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Minnesota Radon Map and Levels by County

Minnesota's counties span EPA Zones 1 and 2. Homes with elevated levels occur in all three zones, so only a test measures yours.

Data checked By Radon411Methodology

Predicted
68 of 87counties in Zone 1, EPA's highest radon zone
Measured
By countyCDC publishes Minnesota's test figures by county: 87 of 87 counties have one.
Your home
Test to knowNo area figure here is a reading of your home.
How to test this homeFind a certified tester

The data

Minnesota, At a glance

Minnesota at a glance

Predicted: EPA radon zone

87 of 87 counties classified

EPA classifies counties, not states. Of the 87 counties in Minnesota with a zone, 68 are in Zone 1 and 19 in Zone 2.

  • Zone 1: Highest predicted potentialgreater than 4 pCi/L68 of 87 counties · 78.2%
  • Zone 2: Moderate predicted potential2 to 4 pCi/L19 of 87 counties · 21.8%

An EPA radon zone describes predicted potential across a whole county. It is not intended to determine whether any individual home should be tested, and homes with elevated levels occur in all three zones. EPA recommends testing every home regardless of zone, and testing is the only way to know the radon level in a specific building.

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

CDC test figures, county by county

CDC publishes Minnesota's radon test figures by county: 87 of its 87 counties have one. Each one's share is in the county list.

Minnesota, State data

Minnesota's own radon test data

Measured

What Minnesota's own agencies publish about radon tests, with their publisher and 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 Minnesota

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

36.2%

94,719 properties tested with one or more tests at or above 4 pCi/L

Median result

2.8 pCi/L

Average result

3.8 pCi/L

Tests behind these figures

26,137 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.

Minnesota, Counties

Minnesota counties by EPA zone

Predicted

Minnesota's radon map, then all 87 counties by the zone EPA predicts for each, highest reported share of tests at or above 4 pCi/L first. Each has its own report.

Minnesota radon map by county: EPA radon zones. Map of Minnesota's 87 counties shaded by EPA radon zone: Zone 1 in red-orange, Zone 2 in amber. 68 in Zone 1, 19 in Zone 2, 0 in Zone 3.
Minnesota radon map by countyEPA radon zones for Minnesota's counties: 68 counties in Zone 1, 19 counties in Zone 2, 0 counties in Zone 3.Predicted potential for each county, not a reading of any home. Homes with elevated levels of radon have been found in all three zones.

Zone 1: highest predicted potential68

Local help

Minnesota, Local resources

Local resources in Minnesota

Who to ask in Minnesota: its radon program, test kits and professionals.

What Minnesota's program says
Phone
651-201-4601
Email
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.

Radon Action Brief

National Radon Action MonthPre-sale

The radon brief for your Minnesota county, in one dated file.

  • Your area's radon record, explained.
  • Your plan to test this week.
  • Fix costs and pros near you.

Save 64%Sale price: $8.99Price after the sale: $25Ends Jan 31Then $25

Get your Minnesota county's BriefSee a free sample

Area data, not a test of the building.

What it means

Minnesota, Questions

Questions about radon in Minnesota

Common questions

9 questions, answered from the figures above

Is radon a problem in Minnesota?

EPA's Map of Radon Zones places 68 of the 87 Minnesota counties it classifies in Zone 1, the highest predicted potential, 19 in Zone 2 and 0 in Zone 3. An EPA radon zone describes predicted potential across a whole county. It is not intended to determine whether any individual home should be tested, and homes with elevated levels occur in all three zones. EPA recommends testing every home regardless of zone, and testing is the only way to know the radon level in a specific building.

Minnesota on the radon mapRadon levels by state

Who does radon mitigation in Minnesota?

Radon411's Minnesota directory lists 253 radon businesses for testing, mitigation or both, each with the licensing list it was read from. EPA recommends having a qualified contractor fix a home with a radon problem, because lowering high radon levels takes technical knowledge and special skills, and some states require the work to be done by a licensed or certified professional.

How radon mitigation worksWhat mitigation costsRadon professionals in Minnesota

How do I get a radon test in Minnesota?

EPA says you can test your home yourself or hire a qualified radon test company, and that either approach takes only a small amount of time and effort. The Minnesota radon program is the place to ask about certified testers and any test kit offer it runs.

How to test a homeFree and low-cost kits by stateMinnesota radon program

Which Minnesota counties are in EPA radon Zone 1?

68 counties are in Zone 1: Becker County, Big Stone County, Blue Earth County, Brown County, Carver County, Chippewa County, Clay County, Cottonwood County, and 60 more in the county table on this page. Zone 1 is EPA's class for highest predicted potential, a predicted average indoor screening level greater than 4 pCi/L. A zone is a prediction for a county, not a measurement of any home.

Radon in Becker CountyRadon in Big Stone CountyRadon in Blue Earth County

Which Minnesota counties have the highest radon?

87 of Minnesota's 87 counties have an EPA radon zone published here. Radon411 will not rank counties on data it does not hold, and a zone is a prediction for an area rather than a measurement of any building.

What share of radon tests in Minnesota are high?

CDC has published no statewide radon testing statistics for Minnesota, so we cannot give a figure. Where CDC does publish one, the percentage describes radon tests reported to CDC, not homes.

Which EPA region is Minnesota in?

Minnesota is in EPA Region 5: Great Lakes.

Do I need to test my home in Minnesota?

Yes, wherever you live in the state. Testing is the only way to know the radon level in a specific building. EPA recommends fixing a home when the radon level is 4 pCi/L or higher. EPA recommends considering a fix when the level is between 2 and 4 pCi/L.

Why does this page show coverage rather than one radon level for Minnesota?

A statewide figure averages counties with very different geology and very different numbers of reported tests, so it hides more than it shows. The county report is the level at which the EPA zone, the geologic potential and the reported testing statistics are actually published, which is why the county table above links to every one of them.

If you own, buy, sell or rent

What these figures mean for each reader, with the guide that covers it

The zone counts on this page describe counties across Minnesota. They are predictions for areas, and none of them measures your building.

Minnesota in figures

The figures above, said in words

What the published data says about Minnesota, in words. A zone and a share of tests describe an area, never the level in any one home.

    • Predicted

      Predicted

      EPA places 68 of Minnesota's 87 counties in Zone 1 and 19 in Zone 2.

      Zone 1 counties, A to Z, begin with Becker County, Big Stone County and Blue Earth County; the county section below lists all 68.

    • Compared

      Calculated by Radon411

      78% of Minnesota's counties with a zone on file are in Zone 1, a larger share than across all U.S. counties (34%). It is a share of counties, not of land, people or homes.

  • Reported tests

    Measured

    CDC has no statewide testing figure for Minnesota on file here.

    87 of the 87 counties have a published county figure; the most tests in each one's latest year were reported for Hennepin County (6,545 tests in 2023), Ramsey County (2,213 tests in 2023) and Dakota County (2,183 tests in 2023).

  • Local record

    Minnesota's radon program is the MDH Indoor Air Unit, run by MN Dept. of Health; its contacts are under Local resources.

    6 cities have a page setting the figures of the counties it lies in side by side: St. Paul, Plymouth, St. Cloud, Duluth, Mankato and Eagan.

Products

Minnesota, Products

Testing and mitigation products

Whatever the figures for Minnesota show, only a test tells you about one home.

Test kits and monitors42

See all products

As an Amazon Associate, Radon411 earns from qualifying purchases.

Best radon monitors for Minnesota homes, compared

Testing

5

Mitigation

3

Explore

Cities in Minnesota with their own page

Radon data is published by county, not by city. Each city page sets the figures of the counties the city lies in side by side.

Minnesota, Next steps

What to do next

  1. LearnKnow what radon isWhat radon is, how it gets indoors, and why a county zone is not a reading for your home.Learn about radon
  2. TestTest the building you live inShort-term or long-term, where the device goes, and closed-house conditions.How to test
  3. FixBring a high level downHow a mitigation system works, and the retest that confirms it.How mitigation works
  4. Find a proHire a certified professionalMeasurement and mitigation professionals by state, with their certifications.Find a professional

Informational. Follow EPA guidance. EPA says all radon tests should be taken for a minimum of 48 hours, with windows and doors closed from 12 hours before a short-term test.