The Massachusetts Bays National Estuary Program (MassBays) became part of the National Estuary Program (NEP) in 1990, highlighting the region as an “estuary of national significance.” Hosted by the Massachusetts Office of Coastal Zone Management, MassBays is dedicated to protecting, restoring, and enhancing the estuarine resources of Massachusetts and Cape Cod Bays. MassBays facilitates partnerships to promote local, state, and federal action and stewardship, convenes stakeholders on the local and regional level, supports research to provide a scientific basis for management decisions, and works with decision makers to develop solutions to environmental problems. Stretching from the New Hampshire border to the tip of Cape Cod, the 50 coastal communities in the MassBays region are home to over 1.7 million people. Due to its large size and geographic diversity, the MassBays area is divided into five regions. This approach ensures that the program’s activities are tailored to local environmental conditions and are based on community input and regional priorities.


251 Causeway Street, Suite 800
Boston, MA 02114-2136


(617) 626-1204


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