15 tests taken after mitigation in Logan County for the same period: tests in homes where a fix was already in.
Logan CountyKansas, pooled
55.9% % of tests31.8% % of tests
| Year | Tests | Logan County, at or above 4 pCi/L | Kansas, pooled |
|---|---|---|---|
| 2017 | 41 | 65.9% | 37.3% |
| 2018 | 43 | 53.5% | 37.3% |
| 2021 | 102 | 55.9% | 31.8% |
Pooled shares: Radon411's sum of CDC's county counts for one period.
Logan County, Geology
The ground under Logan County
PredictedUSGS's geologic map puts all of Logan County's mapped land in one class: high radon potential. The map puts 61.4% of Logan County in the area it calls Smoky Hills and 38.6% in Ogallala Formation. USGS gives both a radon index of 12, in the high band (12 to 17).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Smoky Hills | Cretaceous marine sandstone, shale, and siltstone covered by discontinuous loess deposits. | High | 12 | 61.4% |
| Ogallala Formation | Tertiary sandstone, in part covered by windblown eolian sand and loess deposits. | High | 12 | 38.6% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Logan County beside the ground around it
Logan County has more high-potential ground than Kansas as a whole: 100% of its land against 59.9%. Of the 6 counties that border it, none has as large a share of high-potential ground; Gove County comes nearest at 100%.
The map rates the ground, not the air in any home.
Local help
Logan County, Local resources
Radon testing and mitigation in Logan County
- Kansas Radon ProgramKansas Radon Program answers questions about testing, mitigation and the rules in Kansas.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsAsk the program whether it has free or discounted kits, or compare kits you can buy.
- Compare kits
- Professionals in Kansas178 professionals are listed in Kansas.
Listed radon professionals by town: Oakley
What Kansas's program says
- Phone
- (800) 693-5343
What it means
Logan County, Questions
Questions about radon in Logan County
Are radon levels high in Logan County?
In 2022, 55.6% of the radon tests reported to CDC for Logan County, Kansas were at or above 4 pCi/L, and the median reported pre-mitigation result was 4.3 pCi/L. Of 62 Kansas counties with 30 or more tests for the same period, 13 reported a higher share; pooled, the state comes to 31.8%.
Which counties border Logan County?
Logan County borders 6 counties: Thomas County, Wichita County, Scott County, Wallace County, Gove County and Sherman County.
Products
Logan County, Products
Testing a home in Logan County
In Logan County, 55.9% of 102 tests reported to CDC in 2021 reached 4 pCi/L, against 31.8% pooled across Kansas. In Zone 1 the year-round level in Logan County is the one to know: a long-term test (more than 90 days) or a monitor, with a short-term kit for a first answer.
Test kits and monitors3
See every kit and monitor
MonitorAranet
Radon Plus battery digital radon monitor with an e-ink screen
- C-NRPP 2024/25: Approved
- Battery
- Bluetooth
- Alarm
- Screen, app
Method: Ion chamber
First reading: Within 10 minutes
Short-term kit
RA100 short-term liquid scintillation radon test kit
- Lab fee extra
Method: Liquid scintillation
In home: 48 to 96 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Logan County is in EPA Zone 1, the highest predicted radon potential. Best radon monitors for Zone 1 counties like Logan County
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Logan County, Bordering counties
Counties bordering Logan County
Calculated by Radon411- Radon levels in Wichita CountyEPA zone 1
100.0%at or above 4 pCi/L
Median 4.4 pCi/L · 3 tests · 44.1 points above Logan County
- Radon levels in Wallace CountyEPA zone 1
100.0%at or above 4 pCi/L
Median 10.7 pCi/L · 6 tests · 44.1 points above Logan County
- Radon levels in Gove CountyEPA zone 1
75.0%at or above 4 pCi/L
Median 5.2 pCi/L · 12 tests · 19.1 points above Logan County
- Radon levels in Sherman CountyEPA zone 1
61.1%at or above 4 pCi/L
Median 5.0 pCi/L · 108 tests · 5.2 points above Logan County
- Radon levels in Thomas CountyEPA zone 1
56.3%at or above 4 pCi/L
Median 4.2 pCi/L · 48 tests · 0.4 points above Logan County
- Radon levels in Scott CountyEPA zone 1
37.5%at or above 4 pCi/L
Median 3.8 pCi/L · 24 tests · 18.4 points below Logan County
Logan County, Cities and towns
Cities and towns in Logan County
About 2,661 people live in Logan County by the Census Bureau's estimate for July 1, 2025, 81 fewer than in 2020 (−3.0%). Spread over its land, that is 2.5 people to the square mile. Oakley, the largest place on its list (1,974 residents in all), extends beyond Logan County, so no share of the total is worked out for it. Testing is reported here more often than across the state: CDC's 102 reported tests for 2021 come to 38.3 for every 1,000 residents (2025 estimate), against 23.5 for Kansas.
From Oakley to Russell Springs, CDC publishes no figure by town: each reads Logan County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Oakleyextends beyond Logan County | 1,974 | −2.9% | Counted whole |
| Winona | 183 | −3.2% | 6.9% |
| Russell Springs | 26 | −3.7% | 1.0% |
3 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 Logan County is counted whole, so it has no share.
Logan County, Homes
Homes in Logan County
Logan County is a place of houses on their own lots: 86% of its 1,372 homes are detached single-family houses, against 72% across Kansas. The homes are older than Kansas' as a whole: half were built before 1961 (1975 for Kansas), and 49% date from before 1960. 61% of occupied homes are lived in by their owner (Kansas: 67%); in the rest a tenant can run a test, but a fix is the landlord's to make.
| Homes | Logan County | Kansas |
|---|---|---|
| Housing units | 1,372 | 1,285,221 |
| Detached houses | 86% | 72% |
| In buildings of 5 or more | 1% | 13% |
| Mobile homes | 6% | 4% |
| Built before 1960 | 49% | 33% |
| Built since 2000 | 6% | 20% |
| Middle year built | 1961 | 1975 |
| Owner-occupied | 61% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.