
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
EPA puts Stanton County in Zone 1, its highest radon zone, and only 2 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
Nearest county
52.2%
Seward County, 57 miles
Share at 4+ pCi/L, 92 tests, 2019
Ground above low
100.0%
Level with Kansas
Share of land USGS rates moderate or high potential
Tests reported
3
Too few for a share
2021
EPA radon zone
Zone 1
Highest potential
1 highest, 3 lowest
EPA predicts over 4 pCi/L indoors
Read a result for Stanton County
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
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
Stanton County, At a glance
Predicted: EPA radon zone
EPA puts all of Stanton County in
USGS geologic potential: High across 100% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2016 | 50.0% |
| 2018 | 0.0% |
| 2019 | 0.0% |
| 2020 | 50.0% |
| 2021 | 100.0% |
| 2022 | 0.0% |
2022: 0.0%. Across these years the share ran from 0.0% to 100.0%. Each column counts radon tests reported to CDC that year, not homes.
Only 2 tests were reported to CDC for Stanton 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).
Stanton County, Compared
CDC's largest figure for Stanton County rests on 3 tests in 2021, 3 of them at or above 4 pCi/L, so each test moves its share by 33.3 points and no rank or comparison is drawn from it. Results reached as high as 4.7 pCi/L, with a middle value of 4.7 pCi/L.
The nearest counties with a figure are Seward County (57 miles away) at 52.2%, Finney County (66 miles away) at 30.1% and Scott County (79 miles away) at 61.5%. 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 Stanton County in Zone 1, the map's highest label: a predicted county average above 4 pCi/L. USGS geology rates 100% of the county's land high radon potential.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Stanton County, Geology
USGS's geologic map puts all of Stanton County's mapped land in one class: high radon potential. All of it lies in the area the map calls Ogallala Formation, 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 |
|---|---|---|---|---|
| Ogallala Formation | Tertiary sandstone, in part covered by windblown eolian sand and 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.
Stanton 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; Prowers County, CO comes nearest at 98.1%.
The map rates the ground, not the air in any home.
Local help
Stanton County, Local resources
What it means
Stanton County, Questions
In 2022, 0.0% of the radon tests reported to CDC for Stanton County, Kansas were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.3 pCi/L. Of the 8 nearest counties with a figure, within 163 miles, the share of tests at or above 4 pCi/L runs from 30.1% to 66.7%.
Stanton County borders 7 counties: Morton County, KS, Grant County, KS, Stevens County, KS, Hamilton County, KS, Kearny County, KS, Baca County, CO and Prowers County, CO.
Products
Stanton County, Products
No CDC figure names Stanton County; the nearest county with one, Seward County (57 miles away), reported 52.2% of its tests at or above 4 pCi/L in 2019, the only reading nearby until a test of this home. In Zone 1 the year-round level in Stanton 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 monitors: 1 of 3
Stanton County is in EPA Zone 1, the highest predicted radon potential. Best radon monitors for Zone 1 counties like Stanton County
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Stanton County, Bordering counties
75.0%at or above 4 pCi/L
Median 5.8 pCi/L · 16 tests
66.7%at or above 4 pCi/L
Median 5.2 pCi/L · 3 tests
62.5%at or above 4 pCi/L
Median 5.5 pCi/L · 8 tests
55.6%at or above 4 pCi/L
Median 4.2 pCi/L · 18 tests
36.0%at or above 4 pCi/L
Median 2.6 pCi/L · 25 tests
0.0%at or above 4 pCi/L
Median 1.6 pCi/L · 4 tests
0.0%at or above 4 pCi/L
Median 3.1 pCi/L · 2 tests
Stanton County, Cities and towns
About 1,986 people live in Stanton County by the Census Bureau's estimate for July 1, 2025, 93 fewer than in 2020 (−4.5%). Spread over its land, that is 2.9 people to the square mile. Johnson City alone is home to 1,402 of them, 70.6% of the total. Together its 2 incorporated places hold 76.9% of those residents; the other 23.1% live outside any of them. Reported testing is thin here: 3 tests over 2021, or 1.5 for every 1,000 residents (2025 estimate), where Kansas as a whole comes to 23.5.
From Johnson City to Manter, CDC publishes no figure by town: each reads Stanton County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Johnson City | 1,402 | −4.3% | 70.6% |
| Manter | 125 | −3.8% | 6.3% |
2 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).
Stanton County, Homes
Of Stanton County's 1,014 homes, 68% are detached houses, against 72% across Kansas; 31% are mobile homes. The homes are older than Kansas' as a whole: half were built before 1967 (1975 for Kansas), and 34% date from before 1960. 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 | Stanton County | Kansas |
|---|---|---|
| Housing units | 1,014 | 1,285,221 |
| Detached houses | 68% | 72% |
| In buildings of 5 or more | under 1% | 13% |
| Mobile homes | 31% | 4% |
| Built before 1960 | 34% | 33% |
| Built since 2000 | 11% | 20% |
| Middle year built | 1967 | 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.