Short-term kitempowerDX
Standard Radon Test short-term mail-in radon test kit
- Lab fee included
Method: Passive sampler
In home: 48 to 96 hours
Locations and reports
Radon Levels in Coffey County, Kansas
EPA puts Coffey County in Zone 2, its middle radon zone, and only 16 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
Highest bordering
38.0%
Lyon County
- Lyon
- 38.0%
- Franklin
- 21.2%
3 of 7 neighbours have 30+ tests, 2019
Nearest county
38.0%
Lyon County, 27 miles
- Lyon
- 38.0%
- Kansas
- 33.7%
Share at 4+ pCi/L, 50 tests, 2019
Ground above low
100.0%
Level with Kansas
- Coffey
- 100.0%
- Kansas
- 100.0%
Share of land USGS rates moderate or high potential
Tests reported
29
Too few for a share
- Coffey
- 29
- Needed
- 30
2020
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 Coffey 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
Coffey County, At a glance
Coffey County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Coffey 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 Coffey County, 2022
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2016 | 56.3% |
| 2017 | 35.3% |
| 2018 | 50.0% |
| 2019 | 16.7% |
| 2020 | 10.3% |
| 2021 | 0.0% |
| 2022 | 56.3% |
2022: 56.3%. Across these years the share ran from 0.0% to 56.3%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
Only 16 tests were reported to CDC for Coffey 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).
Coffey County, Compared
Coffey County radon figures, compared
Calculated by Radon411CDC's largest figure for Coffey County rests on 29 tests in 2020, 3 of them at or above 4 pCi/L, so each test moves its share by 3.4 points and no rank or comparison is drawn from it. Results reached as high as 16.2 pCi/L, with a middle value of 2.1 pCi/L.
Of the counties bordering it, 3 have a figure in 2019: Lyon County reported the largest share at or above 4 pCi/L, 38.0%, and Franklin County the smallest, 21.2%, with Osage County at 31.0% between. Farther out, Douglas County (51 miles away) at 23.6%, Miami County (54 miles away) at 35.0% and Shawnee County (56 miles away) at 29.0% have figures too. Pooled across 102 Kansas counties, 33.7% of reported tests reached that level; across every county in the country with a figure, 29.0%.
Statewide for the same period, Jewell County reported the highest share (71.9%) and Reno County the lowest (20.8%). EPA's 1993 map puts Coffey 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.
Coffey County, Geology
The ground under Coffey County
PredictedUSGS's geologic map puts all of Coffey County's mapped land in one class: moderate radon potential. All of it lies in the area the map calls Glaciated Area, to which USGS gives a radon index of 9, in the moderate band (9 to 11).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Glaciated Area | Glacial till underlain by Pennsylvanian and Permian marine and nonmarine sedimentary shale, sandstone, limestone, coal. | Moderate | 9 | 100% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Coffey County beside the ground around it
Across Kansas 59.9% of the land is rated high; none of Coffey County's is. Of the 7 counties that border it, none has as large a share of moderate-potential ground; Allen County comes nearest at 100%.
The map rates the ground, not the air in any home.
Local help
Coffey County, Local resources
Radon testing and mitigation in Coffey 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.
What Kansas's program says
- Phone
- (800) 693-5343
What it means
Coffey County, Questions
Questions about radon in Coffey County
Are radon levels high in Coffey County?
In 2022, 56.3% of the radon tests reported to CDC for Coffey County, Kansas were at or above 4 pCi/L, and the median reported pre-mitigation result was 5.0 pCi/L. Of the counties bordering it, 3 have a figure in 2019: Lyon County reported the largest share at or above 4 pCi/L, 38.0%, and Franklin County the smallest, 21.2%, with Osage County at 31.0% between.
Which counties border Coffey County?
Coffey County borders 7 counties: Woodson County, Osage County, Anderson County, Lyon County, Allen County, Franklin County and Greenwood County.
Products
Coffey County, Products
Testing a home in Coffey County
No CDC figure names Coffey County; the nearest county with one, Lyon County (27 miles away), reported 38.0% of its tests at or above 4 pCi/L in 2019, 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 Coffey 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
Monitor
EcoQube Wi-Fi continuous radon monitor
- C-NRPP 2024/25: Approved
- Plug-in
- Wi-Fi
- App only
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
Coffey County, Bordering counties
Counties bordering Coffey County
Calculated by Radon411- Radon levels in Anderson CountyEPA zone 2
50.0%at or above 4 pCi/L
Median 3.7 pCi/L · 22 tests
- Radon levels in Lyon CountyEPA zone 2
38.0%at or above 4 pCi/L
Median 2.7 pCi/L · 50 tests
- Radon levels in Osage CountyEPA zone 2
31.0%at or above 4 pCi/L
Median 2.5 pCi/L · 42 tests
- Radon levels in Franklin CountyEPA zone 2
21.2%at or above 4 pCi/L
Median 1.2 pCi/L · 113 tests
- Radon levels in Greenwood CountyEPA zone 2
16.7%at or above 4 pCi/L
Median 2.1 pCi/L · 6 tests
- Radon levels in Allen CountyEPA zone 2
14.3%at or above 4 pCi/L
Median 0.6 pCi/L · 7 tests
- Radon levels in Woodson CountyEPA zone 2
0.0%at or above 4 pCi/L
Median 2.4 pCi/L · 2 tests
Coffey County, Cities and towns
Cities and towns in Coffey County
The Census Bureau estimates 8,467 residents in Coffey County for July 1, 2025, 109 more than in 2020 (+1.3%). That works out to 14 people per square mile of land. Its largest town, Burlington, has 2,640 residents, 31.2% of the total. Together its 6 incorporated places hold 63.1% of those residents; the other 36.9% live outside any of them. Reported testing is thin here: 29 tests over 2020, or 3.4 for every 1,000 residents (2025 estimate), where Kansas as a whole comes to 7.7.
From Burlington to Gridley, CDC publishes no figure by town: each reads Coffey County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Burlington | 2,640 | +0.3% | 31.2% |
| Lebo | 918 | +3.5% | 10.8% |
| Waverly | 577 | −0.2% | 6.8% |
| LeRoy | 457 | +1.8% | 5.4% |
| New Strawn | 427 | +0.5% | 5.0% |
| Gridley | 321 | +1.9% | 3.8% |
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).
Coffey County, Homes
Homes in Coffey County
Coffey County is a place of houses on their own lots: 84% of its 3,985 homes are detached single-family houses, against 72% across Kansas. Half of its homes were built before 1971, close to Kansas' 1975: 39% date from before 1960 and 17% from 2000 or later. Owners live in 76% of the occupied homes (Kansas: 67%), so for most households a test and a fix are their own to order.
| Homes | Coffey County | Kansas |
|---|---|---|
| Housing units | 3,985 | 1,285,221 |
| Detached houses | 84% | 72% |
| In buildings of 5 or more | 3% | 13% |
| Mobile homes | 8% | 4% |
| Built before 1960 | 39% | 33% |
| Built since 2000 | 17% | 20% |
| Middle year built | 1971 | 1975 |
| Owner-occupied | 76% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.