An official website of the United States government.

Massachusetts Delegation of New Source Performance Standards (NSPS) and National Emissions Standards for Hazardous Air Pollutants (NESHAPs)

The following provides a listing of federal air regulations that have been delegated to Massachusetts. These air regulations establish nation-wide requirements for a wide range of commercial and industrial activities and include New Source Performance Standards established under 40 CFR Part 60 (Part 60 NSPS) and National Emission Standards for Hazardous Air Pollutants established under 40 CFR Part 61 (Part 61 NESHAPs) and under 40 CFR Part 63 (Part 63 NESHAPs).

You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.