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County radon report

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Locations and reports

Radon in Cincinnati, Ohio

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

OhioAbout 314,367 people

What this means for you

  • Your area: EPA rates Hamilton County, where Cincinnati 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 3,754 radon tests reported to CDC for Hamilton County (2008 to 2017, laboratory), 34.7% 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.

Cincinnati, What is published

What is published for Cincinnati

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

Hamilton County has an EPA zone and its own CDC test figures, shown below. About 314,367 people live in Cincinnati.

Cincinnati, Counties

The county Cincinnati lies in

Measured

Each county's own EPA zone and its own published CDC figures for 2008 to 2017, laboratory, 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.

Hamilton CountyZone 1Highest predicted potential

34.7%
Reported tests at or above 4 pCi/L, 2008 to 2017, laboratory
2.8 pCi/L
Median reported result
3,754 tests
Tests reported to CDC
0
Annual years on file

The median reported pre-mitigation result for 2008 to 2017, laboratory was 2.8 pCi/L in Hamilton 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, 2008 to 2017, laboratory.

Cincinnati, Local resources

Local resources for Cincinnati

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

Radon Education and Licensing Program

Ohio Department of Health

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

Phone
614-728-0272
Email
indoor.radon@odh.ohio.gov
Licensing of radon professionals
This program licenses companies and persons directly involved with the radon testing and mitigation industry.
Visit the program's page(opens in a new tab)

Test kits

The program says: Free radon test kits are available for Ohio homeowners.

Free and low-cost kitsCompare kits

Radon professionals

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

Professionals in Ohio

Cincinnati, Questions

Questions about radon in Cincinnati

What radon zone is Cincinnati in?

EPA's Map of Radon Zones classifies counties, not cities. Hamilton 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 Cincinnati's counties?

For 2008 to 2017, laboratory, the share of radon tests reported to CDC that were at or above 4 pCi/L was 34.7% in Hamilton County (3,754 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 Cincinnati?

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 Hamilton County, the county Cincinnati lies in.

Cincinnati, Keep reading

Keep reading

Cincinnati / Next steps

What to do next