In 2011, the Philadelphia Water Department (PWD) developed the Green City, Clean Waters (GCCW) plan to address the City of Philadelphia’s Clean Water Act obligations. Since that time, the Department has been committed to reducing combined sewer overflows primarily through the implementation of green stormwater infrastructure (GSI).
Almost ten years into the program, hundreds of projects have been built across the combined sewer area and by 2036, the goal is to have managed around 35% of the impervious area within the area of the city serviced by the combined sewer system.
