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Radon in Cincinnati, Ohio

EPA puts Hamilton County, where Cincinnati is, in Zone 1, its highest radon zone. Homes with elevated levels occur in all three zones, so only a test measures yours.

Data checked By Radon411Methodology

Predicted
Zone 1Highest predicted potential
Measured
34.7%of 3,754 tests reported to CDC for Hamilton County (2008 to 2017, laboratory) were at or above 4 pCi/L
Your home
Test to knowNo area figure here is a reading of your home.

The data

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.

Radon Action Brief

National Radon Action MonthPre-sale

The radon brief for Cincinnati, in one dated file.

  • Your area's radon record, explained.
  • Your plan to test this week.
  • Fix costs and pros near you.

Save 64%Sale price: $8.99Price after the sale: $25Ends Jan 31Then $25

Get the Cincinnati BriefSee a free sample

Area data, not a test of the building.

Local help

Cincinnati, Professionals

Radon professionals listed in Cincinnati

Businesses whose listed city is Cincinnati, from the state registries and listings in the Radon411 directory, with the same business and certification status the directory shows.

Cincinnati, Local resources

Local resources for Cincinnati

Who to ask in Ohio: its radon program, test kits and professionals.

What it means

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.