On December 13, 2023, the New York State Department of Environmental Conservation (NYSDEC) released the updated version of the State Pollutant Discharge Elimination System (SPDES) General Permit for Stormwater Discharges from Municipal Separate Storm Sewer Systems (MS4), superseding the current general permit (GP-0-15-003). The new general permit, which is designated as GP-0-24-001, will go into effect January 3, 2024.
This new permit incorporates changes made by NYSDEC over several years in response to public comments on proposed revisions. GP-0-24-001 contains additional requirements for MS4 operators related to the development and implementation of stormwater management programs that reduce discharge of pollutants in order to protect water quality.
Walden is currently reviewing the new general permit to identify what MS4 communities must do to achieve and maintain compliance. We will follow up with another blog to provide more details on these requirements. If you have any questions or concerns regarding these MS4 general permit updates or if you need help with writing or implementing a stormwater management program, contact Walden at 516-563-5156. Our team of trained staff can help you navigate these new requirements.