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State permit
GP-0-25-001: New York construction stormwater permit
GP-0-25-001 is the general permit NYS Department of Environmental Conservation (NYSDEC) issues for stormwater from construction sites in New York. Effective / expires: 2025-01-29 / 2030-01-28. This page lists the rules a plan has to meet, each cited to the permit text or the agency page, checked October 20, 2026.
Sources last checked October 19, 2026. Prepared by our team led by Mohamed Elansary, PhD, with AI research tools. We are not a licensed engineering firm and do not seal plans.
General information; your permit text controls. Not legal advice and not engineering judgment. We make no promise of permit coverage, agency acceptance or compliance.
GP-0-25-001 at a glance
| Item | Rule | Source |
|---|---|---|
| Permit | SPDES General Permit for Stormwater Discharges from Construction Activity (GP-0-25-001) | Source |
| Agency | NYS Department of Environmental Conservation (NYSDEC) | Permit text, permit cover |
| Effective / expires | 2025-01-29 / 2030-01-28 | Permit text, permit cover |
| Refile | 2030-01-28: Coverage continues to expiry | Permit Document section: 'effective January 29, 2025, and expires on January 28, 2030' |
| How to file (NOI) | eNOI in DEC nForm with SWPPP Preparer Certification, Owner/Operator Certification, and MS4 SWPPP Acceptance or No Jurisdiction form | Permit text, Part III.A.4 (Qualified Professional), Part IV.C (Qualified Inspector, frequency), Appendix A (definitions), Appendix B Table 1 |
| Fee | SPDES fee table (initial + annual); amounts on the agency fee table | Permit text, Part III.A.4 (Qualified Professional), Part IV.C (Qualified Inspector, frequency), Appendix A (definitions), Appendix B Table 1 |
| Who may write the plan | SWPPPs that need the post-construction (SMP) component must be prepared by a Qualified Professional (Part III.A.4; App. A definition: PE, RLA or DEC-endorsed); engineering components by or under a NY PE. E&SC-only SWPPPs (Appendix B Table 1 projects) have no preparer credential rule | Permit text, Part III.A.4 (Qualified Professional), Part IV.C (Qualified Inspector, frequency), Appendix A (definitions), Appendix B Table 1 |
| Inspector | Qualified Inspector (App. A: PE, CPESC, RLA, NYS Erosion and Sediment Control Certificate holder, or trained staff under a PE/RLA) (Part IV.C) | Permit text, Part III.A.4 (Qualified Professional), Part IV.C (Qualified Inspector, frequency), Appendix A (definitions), Appendix B Table 1 |
| Inspection frequency | At least once every 7 calendar days; twice every 7 days (2 full days apart) for 5+ ac disturbed at once or Appendix C/D waters; every 30 days during winter shutdown (Part IV.C.2) | Permit text, Part III.A.4 (Qualified Professional), Part IV.C (Qualified Inspector, frequency), Appendix A (definitions), Appendix B Table 1 |
| What we cover | E&SC-only SWPPPs (no post-construction practices; Appendix B Table 1 project types) outside New York City. You provide the Qualified Inspector (Part IV.C). | New York hub and coverage by state |
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