Storm Sewers & Stormwater Management

Stormwater management involves the control of water that runs off the surface of the land from rain or melting ice or snow. The volume, or amount of runoff and its rate of runoff, substantially increases as land development occurs. Construction of impervious surfaces, such as roofs and parking lots, and the installation of storm sewer pipes which efficiently collect and discharge runoff, prevent infiltration of rainfall into the soil.

Management of stormwater is necessary to compensate for the possible impacts of development such as flooding, erosion and sedimentation problems, concentration on flow on adjacent properties, damages to roads, bridges and other infrastructure as well as non-point source pollution washed off from impervious surfaces.

Reporting Stormwater Pollution

Please report any illicit stormwater pollution to the Upper St. Clair Public Works Department. Prohibited non-stormwater discharges include:

• Fuel/oil
• Grease
• Construction
• Cash wash soaps
• Paint
• Grass Clippings

MS4 Permit:  Municipal Separate Storm Sewer System

Did you know that your municipality has a Municipal Separate Storm Sewer System (MS4) permit? The underlying goal of the MS4 program is to prevent stormwater pollution from entering streams, lakes, ponds, and rivers, etc.  Read more about this stormwater management program and required control measures here:

• Overview of MS4 Permit: Municipal Separate Storm Sewer System
• MS4 Permit Educational Article
• MS4 Permit Education: Public Education & Outreach

On Monday, July 28, 2025, the Township Engineer presented MS4 Stormwater and Consent Order Updates at the Informational & General Affairs Meeting of the Board of Commissioners.

What You Can Do

We need everyone to do their share in creating a safe and healthy environment. Anything that goes into the storm inlets flows directly into the streams without being treated. The most important thing to consider is that what you may dump into the storm inlet does not only affect you, but it affects your neighbors and other communities that the streams flow through. Please be safe and cautious and keep the following things in mind to prevent pollution.

• Dumping used motor oil or other toxic wastes down the storm inlets eventually finds its way to the streams. Do not dump these hazardous wastes into the inlets; take them to a recycling center instead.
• Leaking oil contributes to pollution; therefore servicing your car regularly helps the environment.
• Don't litter. Always dispose trash in its proper location. Styrofoam, plastics and other debris can injure and kill fish and wildlife.
• When using fertilizers and pesticides, follow the label for use and storage methods.
• Help prevent erosion by planting steep slopes and planting bare spots. This soil will erode the stream banks and harm all fish and wildlife.
• Paint Smart!