Do Illinois Homes Need Radon Mitigation Systems?

Radon is an odorless, invisible radioactive gas that forms naturally in soil and can enter homes through cracks in basements, crawl spaces, and foundation walls. Because you can’t detect it by smell or sight, the only reliable way to know your indoor risk is to test.

Illinois has regions where radon levels can be high, so the question for many homeowners is not whether radon exists, but whether their specific home has elevated concentrations that warrant action. Public health guidance generally emphasizes testing first, then installing mitigation only when results justify it.