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 Jewell County, Kansas
EPA puts Jewell County in Zone 1, its highest radon zone, and only 12 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
59.2%
21.9 pts above KS
- Jewell
- 59.2%
- Kansas
- 37.3%
49 tests, 2017
Median result
6.6pCi/L
Action level reached
- Jewell
- 6.6 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2017
Tests reported
49
33rd of 45 by tests
- Jewell
- 49
- Johnson
- 9,462
Reported to CDC before any fix, 2017
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
5 of 45
Top quarter
- Jewell
- 59.2%
- Sheridan
- 67.7%
By share, of 45 with 30+ tests
Read a result for Jewell County
Starts at Jewell County's median, 6.6 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 6.6 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. Jewell County's median reported result, 2017.
The data
Jewell County, At a glance
Jewell County at a glance
Predicted: EPA radon zone
EPA Zone 1: highest predicted potential
EPA puts all of Jewell 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 Jewell County, 2022
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2016 | 83.3% |
| 2017 | 59.2% |
| 2018 | 71.8% |
| 2019 | 71.9% |
| 2020 | 75.0% |
| 2021 | 100.0% |
| 2022 | 58.3% |
2022: 58.3%. Across these years the share ran from 58.3% to 100.0%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
Only 12 tests were reported to CDC for Jewell 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).
Jewell County, Compared
Jewell County radon figures, compared
Calculated by Radon411More than half: 59.2% of the 49 radon tests reported to CDC for Jewell County in 2017 read at least 4 pCi/L. That places it 5th of 45 Kansas counties with 30 or more tests for the same period. That is 21.9 points above the 37.3% pooled from 97 Kansas counties.
The newest figure, in 2022, counts only 12 tests (58.3% at or above 4 pCi/L), too few to compare, so this reading uses the 49-test figure.
The median result, 6.6 pCi/L, sits above EPA's 4 pCi/L action level, and the top reported result was 37.1 pCi/L. The rest split 18.4% under 2 pCi/L and 22.4% from 2 to 4 (Kansas: 39.5% and 23.2%). Zone 1 on EPA's map (predicted average above 4 pCi/L) and a 59.2% share point the same way here.
3 of its 6 bordering counties with figures ran higher, led by Webster County, NE at 84.6%; Republic County reported 51.5%. Statewide for the same period, Sheridan County reported the highest share (67.7%) and Reno County the lowest (21.6%).
The busiest year on file was 2017, with 49 tests reported; the quietest, 2020, had 4.
Over 3 years of annual figures the share rose 12.7 points, from 59.2% in 2017 to 71.9% in 2019; its peak was 71.9% in 2019. Nationally, every county with a figure for the same period pools to 31.7%; Jewell County sits 27.5 points above it. CDC also counts 11 tests taken after mitigation in Jewell County for the same period: tests in homes where a fix was already in.
Jewell CountyKansas, pooled
71.9% % of tests33.7% % of tests
| Year | Tests | Jewell County, at or above 4 pCi/L | Kansas, pooled |
|---|---|---|---|
| 2017 | 49 | 59.2% | 37.3% |
| 2018 | 39 | 71.8% | 37.3% |
| 2019 | 32 | 71.9% | 33.7% |
Pooled shares: Radon411's sum of CDC's county counts for one period.
Jewell County, Geology
The ground under Jewell County
PredictedUSGS's geologic map puts all of Jewell County's mapped land in one class: high radon potential. All of it lies in the area the map calls Smoky Hills, to which USGS gives 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 | 100% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Jewell County beside the ground around it
Jewell County has more high-potential ground than Kansas as a whole: 100% of its land against 59.9%. Of the 7 counties that border it, none has as large a share of high-potential ground; Cloud County comes nearest at 100%.
The map rates the ground, not the air in any home.
Local help
Jewell County, Local resources
Radon testing and mitigation in Jewell 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
Jewell County, Questions
Questions about radon in Jewell County
Are radon levels high in Jewell County?
In 2022, 58.3% of the radon tests reported to CDC for Jewell County, Kansas were at or above 4 pCi/L, and the median reported pre-mitigation result was 9.3 pCi/L. Of 45 Kansas counties with 30 or more tests for the same period, 4 reported a higher share; pooled, the state comes to 37.3%.
Which counties border Jewell County?
Jewell County borders 7 counties: Nuckolls County, NE, Mitchell County, KS, Webster County, NE, Republic County, KS, Smith County, KS, Cloud County, KS and Osborne County, KS.
Products
Jewell County, Products
Testing a home in Jewell County
In Jewell County, 59.2% of 49 tests reported to CDC in 2017 reached 4 pCi/L, against 37.3% pooled across Kansas. In Zone 1 the year-round level in Jewell 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
Monitor
Wave Radon battery smart radon monitor
- C-NRPP 2024/25: Not included
- Battery
- Bluetooth
- App only
Method: Alpha spectrometry
Short-term kitFirst Alert
RD1 short-term charcoal radon test kit
- Lab fee included
Method: Charcoal
In home: 2 to 4 days
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Jewell County is in EPA Zone 1, the highest predicted radon potential. Best radon monitors for Zone 1 counties like Jewell County
Explore
Jewell County, Bordering counties
Counties bordering Jewell County
Calculated by Radon411- Radon levels in Webster County, NEEPA zone 1
84.6%at or above 4 pCi/L
Median 6.0 pCi/L · 78 tests · 25.4 points above Jewell County
- Radon levels in Osborne County, KSEPA zone 1
75.0%at or above 4 pCi/L
Median 6.2 pCi/L · 12 tests · 15.8 points above Jewell County
- Radon levels in Smith County, KSEPA zone 1
63.0%at or above 4 pCi/L
Median 5.5 pCi/L · 46 tests · 3.8 points above Jewell County
- Radon levels in Mitchell County, KSEPA zone 1
60.0%at or above 4 pCi/L
Median 5.6 pCi/L · 60 tests · 0.8 points above Jewell County
- Radon levels in Cloud County, KSEPA zone 1
57.8%at or above 4 pCi/L
Median 5.3 pCi/L · 90 tests · 1.4 points below Jewell County
- Radon levels in Nuckolls County, NEEPA zone 1
56.7%at or above 4 pCi/L
Median 4.8 pCi/L · 90 tests · 2.5 points below Jewell County
- Radon levels in Republic County, KSEPA zone 1
51.5%at or above 4 pCi/L
Median 4.8 pCi/L · 33 tests · 7.7 points below Jewell County
Jewell County, Cities and towns
Cities and towns in Jewell County
About 2,830 people live in Jewell County by the Census Bureau's estimate for July 1, 2025, 98 fewer than in 2020 (−3.3%). Spread over its land, that is 3.1 people to the square mile. Its largest town, Mankato, has 803 residents, 28.4% of the total. Together its 7 incorporated places hold 55.0% of those residents; the other 45.0% live outside any of them. Testing is reported here more often than across the state: CDC's 49 reported tests for 2017 come to 17.3 for every 1,000 residents (2025 estimate), against 8.0 for Kansas.
From Mankato to Webber, CDC publishes no figure by town: each reads Jewell County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Mankato | 803 | −3.6% | 28.4% |
| Jewell | 345 | −3.1% | 12.2% |
| Burr Oak | 136 | −3.5% | 4.8% |
| Formoso | 90 | −3.2% | 3.2% |
| Randall | 84 | −2.3% | 3.0% |
| Esbon | 67 | −2.9% | 2.4% |
| Webber | 31 | −3.1% | 1.1% |
7 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).
Jewell County, Homes
Homes in Jewell County
Jewell County is a place of houses on their own lots: 86% of its 1,760 homes are detached single-family houses, against 72% across Kansas. More than half of its homes were built before 1940, where the middle year for Kansas is 1975; 6% have gone up since 2000. Owners live in 81% of the occupied homes (Kansas: 67%), so for most households a test and a fix are their own to order.
| Homes | Jewell County | Kansas |
|---|---|---|
| Housing units | 1,760 | 1,285,221 |
| Detached houses | 86% | 72% |
| In buildings of 5 or more | 1% | 13% |
| Mobile homes | 8% | 4% |
| Built before 1960 | 63% | 33% |
| Built since 2000 | 6% | 20% |
| Middle year built | 1939 or earlier | 1975 |
| Owner-occupied | 81% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.