Stormwater & MS4

What Is MS4?

Untreated or uncontrolled storm water runoff is the number one cause of impairment in our local waterways. Polluted runoff is often transported through municipal drainage systems until it eventually discharges into streams, lakes, and rivers untreated.
An MS4, or Municipal Separate Storm Sewer System, is comprised of drainage systems, including streets, catch basins, curbs, gutters, ditches, man-made channels and storm pipes, owned by a state, county, city, town, township, borough or other public entity.
The National Pollutant Discharge Elimination System (NPDES) storm water Phase II regulations require permit coverage for storm water discharges from MS4s, mainly those located in urbanized areas.
Therefore, most Townships and Boroughs are required to  comply with the MS4 Program.

 This newsletter will provide more information on MS4.
SLT - stormwater MS4


 The following links will provide valuable information on stormwater management and it's importance.
    1.      Table of Contents and pages 1 - 25
    2.      Appendix A
    3.      Maps: A4  A5-B4  B5  C1-C7  D1-D4  E1-E7  F2-F7  G2-H4
    4.      Appendix B