Short-term kit
PicoCan short-term charcoal canister radon test
- Lab fee included
Method: Charcoal
In home: 48 to 96 hours
Locations and reports
Radon Levels in Lake County, Minnesota
EPA puts Lake County in Zone 2, its middle radon zone, and most reported tests there come back low, though 3.8% of 78 (2023) reached 4 pCi/L. Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Share at 4+ pCi/L
3.8%
30.8 pts below MN
- Lake
- 3.8%
- Minnesota
- 34.6%
78 tests, 2023
Median result
1.3pCi/L
Below action level
- Lake
- 1.3 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2023
Tests reported
78
39th of 62 by tests
- Lake
- 78
- Hennepin
- 6,545
Reported to CDC before any fix, 2023
EPA radon zone
Zone 2
Moderate potential
- 1
- Zone 2
- 3
1 highest, 3 lowest
EPA predicts 2 to 4 pCi/L indoors
Rank in Minnesota
62 of 62
Lowest quarter
- Lake
- 3.8%
- Renville
- 75.7%
By share, of 62 with 30+ tests
Read a result for Lake County
Starts at Lake County's median, 1.3 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 1.3 pCi/L
Below 2 pCi/L
- Under 20 to 1.9 pCi/L
- 2 to 4consider a fix
- 4 and aboveEPA says fix it
This result is below 2 pCi/L, the level at which EPA says a fix should be considered. Lake County's median reported result, 2023.
The data
Lake County, At a glance
Lake County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Lake 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 Lake County, 2023
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 4.3% |
| 2015 | 28.3% |
| 2016 | 23.8% |
| 2017 | 18.6% |
| 2018 | 16.9% |
| 2019 | 27.6% |
| 2020 | 37.9% |
| 2021 | 27.9% |
| 2022 | 26.1% |
| 2023 | 3.8% |
2023: 3.8%. Across these years the share ran from 3.8% to 37.9%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
These are the 78 tests reported to CDC for Lake County over 2023, many from homes being sold or already suspected of a problem: they describe the county's reported tests, not this house.
Measured: CDC tracking data. Figure above: 2023. Measured data period: 2005 to 2023 (every CDC figure on file).
Lake County, Compared
Lake County radon figures, compared
Calculated by Radon411Only 3 of 78 radon tests reported for Lake County in 2023 reached 4 pCi/L (3.8%). The median result, 1.3 pCi/L, sits below 2, well under EPA's 4 pCi/L action level, and the top reported result was 8.1 pCi/L.
Across 86 Minnesota counties pooled together, 34.6% of tests reached that level, so Lake County runs 30.8 points below its state. Against the national pool of 33.4%, the gap is 29.6 points lower. Its place in the state: 62nd of 62 Minnesota counties with 30 or more tests for the same period.
The reported tests do not follow EPA's Zone 2 label for Lake County (predicted average between 2 and 4 pCi/L): 3.8% of them reached 4 pCi/L, fewer than that label suggests. Of 2 neighbours with a figure, all 2 reported a larger share at or above 4 pCi/L; the spread is 12.5% (Cook County) to 20.2% (St. Louis County).
Below the action level, 57 tests (73.1%) came in under 2 pCi/L, against 36.6% statewide, and 18 tests (23.1%) fell between 2 and 4, against 28.9% statewide. Over 7 years of annual figures the share held within 2 points, from 4.3% in 2014 to 3.8% in 2023; its peak was 28.3% in 2015. USGS geology rates 100% of the county's land moderate radon potential.
The busiest year on file was 2023, with 78 tests reported; the quietest, 2022, had 23.
Lake CountyMinnesota, pooled
3.8% % of tests34.6% % of tests
| Year | Tests | Lake County, at or above 4 pCi/L | Minnesota, pooled |
|---|---|---|---|
| 2014 | 46 | 4.3% | 42.9% |
| 2015 | 60 | 28.3% | 43.6% |
| 2016 | 63 | 23.8% | 37.0% |
| 2017 | 70 | 18.6% | 38.2% |
| 2018 | 77 | 16.9% | 38.3% |
| 2021 | 43 | 27.9% | 33.1% |
| 2023 | 78 | 3.8% | 34.6% |
Pooled shares: Radon411's sum of CDC's county counts for one period.
Lake County, State data
Minnesota's own radon test data
MeasuredWhat Minnesota's own agencies publish about radon tests in Lake 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 Lake 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
25.6%
84 properties tested with one or more tests at or above 4 pCi/L
Median result
1.9 pCi/L
Average result
2.8 pCi/L
Tests behind these figures
33 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.
Lake County, Geology
The ground under Lake County
PredictedUSGS's geologic map puts all of Lake County's mapped land in one class: moderate radon potential. All of it lies in the area the map calls Superior Upland/Central Lowland-Western Lake Section, to which USGS gives a radon index of 10, in the moderate band (9 to 11).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Superior Upland/Central Lowland-Western Lake Section | Glacial deposits derived primarily from volcanic rock. | Moderate | 10 | 99.9% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Lake County beside the ground around it
Across Minnesota 61.1% of the land is rated high; none of Lake County's is. Of the 2 counties that border it, none has as large a share of moderate-potential ground; St. Louis County comes nearest at 99.9%.
The map rates the ground, not the air in any home.
Local help
Lake County, Local resources
Radon testing and mitigation in Lake 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
Lake County, Questions
Questions about radon in Lake County
Are radon levels high in Lake County?
In 2023, 3.8% of the radon tests reported to CDC for Lake County, Minnesota were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.3 pCi/L. Of 62 Minnesota counties with 30 or more tests for the same period, 61 reported a higher share; pooled, the state comes to 34.6%.
Which counties border Lake County?
Lake County borders 2 counties: Cook County and St. Louis County.
Products
Lake County, Products
Testing a home in Lake County
In Lake County, 3.8% of 78 tests reported to CDC in 2023 reached 4 pCi/L, against 34.6% pooled across Minnesota. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Lake 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
RM-65 rechargeable radon detector with a color screen and alarm
- C-NRPP 2024/25: Not included
- Battery
- Alarm
- Screen
Method: Semiconductor sensor
First reading: Within 6 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Lake County, Bordering counties
Counties bordering Lake County
Calculated by Radon411- Radon levels in St. Louis CountyEPA zone 2
20.2%at or above 4 pCi/L
Median 1.7 pCi/L · 496 tests · 16.4 points above Lake County
- Radon levels in Cook CountyEPA zone 2
12.5%at or above 4 pCi/L
Median 1.8 pCi/L · 32 tests · 8.7 points above Lake County
Lake County, Cities and towns
Cities and towns in Lake County
About 10,746 people live in Lake County by the Census Bureau's estimate for July 1, 2025, 177 fewer than in 2020 (−1.6%). Spread over its land, that is 5.1 people to the square mile. Its largest town, Two Harbors, has 3,443 residents, 32.0% of the total. Together its 3 incorporated places hold 49.6% of those residents; the other 50.4% live outside any of them. Testing is reported here more often than across the state: CDC's 78 reported tests for 2023 come to 7.3 for every 1,000 residents (2025 estimate), against 3.9 for Minnesota.
From Two Harbors to Beaver Bay, CDC publishes no figure by town: each reads Lake County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Two Harbors | 3,443 | −5.2% | 32.0% |
| Silver Bay | 1,767 | −4.9% | 16.4% |
| Beaver Bay | 124 | +1.6% | 1.2% |
3 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).
Lake County, Homes
Homes in Lake County
Lake County is a place of houses on their own lots: 87% of its 7,405 homes are detached single-family houses, against 66% across Minnesota. The homes are older than Minnesota's as a whole: half were built before 1970 (1978 for Minnesota), and 41% date from before 1960. Owners live in 84% of the occupied homes (Minnesota: 72%), so for most households a test and a fix are their own to order.
| Homes | Lake County | Minnesota |
|---|---|---|
| Housing units | 7,405 | 2,519,538 |
| Detached houses | 87% | 66% |
| In buildings of 5 or more | 6% | 19% |
| Mobile homes | 3% | 3% |
| Built before 1960 | 41% | 29% |
| Built since 2000 | 17% | 22% |
| Middle year built | 1970 | 1978 |
| Owner-occupied | 84% | 72% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.