It’s National Radon Action Month. You can’t see or smell radon, but it can build up inside homes, buildings, and schools to dangerous levels. Exposure to high levels of radon can cause lung cancer. Radon forms naturally. Uranium in soil or rock breaks down to form radium, which then turns into radon gas. Once formed, radon enters a building through cracks in walls, basement floors, foundations and other openings. As radon decays, it releases radioactive byproducts that are inhaled and can cause cancer. Because radon comes from rock and soil, it can be found anywhere. Contact Grundy County’s environmental health specialist to learn more about how you can test your home for radon. Call Phone: 319-824-1212 or visit www.grundycountyiowa.gov/departments/environmental-health