Certified Radon Mitigators
in Chicago, Illinois

Chicago and Cook County sit on glacial lake sediments and till over Paleozoic dolomite and shale — geology that produces elevated radon across the entire metro area despite the urban setting. Illinois averages 5.1 pCi/L statewide, and Chicago-area homes — from Evanston and Oak Park to Naperville and the south suburbs — consistently test above the EPA action level. Chicago's dense housing stock includes everything from brick two-flats to ranch homes with full basements, and the metro's large certified contractor market keeps prices competitive. Illinois requires IEMA-accredited contractor certification.