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	Laws Important Official versions of state statutes and regulations are only available from the Secretary of State. Please read our disclaimer. Federal U.S. Environmental Protection Agency (EPA) Clean Air Act Home Page EPA web site EPA Plain English Guide to the Clean Air Act EPA web site Status Report: MassDEP Implementation of 1990 Federal Clean Air Act Amendments, April 2000 Web page State M.G.L. Chapter 111, Sections 142A-142J: Massachusetts Clean Air Act Massachusetts Legislature web site