The NYC Department of Environmental Protection (DEP) protects public health and the environment by supplying clean drinking water, collecting and treating wastewater, and reducing air, noise, and hazardous materials pollution. DEP is the largest combined municipal water and wastewater utility in the country, with nearly 6, employees. DEP delivers more than 1.1 billion gallons per day of the highest quality drinking water to 8.5 million NYC residents and more than 1 million people in Upstate New York, and has a wastewater conveyance and treatment system capable of processing over 1.3 billion gallons of wastewater per day to protect the environment and the city's surrounding waterways.

New York City has approximately , catch basins, , hydrants, 90, valves, 14 gatehouses, 3 reservoirs, 68 groundwater wells, a million gallon underground storage tank and 7, miles each of both sanitary sewers and water mains. The responsibility of maintaining these vast networks falls under the D...