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Why are MS4s Important?

MS4s each develop a stormwater management program (SWMP) that helps them decide how to reduce the discharge of pollutants from its sewer system.

According to the EPA, SWMPs address the following topic areas:

  • Construction Site Runoff Control

  • Illicit Discharge Detection and Elimination

  • Pollution Prevention/Good Housekeeping

  • Post-Construction Runoff Control

  • Public Education and Outreach

  • Public Involvement/Participation

  • Program Effectiveness

  • Total Maximum Daily Loads

What is an MS4?

According to the United States Environmental Protection Agency (EPA), an MS4 is a conveyance, or system of conveyances, that is:

  • "owned by a state, city, town, village, or other public entity that discharges to waters of the U.S.,

  • designed or used to collect or convey stormwater (e.g., storm drains, pipes, ditches),

  • not a combined sewer, andnot part of a sewage treatment plant, or publicly owned treatment works (POTW)."

MS4 stands for Municipal Separate Storm Sewer Systems

Resident Participation - We Need Your Help!

Residents play a vital role in ensuring the success of the SWMP. By taking specific actions, individuals can significantly reduce pollution and contribute to a healthier environment.

 

Here are some actions residents can take to participate in the SWMP:

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Litter, Trash Containment, and Balloon Releases

  • Properly dispose of all litter in designated trash cans.

  • Ensure trash can lids are secure to prevent windblown debris.

  • Never allow trash or litter to enter storm drains.

  • Avoid releasing balloons outdoors.

​

Pet Waste

  • Always pick up pet waste immediately.

  • Dispose of pet waste in designated pet waste stations or securely in the trash.

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