Certified Radon Mitigators
in Baltimore, Maryland

Baltimore City and Baltimore County sit on the fall line between the Piedmont's crystalline rock and the Coastal Plain's sedimentary deposits, with radon risk that is meaningfully higher in the Piedmont portions of the metro. Baltimore County's northern and western suburbs — Towson, Timonium, Reisterstown, and Catonsville — sit on granite and gneiss bedrock and are EPA Zone 1, with average indoor readings well above the action level. The city proper and its eastern suburbs sit on Coastal Plain sediments and run lower, but aren't radon-free. Maryland requires state licensure for radon contractors and maintains a public database of licensed mitigators. Baltimore's large contractor market keeps pricing competitive.