"The new Paerdegat Basin Combined Sewer Overflow Facility is expected to reduce such discharges by about 70 percent a year, or 1.2 billion gallons.
The plant is the largest yet of several facilities the city has built to deal with a problem that contaminates waterways and create foul odors: during heavy rains, the combined sewer system carrying both wastewater and storm water runoff often overwhelms the capacity of sewage treatment plants, resulting in discharges into surrounding bodies of water."
Located on Jamaica Bay in Brooklyn, the plant will serve as an overflow storage system in an effort to reduce pollution of the city's waterways.