MVCyano, a coalition of local boards of health and the Great Pond Foundation, has issued “red-grade” cyanobacteria bloom advisories in Chilmark Pond, Tisbury Great Pond, James Pond and a pond at Mink Meadows.

Updates to the state's Title 5 regulations that were originally proposed for the Cape, South Coast and the Islands will now only go into effect on Cape Cod, state officials said this week.

Due to poor water quality, the Martha's Vineyard Land Bank is advising visitors at Great Rock Bight in Chilmark to swim at their own risk.

The popular freshwater swimming hole in West Tisbury reopened Tuesday morning after being closed due to high bacteria counts.

Island ponds are a connection to cultural heritage and a livelihood for fishermen. But housing booms and land-use changes threaten to undo a delicate balance.