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 Stevens County, Minnesota
EPA puts Stevens County in Zone 1, its highest radon zone, and only 29 radon tests from it are on file with CDC (2023). Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Share at 4+ pCi/L
63.0%
19.6 pts above MN
- Stevens
- 63.0%
- Minnesota
- 43.4%
359 tests, 2008 to 2017
Median result
5.2pCi/L
Action level reached
- Stevens
- 5.2 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
359
52nd of 85 by tests
- Stevens
- 359
- Hennepin
- 35,213
Reported to CDC before any fix, 2008 to 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 Minnesota
29 of 85
Middle half
- Stevens
- 63.0%
- Rock
- 83.8%
By share, of 85 with 30+ tests
Read a result for Stevens County
Starts at Stevens County's median, 5.2 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 5.2 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. Stevens County's median reported result, 2008 to 2017.
The data
Stevens County, At a glance
Stevens County at a glance
Predicted: EPA radon zone
EPA Zone 1: highest predicted potential
EPA puts all of Stevens 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 Stevens County, 2023
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 61.4% |
| 2015 | 45.1% |
| 2016 | 51.6% |
| 2017 | 58.7% |
| 2018 | 43.6% |
| 2019 | 45.5% |
| 2020 | 60.0% |
| 2021 | 54.3% |
| 2022 | 24.2% |
| 2023 | 34.5% |
2023: 34.5%. Across these years the share ran from 24.2% to 61.4%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
Only 29 tests were reported to CDC for Stevens 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).
Stevens County, Compared
Stevens County radon figures, compared
Calculated by Radon411More than half: 63.0% of the 359 radon tests reported to CDC for Stevens County over the 2008 to 2017 laboratory totals read at least 4 pCi/L. That places it 29th of 85 Minnesota counties with 30 or more tests for the same period. That is 19.6 points above the 43.4% pooled from 87 Minnesota counties.
The newest figure, in 2023, counts only 29 tests (34.5% at or above 4 pCi/L), too few to compare, so this reading uses the 359-test figure.
The median result, 5.2 pCi/L, sits above EPA's 4 pCi/L action level, and the top reported result was 37.5 pCi/L. The rest split 16.7% under 2 pCi/L and 20.3% from 2 to 4 (Minnesota: 27.4% and 29.2%). Zone 1 on EPA's map (predicted average above 4 pCi/L) and a 63.0% share point the same way here.
2 of its 6 bordering counties with figures ran higher, led by Big Stone County at 67.0%; Pope County reported 49.2%. Statewide for the same period, Rock County reported the highest share (83.8%) and Anoka County the lowest (17.4%).
The busiest year on file was 2015, with 91 tests reported; the quietest, 2019, had 22.
Over 8 years of annual figures the share fell 37.2 points, from 61.4% in 2014 to 24.2% in 2022; its peak was 61.4% in 2014. Nationally, every county with a figure for the same period pools to 35.7%; Stevens County sits 27.3 points above it. CDC also counts 46 tests taken after mitigation in Stevens County for the same period: tests in homes where a fix was already in.
Stevens CountyMinnesota, pooled
| Year | Tests | Stevens County, at or above 4 pCi/L | Minnesota, pooled |
|---|---|---|---|
| 2014 | 44 | 61.4% | 42.9% |
| 2015 | 91 | 45.1% | 43.6% |
| 2016 | 91 | 51.6% | 37.0% |
| 2017 | 46 | 58.7% | 38.2% |
| 2018 | 39 | 43.6% | 38.3% |
| 2020 | 40 | 60.0% | 31.8% |
| 2021 | 35 | 54.3% | 33.1% |
| 2022 | 66 | 24.2% | 31.6% |
Pooled shares: Radon411's sum of CDC's county counts for one period.
Stevens County, State data
Minnesota's own radon test data
MeasuredWhat Minnesota's own agencies publish about radon tests in Stevens County, with their period. These are not CDC's figures and are never added to them.
MeasuredState figures, not CDC's
What the Minnesota Department of Health reports for Stevens County
Radon Testing (MN Public Health Data Access Portal): home radon tests reported voluntarily by private laboratories and licensed radon measurement professionals, counted by property. Period: 2016-2025.
Share with one or more tests at or above 4 pCi/L
60.7%
170 properties tested with one or more tests at or above 4 pCi/L
Median result
4.8 pCi/L
Average result
6.7 pCi/L
Tests behind these figures
28 properties tested a year on average
- MDH says these data do not include all of the radon tests conducted in Minnesota.
- Post-mitigation tests are excluded from the averages and the median; the percentages use each property's highest test.
- Each home is unique and can have very different results than a neighbor's home; the only way to know is to test.
- These figures describe tests reported to the Minnesota Department of Health in this area. They count a different set of tests than CDC's figures and are not a reading of any one home.
Measured: Minnesota Department of Health data, 2016-2025.
Stevens County, Geology
The ground under Stevens County
PredictedUSGS's geologic map puts all of Stevens County's mapped land in one class: high radon potential. All of it lies in the area the map calls Central Lowland-Till Prairie, to which USGS gives a radon index of 14, in the high band (12 to 17).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Central Lowland-Till Prairie | Silty and clayey till derived from shale and sandstone. | High | 14 | 100% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Stevens County beside the ground around it
Stevens County has more high-potential ground than Minnesota as a whole: 100% of its land against 61.1%. Of the 6 counties that border it, none has as large a share of high-potential ground; Big Stone County comes nearest at 100%.
The map rates the ground, not the air in any home.
Local help
Stevens County, Local resources
Radon testing and mitigation in Stevens County
- MDH Indoor Air UnitMDH Indoor Air Unit, run by MN Dept. of Health, licenses or certifies radon professionals and states the rule for disclosing radon when a home is sold, and answers questions about testing and mitigation in Minnesota.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 Minnesota255 professionals are listed in Minnesota.
What Minnesota's program says
- Phone
- 651-201-4601
- health.indoorair@state.mn.us
- Licensing of radon professionals
The Radon Licensing Act requires anyone who performs a radon test or radon mitigation, in a building they do not own or lease, must be licensed by MDH.
- Disclosure when a home is sold or rented
The Minnesota Radon Awareness Act requires specific disclosure and education be provided to potential home buyers during residential real estate transactions in Minnesota.
What it means
Stevens County, Questions
Questions about radon in Stevens County
Are radon levels high in Stevens County?
In 2023, 34.5% of the radon tests reported to CDC for Stevens County, Minnesota were at or above 4 pCi/L, and the median reported pre-mitigation result was 3.2 pCi/L. Of 85 Minnesota counties with 30 or more tests for the same period, 28 reported a higher share; pooled, the state comes to 43.4%.
Which counties border Stevens County?
Stevens County borders 6 counties: Grant County, Traverse County, Big Stone County, Pope County, Swift County and Douglas County.
Products
Stevens County, Products
Testing a home in Stevens County
In Stevens County, 63.0% of 359 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 43.4% pooled across Minnesota. In Zone 1 the year-round level in Stevens 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
Hello Radon C battery radon monitor with an e-ink screen
- C-NRPP 2024/25: Not included
- Battery
- Screen
Method: Alpha spectrometry
First reading: Within 24 hours
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
Stevens County is in EPA Zone 1, the highest predicted radon potential. Best radon monitors for Zone 1 counties like Stevens County
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Stevens County, Bordering counties
Counties bordering Stevens County
Calculated by Radon411- Radon levels in Big Stone CountyEPA zone 1
67.0%at or above 4 pCi/L
Median 5.0 pCi/L · 182 tests · 4.0 points above Stevens County
- Radon levels in Grant CountyEPA zone 1
63.7%at or above 4 pCi/L
Median 5.6 pCi/L · 135 tests · 0.7 points above Stevens County
- Radon levels in Douglas CountyEPA zone 1
62.1%at or above 4 pCi/L
Median 5.1 pCi/L · 1,424 tests · 0.9 points below Stevens County
- Radon levels in Traverse CountyEPA zone 1
56.5%at or above 4 pCi/L
Median 4.8 pCi/L · 62 tests · 6.5 points below Stevens County
- Radon levels in Swift CountyEPA zone 1
53.0%at or above 4 pCi/L
Median 4.3 pCi/L · 313 tests · 10.0 points below Stevens County
- Radon levels in Pope CountyEPA zone 1
49.2%at or above 4 pCi/L
Median 3.9 pCi/L · 830 tests · 13.8 points below Stevens County
Stevens County, Cities and towns
Cities and towns in Stevens County
The Census Bureau estimates 9,747 residents in Stevens County for July 1, 2025, 75 more than in 2020 (+0.8%). That works out to 17 people per square mile of land. Morris alone is home to 5,150 of them, 52.8% of the total. Together its 5 incorporated places hold 68.9% of those residents; the other 31.1% live outside any of them. Testing is reported here more often than across the state: CDC's 359 reported tests for 2008 to 2017 come to 36.8 for every 1,000 residents (2025 estimate), against 22.5 for Minnesota.
From Morris to Alberta, CDC publishes no figure by town: each reads Stevens County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Morris | 5,150 | +0.7% | 52.8% |
| Hancock | 846 | −0.2% | 8.7% |
| Chokio | 407 | +0.2% | 4.2% |
| Donnelly | 222 | Level | 2.3% |
| Alberta | 92 | Level | 0.9% |
5 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).
Stevens County, Homes
Homes in Stevens County
Stevens County is a place of houses on their own lots: 78% of its 4,201 homes are detached single-family houses, against 66% across Minnesota. The homes are older than Minnesota's as a whole: half were built before 1967 (1978 for Minnesota), and 43% date from before 1960. 67% of occupied homes are lived in by their owner (Minnesota: 72%); in the rest a tenant can run a test, but a fix is the landlord's to make.
| Homes | Stevens County | Minnesota |
|---|---|---|
| Housing units | 4,201 | 2,519,538 |
| Detached houses | 78% | 66% |
| In buildings of 5 or more | 14% | 19% |
| Mobile homes | 3% | 3% |
| Built before 1960 | 43% | 29% |
| Built since 2000 | 17% | 22% |
| Middle year built | 1967 | 1978 |
| Owner-occupied | 67% | 72% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.