DCR's Division of Water Supply Protection, Office of Watershed Management (DWSP) manages and protects the the Quabbin Reservoir, Ware River, Wachusett Reservoir, and Sudbury Reservoir watersheds, the source drinking water supply for 3 million people.
Follow the links below to visit the watersheds and find out details about public access rules and maps, water quality, education, planning, forestry, and other natural resource protection activities.
Visit the watersheds
Who we serve
DWSP provides the Massachusetts Water Resources Authority (MWRA) source water for treatment and distribution to 51 communities. The DCR/MWRA water supply system is one of the few unfiltered drinking water supplies in the country.
The mission of DWSP is to utilize and conserve water and other natural resources to protect, preserve and enhance the environment of the Commonwealth and to assure the availability of pure water for future generations.
- Click here for an Interactive Watershed System Description: Definitions, Facts, Figures, and Maps.
- DWSP Watershed Protection Plan Achievements from 2014 to 2018 - an ArcGIS Story Map is a summary of major accomplishments by DWSP staff from July 1, 2014 through June 30, 2018.
- See current conditions at Quabbin Reservoir from the MWRA Quab-cam.