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Radon in Topeka, Kansas

Topeka, Kansas lies in Shawnee County, which EPA places in Zone 2, moderate predicted potential. Radon data is published by county, so this page reads Shawnee County's figures.

KansasAbout 125,795 people

What this means for you

  • Your area: EPA rates Shawnee County, where Topeka is, Zone 2, the middle 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 388 radon tests reported to CDC for Shawnee County (2022), 34.5% 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.

Topeka, What is published

What is published for Topeka

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

Shawnee County has an EPA zone and its own CDC test figures, shown below. About 125,795 people live in Topeka.

Topeka, Counties

The county Topeka lies in

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.

Shawnee CountyZone 2Moderate predicted potential

34.5%
Reported tests at or above 4 pCi/L, 2022
2.6 pCi/L
Median reported result
388 tests
Tests reported to CDC
7
Annual years on file

The median reported pre-mitigation result for 2022 was 2.6 pCi/L in Shawnee 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.

Topeka, Local resources

Local resources for Topeka

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

Topeka, Questions

Questions about radon in Topeka

What radon zone is Topeka in?

EPA's Map of Radon Zones classifies counties, not cities. Shawnee County is in Zone 2 (moderate 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 Topeka's counties?

For 2022, the share of radon tests reported to CDC that were at or above 4 pCi/L was 34.5% in Shawnee County (388 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 Topeka?

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 Shawnee County, the county Topeka lies in.

Topeka, Keep reading

Keep reading

Topeka / Next steps

What to do next