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Radon Information for WisconsinEstimated Percent of Homes with greater than 4 picocuries per liter Radon.  Click for larger picture.

Radon is a naturally occurring, odorless radioactive gas that causes lung cancer. Between five and ten percent of the homes in Wisconsin have radon levels above the US EPA guideline of 4 pCi/L for the year average on the main floor. Every region of Wisconsin has some homes with elevated radon levels.

The only way to know the radon level in a house is to measure it. You can get Radon test kits in hardware stores or from local health agencies (see information centers, below) for around $20.  Radon can be controlled in any house.

Contact Information

The State of Wisconsin supports a variety of radon activities, including research, education and a statewide network of Radon Information Centers (RIC). 

  • The RICs can provide information, test kits, and consultations to the public regarding radioactive radon gas. 

  • Wisconsin also supports a hotline that can direct you to your local RIC or a radon expert at 1-888 LOW RADON (1-888-569-7236).

Regional Radon Information Center Map - Click on your county for contact information.


Last Revised:  August 11, 2014