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 Wilkin County, Minnesota
EPA puts Wilkin County in Zone 1, its highest radon zone, and only 27 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
38.3%
5.8 pts below MN
- Wilkin
- 38.3%
- Minnesota
- 44.1%
81 tests, 2007 to 2016
Median result
3.1pCi/L
Below action level
- Wilkin
- 3.1 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2007 to 2016
Tests reported
81
80th of 86 by tests
- Wilkin
- 81
- Hennepin
- 32,628
Reported to CDC before any fix, 2007 to 2016
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
66 of 86
Lowest quarter
- Wilkin
- 38.3%
- Rock
- 84.6%
By share, of 86 with 30+ tests
Read a result for Wilkin County
Starts at Wilkin County's median, 3.1 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 3.1 pCi/L
Between 2 and 4 pCi/L
- Under 20 to 1.9 pCi/L
- 2 to 4consider a fix
- 4 and aboveEPA says fix it
This result is between 2 and 4 pCi/L. EPA recommends considering a fix when the level is between 2 and 4 pCi/L. Wilkin County's median reported result, 2007 to 2016.
The data
Wilkin County, At a glance
Wilkin County at a glance
Predicted: EPA radon zone
EPA Zone 1: highest predicted potential
EPA puts all of Wilkin 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 Wilkin County, 2023
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 43.2% |
| 2015 | 50.0% |
| 2016 | 37.5% |
| 2017 | 50.0% |
| 2018 | 53.3% |
| 2019 | 70.0% |
| 2020 | 28.6% |
| 2021 | 73.3% |
| 2022 | 57.7% |
| 2023 | 48.1% |
2023: 48.1%. Across these years the share ran from 28.6% to 73.3%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
Only 27 tests were reported to CDC for Wilkin 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).
Wilkin County, Compared
Wilkin County radon figures, compared
Calculated by Radon411In Wilkin County, about 4 in 10 reported tests over the 2007 to 2016 laboratory totals (31 of 81) were at or above EPA's action level. Against the national pool of 35.8%, the gap is 2.5 points higher. Across 87 Minnesota counties pooled together, 44.1% of tests reached that level, so Wilkin County runs 5.8 points below its state.
The newest figure, in 2023, counts only 27 tests (48.1% at or above 4 pCi/L), too few to compare, so this reading uses the 81-test figure.
Of 5 neighbours with a figure, all 5 reported a larger share at or above 4 pCi/L; the spread is 39.0% (Richland County, ND) to 63.8% (Grant County). By share, Wilkin County is 66th of 86 Minnesota counties with 30 or more tests for the same period.
Half the tests came in under 3.1 pCi/L and half over it; the single highest reached 21.2 pCi/L. Below the action level, 23 tests (28.4%) came in under 2 pCi/L, against 26.9% statewide, and 27 tests (33.3%) fell between 2 and 4, against 29.0% statewide.
Zone 1 on EPA's map (predicted average above 4 pCi/L) and a 38.3% share point the same way here. USGS geology rates 100% of the county's land high radon potential.
The busiest year on file was 2014, with 44 tests reported; the quietest, 2017, had 4.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Wilkin County, State data
Minnesota's own radon test data
MeasuredWhat Minnesota's own agencies publish about radon tests in Wilkin 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 Wilkin 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
52.8%
67 properties tested with one or more tests at or above 4 pCi/L
Median result
3.9 pCi/L
Average result
5.3 pCi/L
Tests behind these figures
13 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.
Wilkin County, Geology
The ground under Wilkin County
PredictedUSGS's geologic map puts all of Wilkin County's mapped land in one class: high radon potential. The map puts 74.7% of Wilkin County in the area it calls Central Lowland-Till Prairie and 25.1% in Lake Agassiz Plain. USGS gives the first a radon index of 14 and the second 15, both 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 | 74.7% |
| Lake Agassiz Plain | Silt and clay deposits of Glacial Lake Agassiz derived from Cretaceous shales containing higher than average amounts of uranium. | High | 15 | 25.1% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Wilkin County beside the ground around it
Wilkin County has more high-potential ground than Minnesota as a whole: 100% of its land against 61.1%. Of the 5 counties that border it, none has as large a share of high-potential ground; Otter Tail County comes nearest at 100%.
The map rates the ground, not the air in any home.
Local help
Wilkin County, Local resources
Radon testing and mitigation in Wilkin 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
Wilkin County, Questions
Questions about radon in Wilkin County
Are radon levels high in Wilkin County?
In 2023, 48.1% of the radon tests reported to CDC for Wilkin County, Minnesota were at or above 4 pCi/L, and the median reported pre-mitigation result was 3.6 pCi/L. Of 86 Minnesota counties with 30 or more tests for the same period, 65 reported a higher share; pooled, the state comes to 44.1%.
Which counties border Wilkin County?
Wilkin County borders 5 counties: Richland County, ND, Grant County, MN, Traverse County, MN, Otter Tail County, MN and Clay County, MN.
Products
Wilkin County, Products
Testing a home in Wilkin County
In Wilkin County, 38.3% of 81 tests reported to CDC over the 2007 to 2016 laboratory totals reached 4 pCi/L, against 44.1% pooled across Minnesota. In Zone 1 the year-round level in Wilkin 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
Wilkin County is in EPA Zone 1, the highest predicted radon potential. Best radon monitors for Zone 1 counties like Wilkin County
Explore
Wilkin County, Bordering counties
Counties bordering Wilkin County
Calculated by Radon411- Radon levels in Grant County, MNEPA zone 1
63.8%at or above 4 pCi/L
Median 5.6 pCi/L · 130 tests · 25.5 points above Wilkin County
- Radon levels in Clay County, MNEPA zone 1
60.6%at or above 4 pCi/L
Median 5.3 pCi/L · 386 tests · 22.3 points above Wilkin County
- Radon levels in Traverse County, MNEPA zone 1
59.7%at or above 4 pCi/L
Median 4.8 pCi/L · 72 tests · 21.4 points above Wilkin County
- Radon levels in Otter Tail County, MNEPA zone 1
56.4%at or above 4 pCi/L
Median 4.6 pCi/L · 546 tests · 18.1 points above Wilkin County
- Radon levels in Richland County, NDEPA zone 1
39.0%at or above 4 pCi/L
Median 3.3 pCi/L · 118 tests · 0.7 points above Wilkin County
Wilkin County, Cities and towns
Cities and towns in Wilkin County
About 6,288 people live in Wilkin County by the Census Bureau's estimate for July 1, 2025, 189 fewer than in 2020 (−2.9%). Spread over its land, that is 8.4 people to the square mile. Breckenridge alone is home to 3,323 of them, 52.8% of the total. Reported testing is thin here: 81 tests over 2007 to 2016, or 12.9 for every 1,000 residents (2025 estimate), where Minnesota as a whole comes to 20.7.
From Breckenridge to Doran, CDC publishes no figure by town: each reads Wilkin County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Breckenridge | 3,323 | −2.8% | 52.8% |
| Rothsayextends beyond Wilkin County | 486 | −2.6% | Counted whole |
| Campbell | 163 | −3.0% | 2.6% |
| Foxhome | 121 | −2.4% | 1.9% |
| Wolverton | 118 | −5.6% | 1.9% |
| Nashua | 64 | −4.5% | 1.0% |
| Kent | 63 | −4.5% | 1.0% |
| Doran | 31 | −3.1% | 0.5% |
8 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 Wilkin County is counted whole, so it has no share.
Wilkin County, Homes
Homes in Wilkin County
Wilkin County is a place of houses on their own lots: 75% of its 2,977 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. Owners live in 80% of the occupied homes (Minnesota: 72%), so for most households a test and a fix are their own to order.
| Homes | Wilkin County | Minnesota |
|---|---|---|
| Housing units | 2,977 | 2,519,538 |
| Detached houses | 75% | 66% |
| In buildings of 5 or more | 14% | 19% |
| Mobile homes | 5% | 3% |
| Built before 1960 | 43% | 29% |
| Built since 2000 | 15% | 22% |
| Middle year built | 1967 | 1978 |
| Owner-occupied | 80% | 72% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.