The State Organization Index provides an alphabetical listing of government organizations, including commissions, departments, and bureaus.
Top-requested sites to log in to services provided by the state
Learn about drinking water safety, and about the programs and policies that keep it safe.
What consumers and Boards of Health should know about the safety of our drinking water.
What you need to know about lead in drinking water, and what MassDEP is doing about it.
Guidance, Water Quality & Testing, and Other Resources for Private Wells
Information for owners and operators of public water supplies
Find information on applying for, renewing, checking, and learning about Drinking Water Supply Facility Operator Licensing.
Forms, applications, and online filing for drinking water suppliers subject to 310 CMR 22.00 Drinking Water Regulations.
EEA offers various grants and loans for water projects.
Information about Assessing, Protecting and Managing Drinking Water Sources
The Office of Research and Standards (ORS) provides scientific expertise to MassDEP in environmental health, toxicology, standard setting, ecological and human health risk assessment, chemistry and statistics.
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.
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