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Radon in Manhattan, Kansas

Manhattan, Kansas spans 2 counties, Pottawatomie County and Riley County. Radon data is published by county, so this page sets their figures side by side.

KansasAbout 54,673 people

What this means for you

  • Your area: Manhattan lies in 2 counties. EPA rates Pottawatomie County Zone 1 and Riley 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 2022, the share of radon tests reported to CDC that were at or above 4 pCi/L was 25.2% in Pottawatomie County (206 tests) and 31.3% in Riley County (800 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.

Manhattan, What is published

What is published for Manhattan

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 Manhattan, 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 54,673 people live in Manhattan.

Manhattan, Counties

Manhattan's counties, side by side

Measured

Each county's own EPA zone and its own published CDC figures for 2022, 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.

  • Pottawatomie County
    EPA zone
    Zone 1: Highest predicted potential
    At or above 4 pCi/L
    25.2%
    Median result
    1.7 pCi/L
    Tests reported
    206 tests
    Annual years on file
    7
  • Riley County
    EPA zone
    Zone 1: Highest predicted potential
    At or above 4 pCi/L
    31.3%
    Median result
    1.9 pCi/L
    Tests reported
    800 tests
    Annual years on file
    7
The counties Manhattan lies in, each with its own EPA zone and its own published CDC figures for 2022
CountyEPA zoneReported tests at or above 4 pCi/LMedian reported resultTests reportedAnnual years on file
Pottawatomie CountyZone 1: Highest predicted potential25.2%1.7 pCi/L206 tests7
Riley CountyZone 1: Highest predicted potential31.3%1.9 pCi/L800 tests7

The median reported pre-mitigation result for 2022 was 1.7 pCi/L in Pottawatomie County and 1.9 pCi/L in Riley 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, 2022.

Manhattan, Local resources

Local resources for Manhattan

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

Kansas Radon Program

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

Phone
(800) 693-5343
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 Kansas, each with how its listing was checked.

Professionals in Kansas

Manhattan, Questions

Questions about radon in Manhattan

What radon zone is Manhattan in?

EPA's Map of Radon Zones classifies counties, not cities. Pottawatomie County and Riley 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 Manhattan's counties?

For 2022, the share of radon tests reported to CDC that were at or above 4 pCi/L was 25.2% in Pottawatomie County (206 tests) and 31.3% in Riley County (800 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 Manhattan?

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 Pottawatomie County and Riley County, the counties Manhattan lies in.

Manhattan, Keep reading

Keep reading

Manhattan / Next steps

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