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Radon in Columbia, Missouri

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

MissouriAbout 130,851 people

What this means for you

  • Your area: EPA rates Boone County, where Columbia 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 63 radon tests reported to CDC for Boone County (2023), 42.9% 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.

Columbia, What is published

What is published for Columbia

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

Boone County has an EPA zone and its own CDC test figures, shown below. About 130,851 people live in Columbia.

Columbia, Counties

The county Columbia 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.

Boone CountyZone 2Moderate predicted potential

42.9%
Reported tests at or above 4 pCi/L, 2023
3.6 pCi/L
Median reported result
63 tests
Tests reported to CDC
10
Annual years on file

The median reported pre-mitigation result for 2023 was 3.6 pCi/L in Boone 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.

Columbia, Local resources

Local resources for Columbia

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

Missouri Radon Program

Missouri Department of Health and Senior Services

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

Phone
573-751-6102
Email
radon@health.mo.gov
Visit the program's page(opens in a new tab)

Test kits

The program says: Free radon test kits are available for Missouri residents (limit one per household).

Free and low-cost kitsCompare kits

Radon professionals

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

Professionals in Missouri

Columbia, Questions

Questions about radon in Columbia

What radon zone is Columbia in?

EPA's Map of Radon Zones classifies counties, not cities. Boone 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 Columbia's counties?

For 2023, the share of radon tests reported to CDC that were at or above 4 pCi/L was 42.9% in Boone County (63 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 Columbia?

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 Boone County, the county Columbia lies in.

Columbia, Keep reading

Keep reading

Columbia / Next steps

What to do next