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Radon in Louisville, Kentucky

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

Kentucky

What this means for you

  • Your area: EPA rates Jefferson County, where Louisville 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 6,590 radon tests reported to CDC for Jefferson County (2008 to 2017, laboratory), 39.4% 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.

Louisville, What is published

What is published for Louisville

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

Jefferson County has an EPA zone and its own CDC test figures, shown below.

Louisville, Counties

The county Louisville 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.

Jefferson CountyZone 1Highest predicted potential

39.4%
Reported tests at or above 4 pCi/L, 2008 to 2017, laboratory
2.7 pCi/L
Median reported result
6,590 tests
Tests reported to CDC
0
Annual years on file

The median reported pre-mitigation result for 2008 to 2017, laboratory was 2.7 pCi/L in Jefferson 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.

Louisville, Professionals

Radon professionals listed in Louisville

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

12 listings with Louisville as the city. See every listing in Louisville, or all radon professionals in Kentucky.

Louisville, Local resources

Local resources for Louisville

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

Kentucky's radon program

Kentucky Board of Radon Safety

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

Phone
502-782-2782
Email
Radon@ky.gov
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

12 listings cover Louisville.

Professionals in Kentucky

Louisville, Questions

Questions about radon in Louisville

What radon zone is Louisville in?

EPA's Map of Radon Zones classifies counties, not cities. Jefferson 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 Louisville's counties?

For 2008 to 2017, laboratory, the share of radon tests reported to CDC that were at or above 4 pCi/L was 39.4% in Jefferson County (6,590 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 Louisville?

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 Jefferson County, the county Louisville lies in.

Louisville, Keep reading

Keep reading

Louisville / Next steps

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