Locations and reports
Radon in Madison, Wisconsin
EPA puts Dane County, where Madison 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
34.9% of 2,887 tests reported to CDC for Dane 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
Madison, What is published
What is published for Madison
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 Madison, so every radon figure on this page belongs to a county and is labelled with it. Only a test tells you about one home.
Dane County has an EPA zone and its own CDC test figures, shown below. About 286,233 people live in Madison.
Madison, Counties
The county Madison 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.
Dane CountyZone 1Highest predicted potential
- 34.9%
- Reported tests at or above 4 pCi/L, 2023
- 2.5 pCi/L
- Median reported result
- 2,887 tests
- Tests reported to CDC
- 9
- Annual years on file
The median reported pre-mitigation result for 2023 was 2.5 pCi/L in Dane 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 Madison, 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
Madison, Local resources
Local resources for Madison
Who to ask in Wisconsin: its radon program, test kits and professionals.
- Wisconsin's radon programWisconsin Department of Health ServicesWisconsin’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:
We recommend starting with your regional Radon Information Center since many centers provide test kits for free or reduced cost, and often with laboratory fees covered.
- Compare kits
- Professionals in WisconsinRadon testers and mitigators in Wisconsin, each with how its listing was checked.
What Wisconsin's program says
- Phone
- 1-888-569-7236
- DHSRadon@dhs.wisconsin.gov
- Licensing of radon professionals
The State of Wisconsin does not require contractors performing radon measurement or mitigation work to be state licensed or nationally certified.
What it means
Madison, Questions
Questions about radon in Madison
What radon zone is Madison in?
EPA's Map of Radon Zones classifies counties, not cities. Dane 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 Madison's counties?
For 2023, the share of radon tests reported to CDC that were at or above 4 pCi/L was 34.9% in Dane County (2,887 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 Madison?
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 Dane County, the county Madison lies in.
Explore
Madison, Next steps
What to do next
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