Stormwater Discharges from Industrial Activities-EPA's Proposed 2026 MSGP

• Proposed 2026 Multi-Sector General Permit for Public Comment
• Proposed 2026 MSGP Documents

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Proposed 2026 Multi-Sector General Permit for Public Comment

EPA is seeking public comment on a proposed 2026 National Pollutant Discharge Elimination System (NPDES) Multi-Sector General Permit (MSGP) for stormwater discharges from industrial activity. This proposed permit would replace the 2021 MSGP upon finalization. This proposed permit would cover stormwater discharges from industrial facilities in areas where EPA is the NPDES permitting authority.

The proposed permit is open for public comment through May 19, 2025. Comments must be received on or before May 19, 2025.

Comments must be submitted on www.regulations.gov for docket ID EPA-HQ-OW-2024-0481.

The fact sheet, permit, and other associated documents can be found below and are available in the docket (docket ID EPA-HQ-OW-2024-0481).

• Federal Register Notice (pdf) (219.98 KB)

In January 2025, EPA held a webinar to provide an overview of new proposed permit requirements.

• Proposed 2026 MSGP for Industrial Stormwater Discharges - Presentation Slides (pdf) (1.01 MB)

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Proposed 2026 MSGP Documents

• Proposed 2026 MSGP – Fact Sheet (pdf) (2.94 MB)

Proposed 2026 MSGP – Permit

• Proposed 2026 MSGP - Permit Parts 1-7 (pdf) (1.1 MB)
• Proposed 2026 MSGP – Permit Part 8 – Sector Specific Requirements (pdf) (2.16 MB)
• Proposed 2026 MSGP – Permit Part 9 CWA 401 Conditions (pdf) (102.63 KB)

2026 MSGP – Appendices

• Proposed 2026 MSGP - Appendix A - Definitions (pdf) (276.01 KB)
• Proposed 2026 MSGP - Appendix B - Standard Permit Conditions (pdf) (222.36 KB)
• Proposed 2026 MSGP - Appendix C - Areas Eligible for Coverage (pdf) (149.57 KB)
• Proposed 2026 MSGP - Appendix D - Facilities and Activities Covered (pdf) (218.84 KB)
• Proposed 2026 MSGP - Appendix E - Procedures Relating to Endangered Species Protection (pdf) (540.72 KB)
• Proposed 2026 MSGP - Appendix F - Procedures Relating to Historic Properties Preservation (pdf) (177.7 KB)
• Proposed 2026 MSGP - Appendix G - Notice of Intent (NOI) (pdf) (4.01 MB)
• Proposed 2026 MSGP - Appendix H - Notice of Termination (NOT) Form (pdf) (1.74 MB)
• Proposed 2026 MSGP - Appendix I - Annual Report Form (pdf) (1.93 MB)
• Proposed 2026 MSGP - Appendix J - Calculating Hardness (pdf) (106.55 KB)
• Proposed 2026 MSGP - Appendix K - No Exposure Certification (NEC) Form (pdf) (2.5 MB)
• Proposed 2026 MSGP - Appendix L - List of Federal CERCLA Sites (pdf) (133.26 KB)
• Proposed 2026 MSGP - Appendix M - Discharge Monitoring Report (DMR) Form (pdf) (2.48 MB)
• Proposed 2026 MSGP - Appendix N - List of SIC and NAICS Codes (pdf) (2.09 MB)
• Proposed 2026 MSGP - Appendix O - Summary of Reports Permit Submittals (pdf) (191.15 KB)