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Radon in Asheville, North Carolina

Asheville, North Carolina lies in Buncombe County, which EPA places in Zone 1, highest predicted potential. Radon data is published by county, so this page reads Buncombe County's figures.

North CarolinaAbout 93,523 people

What this means for you

  • Your area: EPA rates Buncombe County, where Asheville 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 50 radon tests reported to CDC for Buncombe County (2022), 38.0% 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.

Asheville, What is published

What is published for Asheville

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

Buncombe County has an EPA zone and its own CDC test figures, shown below. About 93,523 people live in Asheville.

Asheville, Counties

The county Asheville 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.

Buncombe CountyZone 1Highest predicted potential

38.0%
Reported tests at or above 4 pCi/L, 2022
2.5 pCi/L
Median reported result
50 tests
Tests reported to CDC
4
Annual years on file

The median reported pre-mitigation result for 2022 was 2.5 pCi/L in Buncombe 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.

Asheville, Local resources

Local resources for Asheville

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

North Carolina Radon Program

NCDHHS

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

Licensing of radon professionals
The North Carolina Radon Program is presently developing a Radon Proficiency Program as directed by Session Law 2023-91 House Bill 782 .
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 North Carolina, each with how its listing was checked.

Professionals in North Carolina

Asheville, Questions

Questions about radon in Asheville

What radon zone is Asheville in?

EPA's Map of Radon Zones classifies counties, not cities. Buncombe 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 Asheville's counties?

For 2022, the share of radon tests reported to CDC that were at or above 4 pCi/L was 38.0% in Buncombe County (50 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 Asheville?

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 Buncombe County, the county Asheville lies in.

Asheville, Keep reading

Keep reading

Asheville / Next steps

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