Wachusett Reservoir

The Wachusett Reservoir is the second largest body of water in the state of Massachusetts. It is located in central Massachusetts, northeast of Worcester. It is part of the water supply system for metropolitan Boston maintained by the Massachusetts Water Resources Authority. It has an aggregate capacity of 65 billion US gallons and an area of almost 7 square miles. Water from the reservoir flows to the covered Norumbega Storage Facility via the Cosgrove Tunnel and the MetroWest Water Supply Tunnel. The reservoir has a maximum depth of 120 feet and a mean depth of 48 feet.

The reservoir serves as both an intermediate storage reservoir for water from the Quabbin Reservoir, and a water source itself, fed by its own watershed. The reservoir is fed by the Quinapoxet and Stillwater rivers, along with the Quabbin Aqueduct, which carries water from the Quabbin Reservoir.