Overview

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 Parts 1-7 (PDF)(70 pp, 905 K)
• 2021 MSGP - Permit Part 8 - Sector Specific Requirements (PDF)(138 pp, 10 MB)
• 2021 MSGP - Permit Part 9 - CWA 401 Conditions (PDF)(40 pp, 552 K)
• 2021 MSGP - Appendix A - Definitions (PDF)(11 pp, 171 K)
• 2021 MSGP - Appendix B - Standard Permit Conditions (PDF)(8 pp, 341 K)
• 2021 MSGP - Appendix C - Areas Eligible for Coverage (PDF)(5 pp, 139 K)
• 2021 MSGP - Appendix D - Facilities and Activities Covered (PDF)(6 pp, 174 K)
• 2021 MSGP - Appendix E - Procedures Relating to Endangered Species Protection (PDF)(23 pp, 470 K)
• 2021 MSGP - Appendix F - Procedures Relating to Historic Properties Preservation (PDF)(5 pp, 146 K)
• 2021 MSGP - Appendix G - Notice of Intent (NOI) (PDF)(11 pp, 764 K)
• 2021 MSGP - Appendix H - Notice of Termination (NOT) Form (PDF)(5 pp, 232 K)
• 2021 MSGP - Appendix I - Annual Report Form (PDF)(5 pp, 230 K)
• 2021 MSGP - Appendix J - Calculating Hardness (PDF)(2 pp, 81 K)
• 2021 MSGP - Appendix K - No Exposure Certification (NEC) Form (PDF)(6 pp, 427 K)
• 2021 MSGP - Appendix L - List of Tier 3 Tier 2 and Tier 2.5 Waters (PDF)(7 pp, 132 K)
• 2021 MSGP - Appendix M - Discharge Monitoring Report (DMR) Form (PDF)(7 pp, 370 K)
• 2021 MSGP - Appendix N - List of SIC and NAICS Codes (PDF)(67 pp, 2 MB)
• 2021 MSGP - Appendix O - Summary of Reports Permit Submittals (PDF)(6 pp, 84 K)
• 2021 MSGP - Appendix P - List of Federal CERCLA Sites (PDF)(2 pp, 30 K)
• 2021 MSGP - Fact Sheet (PDF)(135 pp, 2 MB)
• 2021 MSGP - Pre-Publication Federal Register Notice (PDF)(42 pp, 352 K)