The Quabbin Reservoir is the largest lake in the Commonwealth of Massachusetts and was built in 1930-1939 by the construction of Winsor Dam and other dams. Today it forms together with the Wachusett Reservoir, the main water supply for the city Boston, about 65 miles east area, and 40 other municipalities in the Greater Boston metropolitan area. The reservoir also provides water to three westernmost cities. The memory space of the reservoir is 1.56 km ³, the water area is about 99.97 km ². The waters of the Quabbin Reservoir flows over the Quabbin Aqueduct for Wachusett Reservoir. The Quabbin Reservoir is maintained by the Massachusetts Department of Conservation and Recreation, while the actual water supply is managed by the Massachusetts Water Resources Authority. The Winsor Dam and Goodnough Dike the dam the Swift River and its tributaries. The Quabbin Reservoir is part of the catchment area of the Chicopee River.
Beginning of the 19th century extended Metropolitan Boston from its local water supply. Different ways ( rivers and groundwater ) were examined, but did not meet the requirements for quantity and quality of water of an ever-growing metropolitan area. Finally, the Massachusetts General Court authorized ( the official name of the state legislature) the construction of the Cochituate Aqueduct, which should guide water from Lake Cochituate in Wayland and Natick to Boston.