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National Pollutant Discharge Elimination System (NPDES)

Stormwater Discharges from Industrial Activities-EPA's 2021 MSGP

Remember to throw your gloves in the trash


EPA’s 1990 stormwater regulations established NPDES permit requirements for industrial stormwater discharges, and the Agency issued the first Multi-Sector General Permit (MSGP) for those facilities in 1995. The 2021 MSGP becomes effective on March 1, 2021.

EPA’s 2021 MSGP applies in areas of the country where EPA is the NPDES permitting authority and has made the permit available for coverage. These areas include:

  • Four states:  Massachusetts, New Hampshire, New Mexico, and Idaho
    • On July 1, 2021, NPDES permitting authority for industrial stormwater will transfer to Idaho; for more information about Idaho’s NPDES authorization visit Idaho NPDES Program Authorization
  • The District of Columbia
  • All U.S. territories except for the Virgin Islands
  • Federally operated facilities in Colorado, Delaware, Vermont, and Washington
  • Most Indian country lands, and
  • Other designated activities in specific states (e.g., oil and gas activities in Texas and Oklahoma)

2021 MSGP

On January 15, 2021, EPA issued the 2021 MSGP. Below are pre-publication versions of the permit and associated documents.


2021 MSGP – Permit


2021 MSGP – Appendices


2021 MSGP – Fact Sheet


2021 MSGP – Pre-Publication Federal Register Notice

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