Organization whose mission is to protect and preserve water quality in Sengekontacket Pond. Membership information, activities and educational information are provided.

Regional land use planning agency of island. Information and resources on managed growth planning.

Nonprofit consortium of Shellfish Departments on Martha's Vineyard which strives to preserve and expand the island's traditional shellfisheries.

A land trust preserving land in all the islands communities. Includes event information as well as maps and trail guides.

A non-profit organization working to protect the islands waterways. Background on projects, news and gift item sales are included.