MS4 (Stormwater discharges from Muncipal Sources)

The Pennsylvania Department of Environmental Protection's Bureau of Watershed Management issues MS4 permits. These permits govern storm water discharges from small Municipal Separate Storm Sewer Systems (MS4). Click here for the definition of what is an "illicit discharge" - ILLICIT DISCHARGE.  

As an MS4 permittee, Union Township must comply with 6 Minimum Control Measures (known as MCM's) when required to follow the MS4 program.  CURRENTLY UNION TOWNSHIP RECEIVED A WAIVER FOR THE PROGRAM FROM DEP AND IS NOT REQUIRED TO PARTICIPATE.  The following is for information purposes:

  • MCM #1: Public Education and Outreach on Storm Water Impacts

  • MCM #2: Public Involvement /Participation

  • MCM #3: Illicit Discharge Detection and Elimination (IDD&E)

  • MCM #4: Construction Site Storm Water Runoff Control

  • MCM #5: Post-Construction Storm Water Management in New Development and Redevelopment

  • MCM #6: Pollution Prevention / Good Housekeeping for Municipal Operation

Information Links

DEP Stormwater Management

EPA Stormwater Management




Click below to see an MS4 information brochure