Pepacton Reservoir

Water type: Artificial lake
Continent: North America
Climate: Temperate

The Pepacton Reservoir, also known as the Downsville Reservoir, is a reservoir in Delaware County, New York on the East Branch of the Delaware River in the Catskill Mountains of New York. Part of the New York City water supply system, it was formed by the construction of Downsville Dam, and impounds over one-quarter of the East Branchs flow.

The reservoir lies 19 km south of the village of Delhi and is 163 km northwest of New York City. It is narrow and winding, some 24 km long and about 1.1 km across at its widest point. The reservoir is over 49 m deep at its maximum point and contains 530,713,000 m3 of water at full capacity. This makes it the city water systems largest reservoir by volume.