Titicus Reservoir is one of 12 in the New York City Water Supply System's Croton watershed. It is located in the Town of North Salem in Westchester County, 30 miles (48 km) north of the city.
At full capacity it holds 7.2 billion gallons (2.7 million m³). It is 681.5 acres (2.7 km²) in area, two miles (3.2 km) long, reaches a mean depth of 32 feet (9.8 m) and drains a 24-square mile (62.4 km²) area in North Salem and Lewisboro.
Water from the reservoir goes first along the Titicus to the Muscoot Reservoir, then into New Croton Reservoir and finally along the 24-mile (38.6-km) New Croton Aqueduct to the Jerome Park Reservoir in the Bronx, where it is part of the city's daily draw.
It has been supplying the city since 1893.