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Locations and reports

Radon in Plymouth, Minnesota

Plymouth, Minnesota lies in Hennepin County, which EPA places in Zone 1, highest predicted potential. Radon data is published by county, so this page reads Hennepin County's figures.

MinnesotaAbout 78,942 people

What this means for you

  • Your area: EPA rates Hennepin County, where Plymouth is, Zone 1, the highest of its three radon zones. That is a prediction for the whole county, and homes with elevated levels occur in all three zones.
  • Local tests: Of 6,545 radon tests reported to CDC for Hennepin County (2023), 32.0% were at or above 4 pCi/L, EPA's action level.
  • 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.

Plymouth, What is published

What is published for Plymouth

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 Plymouth, so every radon figure on this page belongs to a county and is labelled with it. Only a test tells you about one home.

Hennepin County has an EPA zone and its own CDC test figures, shown below. About 78,942 people live in Plymouth.

Plymouth, Counties

The county Plymouth lies in

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.

Hennepin CountyZone 1Highest predicted potential

32.0%
Reported tests at or above 4 pCi/L, 2023
2.7 pCi/L
Median reported result
6,545 tests
Tests reported to CDC
10
Annual years on file

The median reported pre-mitigation result for 2023 was 2.7 pCi/L in Hennepin 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.

Plymouth, Local resources

Local resources for Plymouth

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

Plymouth, Questions

Questions about radon in Plymouth

What radon zone is Plymouth in?

EPA's Map of Radon Zones classifies counties, not cities. Hennepin County is 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 Plymouth's counties?

For 2023, the share of radon tests reported to CDC that were at or above 4 pCi/L was 32.0% in Hennepin County (6,545 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 Plymouth?

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 Hennepin County, the county Plymouth lies in.

Plymouth, Keep reading

Keep reading

Plymouth / Next steps

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