Groups working to preserve and protect the Great Marsh through land protection, education, research, restoration, and advocacy include:
Essex County Greenbelt Association
The Area of Critical Environmental Concern Program
Massachusetts Office of Coastal Zone Management
Massachusetts Department of Environmental Management
The Parker River National Wildlife Refuge
The Parker River Clean Water Association
Ipswich River Watershed Association
Eight Towns and the Bay Committee
Essex National Heritage Coalition
Jackson Estuarine Lab - University of New Hampshire
Ecosystems Center - Woods Hole Marine Biological Laboratory
Massachusetts Audubon Society's Salt Marsh Science Program
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