Radon questions Wisconsin homeowners ask
Short answers, with links to the longer guides where it helps.
What is radon?
A radioactive gas that comes from the natural breakdown of uranium in the ground. It has no color or smell, and it gets into buildings through the foundation.
Why does it matter?
DHS calls radon the second leading cause of lung cancer in the United States and the leading cause among nonsmokers. Smoking in a high-radon home raises the risk sharply.
How many Wisconsin homes have high radon?
About 1 in 10, according to DHS. Levels can vary a lot between houses close together.
Can the DHS radon map tell me if my house is fine?
No. DHS says its interactive map is informational only and can't be used to judge the risk for any single home. Test your own house.
Does Wisconsin require radon testing when a house sells?
No, but DHS highly recommends it. Many buyers include a radon test in their inspection.
Does Wisconsin license radon contractors?
No. DHS recommends professionals certified by NRPP or NRSB.
My house has a radon pipe but no fan. What now?
That's a passive system. Test first. If the level is high, a contractor can usually add a fan to make it active.
Where can I get help locally?
Every county is served by one of 17 regional Radon Information Centers, or call 1-888-LOW-RADON.
- We don't sell tests or install systems
- Every figure links to its source
- Built on Wisconsin DHS and EPA guidance