Customer Service: 610-876-5526Sewer Emergency: 610-876-5523 (Press 2)
  • Inner_CombinedSewerSystem

Combined Sewer System

Combined sewer systems are sewers that are designed to collect rainwater runoff, domestic sewage, and industrial wastewater in the same pipe. Most of the time, combined sewer systems transport all of their wastewater to a sewage treatment plant, where it is treated and then discharged to a water body. During periods of heavy rainfall or snowmelt, however, the wastewater volume in a combined sewer system can exceed the capacity of the sewer system or treatment plant. For this reason, combined sewer systems are designed to overflow occasionally and discharge excess wastewater directly to nearby streams, rivers, or other water bodies.

These overflows, called combined sewer overflows (CSOs), contain not only stormwater but also untreated human and industrial waste, toxic materials, and debris. They are a major water pollution concern for the approximately 772 cities in the U.S. that have combined sewer systems.

For more information contact us.

Customer Service: 610-876-5526

Sewer Emergency: 610-876-5523 (Press 2)

Contact Us

Pay Sewer Bill
Administration Building

100 East Fifth Street

Chester, PA 19013



Wastewater Treatment Plant

3201 West Front Street

Chester, PA 19013