Proposed 2026 MSGP Redefines Industrial Stormwater Strategy
The U.S. Environmental Protection Agency’s proposed 2026 Multi-Sector General Permit (MSGP) for industrial stormwater is not yet final or enforceable. It remains in the proposal stage following public comment and will not take legal effect until EPA issues a final permit in the Federal Register. In the meantime, the 2021 MSGP, which expired on Feb. 28, 2026, continues in force under administrative continuance for facilities that previously obtained coverage.
