MS4 Permit Updates: What You Need to Know
The Pennsylvania Department of Environmental Protection (PADEP) recently released guidance outlining draft updates to the Municipal Separate Storm Sewer System (MS4) program. These proposed changes aim to shift the focus from pollutant reduction to volume management — impacting how municipalities plan, fund, and document stormwater management activities. Key Updates at a Glance Volume Management Plans (VMPs) will replace Pollutant […]