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Penn Township
Telephone: 717-632-7366                 20 Wayne Ave Hanover, PA 17331                            Fax: 717-632-2464
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MS4 / Stormwater Management

What is Stormwater Management? 

    This past summer many of our communities in York County, and Penn Township experienced flooding from high intensity storm events. These events are becoming more frequent and cause expensive damage to public and private properties. In addition, the stormwater runoff from these events pollute our streams with sediment from stream banks, chemicals, and nutrients from agricultural fields, yards, and roadways. Community impacts from flooding are a direct result of how we manage our land. Decades of development was happening in Penn Township before stormwater management was required. In the 1970’s, and 80’s municipalities all over the state began to adopt ordinances to guide development. It is only within the past decade that municipalities are also required to address the ‘quality’ or ‘cleanliness’ of stormwater within the set ordinances.

    The federal Clean Air and Water Act (CWA) of 1972 establishes the basic frame work to regulate the many pollutants discharged into the Waters of America. The CWA is administered by the United States Environmental Protection Agency (EPA). Many of the federal water regulations are delegated by state environmental agencies, in our case the Pennsylvania Department of Environmental Protection (DEP). In addition to federal water pollution requirements, Pennsylvania is required to meet additional thresholds to do our part in keeping the amount of pollution in the Chesapeake Bay to a minimum. 

   Penn Township was notified of its designated as a small MS4 on July 6, 2016. A “Notice of Intent” (NOI) to discharge under the statewide General Permit was filed in September 2017 for the permit term beginning March 16, 2018.  

    Under the MS4 Program, permittees are required to incorporate the following six elements (known as minimum control measures, or MCMs) into their stormwater management programs:

  • Public education and outreach
  • Public involvement and participation
  • Illicit discharge detection and elimination
  • Construction site runoff control
  • Post-construction stormwater management in new development and redevelopment
  • Pollution prevention and good housekeeping for municipal operations and maintenance


    Each MCM has a series of suggested best management practices (BMPs) associated with it to guide permit holders in program development, tracking, and reporting.


MS4 Stormwater Staff:

Caylyn Hall - chall@penntwp.com

Informative Links
For questions, comments, or concerns regarding stormwater management, illicit discharges, construction runoff, or the storm sewer system: Call (717) 632- 7366 ext. 145 or ext. 124 outside of normal hours.
Learn more about how you can help reduce pollution in stormwater! Video courtesy of Minnesota Stormwater.
What is MS4?