The Division of Water Supply Protection is comprised of the Office of Watershed Management and the Office of Water Resources.

The Office of Watershed Management manages and protects the drinking water supply watersheds for approximately 2.5 million residents of Massachusetts, primarily in Greater Boston.

The Quabbin Reservoir , Ware River , and Wachusett Reservoir watersheds are the sources of drinking water for distribution by the Massachusetts Water Resources Authority (MWRA).

The Office of Water Resources promotes water quality and conservation through water resources policy and planning efforts.