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    • Board
      • Board Information
      • Meetings
      • Resolutions
      • By-Laws
    • Information
      • Applications & Forms
      • Rates
      • Financial Statements
    • Dye Tests
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    • Pretreatment
    • About Us
    • Right-To-Know Law
    • Act 44 Disclosure
    • Contact Us
wmssma
  • Home
  • Board
    • Board Information
    • Meetings
    • Resolutions
    • By-Laws
  • Information
    • Applications & Forms
    • Rates
    • Financial Statements
  • Dye Tests
  • Stormwater / MS4
  • Pretreatment
  • About Us
  • Right-To-Know Law
  • Act 44 Disclosure
  • Contact Us

STORMWATER / MS4

Click here to view 2023 Infrastructure Repairs & Replacements completed by WMSSSA.

Click here to view 2024 Infrastructure Repairs  & Replacements completed by WMSSSA 

What is MS4?

The Municipal Storm Sewer System (MS4) is a federal mandate to implement a stormwater management program to help reduce pollution & other harmful, negative impacts in stormwater runoff.  Any form of precipitation such as rain, sleet, snow, & ice are all considered to be forms of storm water. Basically, any drop of water falling from the sky withing our Borough is MS4 regulated. The West Mifflin Sanitary Sewer & Stormwater Authority is now required to keep up with inspections, repairs, monitoring, & general maintenance of storm water within our entire municipality. The MS4 program is administrated by the Pennsylvania Department of Environmental Protection (PA DEP).  The DEP has approved WMSSSA as the permittee holder & the WM Borough is now a co-permittee on the MS4 permit. Both will be working together to help meet the annual MS4 requirements.  This is a required permit; it is not optional. This permit requires us to have the appropriate plans in place to reduce the number of pollutants, or any illicit discharge from getting into all of our streams and waterways.

West Mifflin MS4 Documents

Permits

NPDES PERMIT NO. PAG136166 A-1 

Click here to download


Annual Reports

Annual MS4 Status Report 7/1/22 - 6/30/23 

Click here to download

Annual MS4 Status Report 2023 - 2024 

Click here to download


Pollution Reduction Plan

PRP/TMDL Plan Final Report 

Click here to download



    Click here to download the Illicit Discharge Flyer

    Click here to download the Illicit Discharge Complaint Form

    Property Owners Role in MS4

    Every person in our community plays a very important role in MS4 to help us reach our regulatory goals. Pollution prevention goes along with good housing/property upkeep. As a property owner you can do the following to help with some of these pollution issues:


    Click here to read the Homeowners guide to Stormwater BMP Maintenance. 

    · Report illicit discharge to the West Mifflin Sanitary Sewer Municipal Authority.

    · Consider a rain garden, or rain barrel to capture runoff.


    Be Stormwater Smart (DEP) -https://www.dep.pa.gov/Business/Water/CleanWater/StormwaterMgmt/Pages/Be-Stormwater-Smart-.aspx


    Quick Resource Guide (DEP) -  https://files.dep.state.pa.us/EnvironmentalEd/Environmental%20Education/EnvEdPortalFiles/MS4%20Resource%20Guide.pdf 


    Environmental Protection Agency Stormwater Program (EPA) - 

    https://www.epa.gov/npdes/npdes-stormwater-program


    Construction Site – Erosion and Sediment Control

    https://www.respectourwaters.org/erosion-control

    DEP Stormwater Management Brochure

    Download PDF

    Click here to download the MS4 Requirements for West Mifflin Borough /  West Mifflin Sanitary Sewer & Stromwater Authority curteousy of Marisa Brletic of KLH Engineers, Inc.

    Click here to view Watersheds & Rain Barrels presentation from Laura Blood at Pennsylvania Resources Council.

    Where does Stormwater Go?

    Check out Practical Engineering's video on "Where does Stormwater Go" on their youtube channel.

    PA DEP Stormwater

    Pennsylvania Department of Environmental Protection's video on understanding stormwater and its role in protecting our environment.

    Fairchild Challenge – Mock Town Hall

     WMSSSA worked with West Mifflin Area High Schools Environmental Club students to bring Stormwater Awareness through a “mock town hall video” that was submitted for Phipps Conservatory’s Fairchild Challenge. 

    Thompson Run Creek Results

     The WMAHS Environmental Club also conducts creek testing at the Thompson Run Creek, along Lower Bull Run Road, where out Wastewater Treatment Plant is located. See above for Creek Results, data supplied by Allegheny College. Click here to download the PDF.

    Environmental Day Flyer 2025

     WMSSSA teamed up with the WMAHS Environmental Club to bring awareness to Stormwater Pollution for Earth Day. Congratulation to our 11th grade winner, Rinad!

    Click here to download the PDF.

    Walnut Grove Stormwater COloring COntest Winners

    Stormwater Stream Clean Up Event

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