Stormwater and Clean Stream Management

Why is stormwater management important?

Unlike water that enters your municipal sewage system, stormwater is NOT cleaned and treated at a wastewater plant before it re-enters our streams and waterways. Stormwater runoff from roads and other impervious areas comes into contact with pollutants and allows those pollutants into our waters. It is essential that municipalities put in place a focused Stormwater Management Program (SWMP) to combat polluted stormwater runoff.

West Goshen’s Responsibility

The stormwater requirements of the federal Clean Water Act and the National Pollution Discharge Elimination System (NPDES) are administered under the Pennsylvania Department of Environmental Protection (DEP) and implemented by DEP through the Municipal Separate Storm Sewer Systems (MS4) Program.  Almost all municipalities in Pennsylvania must have an MS4 permit.

West Goshen Township must comply with its MS4 permit through a robust stormwater management program. For more information on the MS4 program go to DEP’s MS4 Resource Page.

West Goshen Township Stormwater Map

Through the efforts of Township Engineering Department staff, please see below the Township-wide stormwater map, showing all available data, including stormwater basin locations, inlets, drainage pipes and other pertinent stormwater data.  The map is a large Adobe Acrobat (11MB) file and may be viewed and enlarged to show individual streets and stormwater facilities.

Minimum Control Measures and Best Management Practices

In order to improve stream and waterway quality, federal regulations establishes Minimum Control Measures (MCMs) that must be implemented through the MS4 program. The six regulations are:

  1. Public Education and Outreach
  2. Public Participation and Involvement
  3. Illicit Discharge Detection and Elimination
  4. Construction Site Runoff Control
  5. Post-Construction Stormwater Management in New Development and Redevelopment
  6. Pollution Prevention and Good Housekeeping for Municipal Operations and Maintenance

Municipalities meet these MCM requirements through a series of Best Management Practices (BMPs) which are schedules of activities, prohibition of practices, structural controls, design criteria, maintenance procedures, and other management practices that reduce pollution to the waters of the Commonwealth.

For more information on MCMs and BMPs please go to the U.S. Environmental Protection Agency (EPA) MS4 Page where Minimum Control Measures along with the respective Best Management Practices are listed and explained.


The Total Maximum Daily Load (TMDL) is the maximum amount of a pollutant that a waterbody can receive in order to meet water quality standards. Section 303(d) of the Clean Water Act requires that states develop impaired waters lists for rivers, lakes, coastal waters, and estuaries that do not meet water quality standards.  If a municipality has an MS4 that discharges into an impaired waterbody with a TMDL, it is required to have a TMDL control plan in order to control pollutants and to ensure incremental progress is made. West Goshen, along with many other municipalities in Southeastern PA, is required to have such a plan.  Please review EPA’s web page on Impaired Waters and Total Maximum Daily Loads.

Basin Road Stormwater Basin Retrofit Project

West Goshen Township received a Pennsylvania “Growing Greener” grant to retrofit and existing 2.2 acre, Township-owned stormwater basin serving the Stoneybrook development on Basin Road.  The stormwater basin was designed and built in the early 1970’s and has ceased to function as designed and is woefully inadequate under current stormwater regulations.  The stormwater basin receives stormwater from an approximately 70 acre drainage area.

The Township sought and received the grant to assist the Township in design, reconstruction and retrofit of the existing basin.  Environmental engineering and design firm AKRF, located in Center City Philadelphia, assisted in drafting the grant application and is doing the design and permitting work on behalf of West Goshen Township.

Please see the 30% design update presentation below from a public meeting held on July 26, 2017.  This project will assist the Township in meeting its next MS4 permit cycle with the Pennsylvania Department of Environmental Protection.

You Can Help!

Municipalities cannot do this alone. Public participation is vital to our clean stream program. Here are some ways that you can make a difference:

  • Organize a stream cleanup event
  • Form a stormwater pollution watch
  • Mark storm drains with warnings about dumping (Call township building to get a marker)
  • “Adopt-an-Inlet” if a stormwater inlet exists near or on your property. Ensure that the inlet is clear and unobstructed
  • Have a wetland planting event
  • Remove impervious surface from your property and replace with green space
  • Practice good household habits (pick up pet waste, properly dispose of grass clipping, use commercial carwash, etc)

For more information on public participation please visit the EPA’s Stormwater Public Involvement page.

Educational Materials

Below you will find various links and educational material related to stormwater management and our clean stream initiative:

Stream Maintenance for Property Owners - New

Let’s Be “Stormwater Smart” Pennsylvania – DEP Video

When It Rains, It Drains

The Homeowner’s Guide to Stormwater

Stormwater Management for Small Projects

Green Guide for Property Management

Chlorinated Water Discharge Guidelines

Water Resources Education Center

      Homeowners Guide to Stormwater BMP Maintenance

EPA Links

National Menu of Stormwater Best Management Practices

Stormwater Homepage

Understanding TMDLs and Impaired Waters

Nonpoint Source (NPS) Outreach Toolbox

EPA MS4 Page

Kids Stormwater Page

County and State Links

DEP’s MS4 Resource Page

DEP Stormwater Management


PA BMP Manual

Chester County Water Resources Authority

Chester County Conservation District

Watershed Information

What Is A Watershed?

Chester-Ridley-Crum Watersheds Association

Laws and Ordinances

Clean Water Act

Stormwater Management Act

West Goshen Stormwater Management Ordinance

2017.07.19 West Goshen TMDL Report 2017-Draft
2017.07.19 West Goshen TMDL Report 2017-Draft
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