Short-term kit
Air Chek Short-Term radon test kit you hang, lab fee included
- Lab fee included
In home: 72 to 168 hours
Locations and reports
Radon Levels in Isanti County, Minnesota
EPA puts Isanti County in Zone 2, its middle radon zone, and 22.7% of its 66 reported radon tests (2023) were at or above 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
22.7%
11.9 pts below MN
- Isanti
- 22.7%
- Minnesota
- 34.6%
66 tests, 2023
Median result
2.0pCi/L
Below action level
- Isanti
- 2.0 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2023
Tests reported
66
41st of 62 by tests
- Isanti
- 66
- 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
56 of 62
Lowest quarter
- Isanti
- 22.7%
- Renville
- 75.7%
By share, of 62 with 30+ tests
Read a result for Isanti County
Starts at Isanti County's median, 2.0 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 2.0 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. Isanti County's median reported result, 2023.
The data
Isanti County, At a glance
Isanti County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Isanti County is a
USGS geologic potential: High across 98% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Isanti County, 2023
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 20.6% |
| 2015 | 15.2% |
| 2016 | 12.6% |
| 2017 | 13.3% |
| 2018 | 18.4% |
| 2019 | 14.3% |
| 2020 | 14.5% |
| 2021 | 16.5% |
| 2022 | 39.8% |
| 2023 | 22.7% |
2023: 22.7%. Across these years the share ran from 12.6% to 39.8%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
These are the 66 tests reported to CDC for Isanti 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).
Isanti County, Compared
Isanti County radon figures, compared
Calculated by Radon411Isanti County's 66 reported tests in 2023 had a middle value of 2.0 pCi/L and a maximum of 23.0 pCi/L, and 22.7% reached 4 pCi/L. Minnesota as a whole (86 Minnesota counties, pooled) comes to 34.6%: 11.9 points higher than here.
Among its state's counties it ranks 56th of 62 Minnesota counties with 30 or more tests for the same period. Statewide for the same period, Renville County reported the highest share (75.7%) and Lake County the lowest (3.8%).
Below the action level, 29 tests (43.9%) came in under 2 pCi/L, against 36.6% statewide, and 22 tests (33.3%) fell between 2 and 4, against 28.9% statewide. The busiest year on file was 2015, with 217 tests reported; the quietest, 2020, had 55.
EPA's 1993 zone map puts Isanti County in Zone 2, a predicted county average between 2 and 4 pCi/L. USGS geology rates 98% of the county's land high radon potential.
Next door, the shares run from 19.3% in Anoka County to 39.6% in Pine County, with Sherburne County and Anoka County below Isanti County. Over 10 years of annual figures the share rose 2.1 points, from 20.6% in 2014 to 22.7% in 2023; its peak was 39.8% in 2022.
Isanti CountyMinnesota, pooled
22.7% % of tests34.6% % of tests
| Year | Tests | Isanti County, at or above 4 pCi/L | Minnesota, pooled |
|---|---|---|---|
| 2014 | 141 | 20.6% | 42.9% |
| 2015 | 217 | 15.2% | 43.6% |
| 2016 | 119 | 12.6% | 37.0% |
| 2017 | 120 | 13.3% | 38.2% |
| 2018 | 147 | 18.4% | 38.3% |
| 2019 | 63 | 14.3% | 36.1% |
| 2020 | 55 | 14.5% | 31.8% |
| 2021 | 79 | 16.5% | 33.1% |
| 2022 | 83 | 39.8% | 31.6% |
| 2023 | 66 | 22.7% | 34.6% |
Pooled shares: Radon411's sum of CDC's county counts for one period.
Isanti County, State data
Minnesota's own radon test data
MeasuredWhat Minnesota's own agencies publish about radon tests in Isanti 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 Isanti 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
15.7%
173 properties tested with one or more tests at or above 4 pCi/L
Median result
1.9 pCi/L
Average result
2.5 pCi/L
Tests behind these figures
110 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.
Isanti County, Geology
The ground under Isanti County
PredictedMost of the ground under Isanti County is one class on USGS's geologic map: 97.7% of its land is high radon potential, with 2.3% moderate. 97.7% 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 | 97.7% |
| Superior Upland/Central Lowland-Western Lake Section | Glacial deposits derived primarily from volcanic rock. | Moderate | 10 | 2.3% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Isanti County beside the ground around it
Isanti County has more high-potential ground than Minnesota as a whole: 97.7% of its land against 61.1%. Of the 6 counties that border it, 3 have more high-potential ground, Anoka County the most at 100%.
The map rates the ground, not the air in any home.
Local help
Isanti County, Local resources
Radon testing and mitigation in Isanti 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.
Listed radon professionals by town: Braham
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
Isanti County, Questions
Questions about radon in Isanti County
Are radon levels high in Isanti County?
In 2023, 22.7% of the radon tests reported to CDC for Isanti County, Minnesota were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.0 pCi/L. Of 62 Minnesota counties with 30 or more tests for the same period, 55 reported a higher share; pooled, the state comes to 34.6%.
Which counties border Isanti County?
Isanti County borders 6 counties: Kanabec County, Mille Lacs County, Chisago County, Sherburne County, Anoka County and Pine County.
Products
Isanti County, Products
Testing a home in Isanti County
In Isanti County, 22.7% of 66 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 Isanti County; a long-term test tells the year-round average.
Test kits and monitors3
See every kit and monitor
Long-term kit
RL116 long-term radon test kit
- Lab fee extra
Method: Alpha track
In home: 90 days to 12 months
MonitorAranet
Radon One battery digital radon monitor with an e-ink screen
- C-NRPP 2024/25: Not included
- Battery
- Bluetooth
- Alarm
- Screen, app
Method: Ion chamber
First reading: Within 10 minutes
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Isanti County, Bordering counties
Counties bordering Isanti County
Calculated by Radon411- Radon levels in Pine CountyEPA zone 2
39.6%at or above 4 pCi/L
Median 2.5 pCi/L · 48 tests · 16.9 points above Isanti County
- Radon levels in Chisago CountyEPA zone 2
34.9%at or above 4 pCi/L
Median 2.9 pCi/L · 166 tests · 12.2 points above Isanti County
- Radon levels in Mille Lacs CountyEPA zone 2
33.3%at or above 4 pCi/L
Median 2.6 pCi/L · 21 tests · 10.6 points above Isanti County
- Radon levels in Kanabec CountyEPA zone 1
28.0%at or above 4 pCi/L
Median 2.9 pCi/L · 25 tests · 5.3 points above Isanti County
- Radon levels in Sherburne CountyEPA zone 1
21.7%at or above 4 pCi/L
Median 1.8 pCi/L · 351 tests · 1.0 points below Isanti County
- Radon levels in Anoka CountyEPA zone 2
19.3%at or above 4 pCi/L
Median 1.9 pCi/L · 880 tests · 3.4 points below Isanti County
Isanti County, Cities and towns
Cities and towns in Isanti County
Isanti County is growing: the Census Bureau puts it at 44,386 residents on July 1, 2025, up 7.3% from 41,385 in 2020. That works out to 102 people per square mile of land. Its largest town, Cambridge, has 11,090 residents, 25.0% of the total. Reported testing is thin here: 66 tests over 2023, or 1.5 for every 1,000 residents (2025 estimate), where Minnesota as a whole comes to 3.9.
From Cambridge to Braham, CDC publishes no figure by town: each reads Isanti County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Cambridge | 11,090 | +14.7% | 25.0% |
| St. Francisextends beyond Isanti County | 8,635 | +5.7% | Counted whole |
| Isanti | 7,714 | +11.8% | 17.4% |
| Brahamextends beyond Isanti County | 1,789 | −0.4% | Counted whole |
4 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 Isanti County is counted whole, so it has no share.
Isanti County, Homes
Homes in Isanti County
Isanti County is a place of houses on their own lots: 81% of its 16,976 homes are detached single-family houses, against 66% across Minnesota. Much of Isanti County is recent building: 31% of its homes have gone up since 2000 and the middle year built is 1988, against 1978 for Minnesota. 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 | Isanti County | Minnesota |
|---|---|---|
| Housing units | 16,976 | 2,519,538 |
| Detached houses | 81% | 66% |
| In buildings of 5 or more | 9% | 19% |
| Mobile homes | 3% | 3% |
| Built before 1960 | 18% | 29% |
| Built since 2000 | 31% | 22% |
| Middle year built | 1988 | 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.