Stormwater Discharges from Municipal Sources | US EPA
Jun 6, 2025 · MS4 Resources Fact Sheet (pdf) (1.06 MB) - Overview of outreach materials and funding resources available from EPA.
Stormwater Permits for Municipal Separate Storm Sewer Systems ...
Sep 30, 2025 · Waiver Option 1 from MS4 Permitting Requirements (Small Systems Only) Explains the waiver from the permitting requirement available to small MS4s that serve a population of less than …
Municipal stormwater (MS4) | Minnesota Pollution Control Agency
Local public entities that own or operate municipal separate storm sewer systems (MS4) play a key role in preventing stormwater runoff from harming Minnesota’s valuable water resources.
Municipal Separate Storm Sewer System - DEP - NYC.gov
A municipal separate storm sewer system (MS4) is a publicly-owned conveyance or system of conveyances (including but not limited to streets, ditches, catch basins, curbs, gutters, and storm …
Municipal Separate Storm Sewer Systems (MS4s) - South Carolina
By definition an MS4 is a system of conveyances that include, but are not limited to, catch basins, curbs, gutters, ditches, man-made channels, pipes, tunnels, and/or storm drains that discharge into Waters …
Municipal Stormwater Program - State of Michigan
An MS4 is a system of drainage (including roads, storm drains, pipes, and ditches, etc.) that is not a combined sewer or part of a sewage treatment plant. During wet weather, pollutants are transported …
Municipal Separate Storm Sewer Systems (MS4) | Florida ...
Dec 14, 2024 · A municipal separate storm sewer system (MS4) is a publicly-owned conveyance or system of conveyances (i.e., ditches, curbs, catch basins, underground pipes, etc.) designed or used …