What is the definition of a Combined Sewer System?

A Combined Sewer System is defined as a sewer system that combines storm water and sanitary sewage into one pipe system. This design is intended to manage both types of waste effectively by channeling them to a treatment facility. During periods of heavy rainfall, however, this system can become overwhelmed. When the flow exceeds the capacity of the treatment plant, the excess mixture of storm water and sewage can overflow into local water bodies, leading to potential environmental and public health concerns. Acknowledging this definition helps in understanding city planning and water management strategies, especially in urban areas where such systems are prevalent.