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New York City's Wastewater Treatment System

When you take a shower or brush your teeth, do you ever wonder where where the water goes? Each day, we treat 1.3 billion gallons of wastewater at New York City's 14 wastewater treatment plants. After the treatment process, the plants release the treated wastewater, called effluent, into the waterways surrounding New York City.

Between your drain and our wastewater treatment plants is an elaborate network of sewers. This network consists of over 7,400 miles of sewer pipes, 135,000 catch basins, 495 outfalls for the discharge of combined sewer overflows (CSOs), and 95 wastewater pumping stations.

Each person can help these systems run better by conserving water, disposing of garbage and household chemicals properly and being concerned about water quality in the New York City's waterways.

Table of Contents

History of New York City Water
Wastewater Treatment Process
Where Sludge Goes
How New York City Protects Its Water Environment
Environmental Concerns
Pollution Control Programs
Diagram of Treatment Process
How You Can Make a Difference
Map of New York City Plant Locations and Capacities
New York City Wastewater Treatment Plants
DEP Sludge Vessels
Wastewater Treatment Plants Before Modernization

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