Radon is a colorless odorless gas that comes from rocks and soil and can accumulate in a home. Prolonged exposure can cause lung cancer. Its estimated that 40% of homes in Minnesota have elevated radon.
There are 2 sources for free radon test kits:
Neighborworks Home Partners
533 Dale Street N
St. Paul, MN 55103
651-292-8710
If elevated radon is detected, the City of Minneapolis has Health and Safety grants to help remediate.