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Radon in Mankato, Minnesota

Mankato, Minnesota spans 3 counties, Blue Earth County, Le Sueur County and Nicollet County. Radon data is published by county, so this page sets their figures side by side.

MinnesotaAbout 46,529 people

What this means for you

  • Your area: Mankato lies in 3 counties. EPA rates Blue Earth County Zone 1, Le Sueur County Zone 1 and Nicollet County Zone 1, where Zone 1 is the highest of its three radon zones. Zones are predictions for whole counties, and homes with elevated levels occur in all three zones.
  • Local tests: For 2023, the share of radon tests reported to CDC that were at or above 4 pCi/L was 32.7% in Blue Earth County (392 tests), 62.2% in Le Sueur County (135 tests) and 45.7% in Nicollet County (129 tests). EPA's action level is 4 pCi/L.
  • Your home: The only way to know your home’s level is to test it.
How to testFind a certified tester

pCi/L (picocuries per liter) is the unit radon is measured in. EPA recommends fixing a home at 4 pCi/L or above, its action level.

Mankato, What is published

What is published for Mankato

Information:

Radon data is published by county, not by city

Radon data is published by county, not by city. EPA assigns radon zones to counties, and CDC publishes radon test figures by county. Neither publishes a figure for Mankato, so every radon figure on this page belongs to a county and is labelled with it. Only a test tells you about one home.

Each county has its own CDC test figures, shown below side by side. About 46,529 people live in Mankato.

Mankato, Counties

Mankato's counties, side by side

Measured

Each county's own EPA zone and its own published CDC figures for 2023, the newest period any of them has. A county without a figure for that period is shown without one, never with a figure from another year.

  • Blue Earth County
    EPA zone
    Zone 1: Highest predicted potential
    At or above 4 pCi/L
    32.7%
    Median result
    2.2 pCi/L
    Tests reported
    392 tests
    Annual years on file
    10
  • Le Sueur County
    EPA zone
    Zone 1: Highest predicted potential
    At or above 4 pCi/L
    62.2%
    Median result
    5.1 pCi/L
    Tests reported
    135 tests
    Annual years on file
    10
  • Nicollet County
    EPA zone
    Zone 1: Highest predicted potential
    At or above 4 pCi/L
    45.7%
    Median result
    3.7 pCi/L
    Tests reported
    129 tests
    Annual years on file
    10
The counties Mankato lies in, each with its own EPA zone and its own published CDC figures for 2023
CountyEPA zoneReported tests at or above 4 pCi/LMedian reported resultTests reportedAnnual years on file
Blue Earth CountyZone 1: Highest predicted potential32.7%2.2 pCi/L392 tests10
Le Sueur CountyZone 1: Highest predicted potential62.2%5.1 pCi/L135 tests10
Nicollet CountyZone 1: Highest predicted potential45.7%3.7 pCi/L129 tests10

The median reported pre-mitigation result for 2023 was 2.2 pCi/L in Blue Earth County, 5.1 pCi/L in Le Sueur County and 3.7 pCi/L in Nicollet County.

CDC counts radon tests that were reported to it, not homes, and figures from few tests can swing widely from year to year. Each county’s report has its full history.

Predicted: EPA Map of Radon Zones, by county. Measured: CDC tracking data, by county, 2023.

Mankato, Local resources

Local resources for Mankato

Who to ask in Minnesota: the state's radon program, test kits and professionals.

MDH Indoor Air Unit

MN Dept. of Health

Minnesota’s radon program answers questions about testing, mitigation and the rules where you live.

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.
Visit the program's page(opens in a new tab)

Test kits

Ask the program whether it has free or discounted kits, or compare kits you can buy.

Free and low-cost kitsCompare kits

Radon professionals

Radon testers and mitigators in Minnesota, each with how its listing was checked.

Professionals in Minnesota

Mankato, Questions

Questions about radon in Mankato

What radon zone is Mankato in?

EPA's Map of Radon Zones classifies counties, not cities. Blue Earth County, Le Sueur County and Nicollet County are in Zone 1 (highest predicted potential). A zone is a prediction for a whole county and never tells you the level in one home.

How many radon tests come back high in Mankato's counties?

For 2023, the share of radon tests reported to CDC that were at or above 4 pCi/L was 32.7% in Blue Earth County (392 tests), 62.2% in Le Sueur County (135 tests) and 45.7% in Nicollet County (129 tests). Each is that county's own figure, counting tests reported to CDC, not homes. Radon411 does not average or combine them into a figure for the city.

Should I test my home in Mankato?

Yes. 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. How to test a home.

The answers use the published figures of Blue Earth County, Le Sueur County and Nicollet County, the counties Mankato lies in.

Mankato, Keep reading

Keep reading

Mankato / Next steps

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