New Croton Reservoir

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The New Croton Reservoir is a narrow reservoir in Westchester County, New York, lying approximately 22 miles (35.2 km) north of New York City, which the reservoir supplies water to. It is the collecting point for water from all reservoirs in the Croton Watershed. The original reservoir was called "Croton Lake", and was New York City's first upstate source of water, being completed in 1842 by damming the Croton River, which is a tributary of the Hudson River. However, around the turn of the last century, the City of New York enlarged the reservoir by constructing the New Croton Dam to supply the city with more water.

The new enlarged reservoir, being completed in 1905, is one of the bigger of the small reservoirs, and is the largest reservoir in the Croton Watershed. It is approximately 9 miles (approximately 14.4 km) long, and it can hold 19 billion gallons (71.9 million m³) of water at full capacity. It also has a drainage basin that covers 57 square miles (91.2 km²) of land. A drainage basin is an area surrounding a major body of water where there are minor bodies of water that flow into the bigger one.

The drinking water from the reservoir flows into the New Croton Aqueduct while about three-quarters of the way through the reservoir. From there it goes to the city, and enters the Jerome Park Reservoir in The Bronx. It then continues to flow through the rest of the city until the water from the New Croton Aqueduct mixes with water from the Catskill Aqueduct in Manhattan. It finally continues through the NYC boroughs of Brooklyn and Staten Island, where the water comes to a halt.