The New York City Department of Environmental Protection (NYCDEP) manages the city’s water supply providing more than 1.1 billion US gallons (4200000 m3) of water each day to more than 9 million residents (including 8 million in the City of New York) through a complex network of nineteen reservoirs three controlled lakes and 6000 miles (9700 km) of water mains tunnels and aqueducts.
