Highlights The U.S. Environmental Protection Agency (EPA) has published its National Pollutant Discharge Elimination System (NPDES) 2021 Issuance of the Multi-Sector General Permit for Stormwater Discharges Associated with Industrial Activity (MSGP). Several items from the proposed 2020 MSGP were not adopted in the final version, including a coal-tar sealcoat prohibition, expansion beyond the 2015 MSGP provisions for permitted discharges to CERCLA/Superfund sites, automatic delays to new discharger authorization due to enforcement, universal benchmark monitoring for all dischargers (as oppose...