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New York City’s Wastewater
New York City’s 14 wastewater treatment plants together treat 1.3 billion gallons of wastewater daily. Our system combines sanitary flow, created each time a New Yorker turns on a tap, runs a washing machine or flushes a toilet, and runoff that enters our sewers whenever it rains or snows. This complex system quietly does a job we simply can’t live without. This section provides an in-depth look at New York City's wastewater treatment process. Topics include the testing of New York City waterways, pollution control programs, beneficial use of biosolids, and how you can make a difference.
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New York’s Wastewater Treatment System
The amazing treatment system that cleans our wastewater consists of: over 6,000 miles of sewer pipes; 135,000 sewer catch basins; over 495 permitted outfalls for the discharge of combined sewer overflows (CSOs); 95 wastewater pumping stations that transport it to 14 wastewater treatment plants located throughout the 5 boroughs.
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Preventing Fats, Oils, and Grease Discharges Into Sewers
Residential and commercial guidelines for preventing the discharge of fats, oil grease into public sewers.
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Biosolids Management Program
New York City produces approximately 1,200 tons of biosolids every day from its fourteen water pollution control plants. In 1988, ocean disposal of biosolids was banned by the federal government and New York City was required to find alternative land-based use for this material.
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Significant Non-compliance List
DEP is required to publish a list of establishments in New York City that were in significant non-compliance with pretreatment standards and other wastewater requirements.
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