PWD manages and treats Philadelphia wastewater, which includes the upkeep of more than 3,000 miles of sewer. We use a system of combined sewers in approximately half of the city’s neighborhoods and a separate sewer system in the other half.
Combined Sewer System
In areas with combined sewers, a single pipe carries both stormwater from streets, houses, and businesses as well as wastewater from houses and businesses to a wastewater treatment plant. Many of the older sections of our city are served by a combined sewer system.
Separate Sewer System
In areas with separate sewers, one pipe carries stormwater to the city’s streams while another carries wastewater to a wastewater treatment plant.