Locations and reports
Radon in Knoxville, Tennessee
EPA puts Knox County, where Knoxville 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
17.7% of 203 tests reported to CDC for Knox County (2023) were at or above 4 pCi/L- Your home
- Test to knowNo area figure here is a reading of your home.
The data
Knoxville, What is published
What is published for Knoxville
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 Knoxville, so every radon figure on this page belongs to a county and is labelled with it. Only a test tells you about one home.
Knox County has an EPA zone and its own CDC test figures, shown below. About 202,021 people live in Knoxville.
Knoxville, Counties
The county Knoxville lies in
MeasuredEach 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.
Knox CountyZone 1Highest predicted potential
- 17.7%
- Reported tests at or above 4 pCi/L, 2023
- 1.8 pCi/L
- Median reported result
- 203 tests
- Tests reported to CDC
- 2
- Annual years on file
The median reported pre-mitigation result for 2023 was 1.8 pCi/L in Knox 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.
Radon Action Brief
National Radon Action MonthPre-sale
The radon brief for Knoxville, in one dated file.
- Your area's radon record, explained. EPA's zone and any CDC tests.
- Your plan to test this week. Which test, where it goes, how long.
- Fix costs and pros near you. Costs, EPA's checklist, listed pros.
Save 64%Sale price: $8.99Price after the sale: $25Ends Jan 31Then $25Sale ends January 31, then $25
Local help
Knoxville, Local resources
Local resources for Knoxville
Who to ask in Tennessee: its radon program, test kits and professionals.
- Tennessee Radon ProgramDepartment of Environment & ConservationTennessee’s radon program answers questions about testing, mitigation and the rules where you live.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsThe program says:
The Tennessee Radon Program provides free radon test kits and information assistance to residents, while also providing training opportunities to radon professionals across the state.
- Compare kits
- Professionals in TennesseeRadon testers and mitigators in Tennessee, each with how its listing was checked.
What Tennessee's program says
- Phone
- 1-800-232-1139
- TDEC.Radon@tn.gov
What it means
Knoxville, Questions
Questions about radon in Knoxville
What radon zone is Knoxville in?
EPA's Map of Radon Zones classifies counties, not cities. Knox 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 Knoxville's counties?
For 2023, the share of radon tests reported to CDC that were at or above 4 pCi/L was 17.7% in Knox County (203 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 Knoxville?
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 Knox County, the county Knoxville lies in.
Explore
Knoxville, Next steps
What to do next
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