More than half the nitrogen polluting Great Ponds along the south shore is coming from wastewater, a newly released report has found.

Wastewater discharge from urbanization to the north and east of Edgartown Great Pond has been identified as the primary source of increased nitrogen loading in the pond, according to a new study by a Woods Hole scientist.

The Edgartown Great Pond Foundation has worked with the Martha’s Vineyard Commission to produce a first-of-its-kind map of eelgrass in Slough Cove.

Dredging and intensive study are part of a new project for Chilmark Pond, as two foundations have joined forces to develop a science-driven restoration plan for the pond.

With manmade openings at the Edgartown Great Pond a long-established practice, I would like to raise a question about the more recent practice of dredging.

Emily Reddington, former director of science and education at the Great Pond Foundation, has been named executive director of the Edgartown nonprofit.

Biologists and environmental groups are monitoring an invasive jellyfish with a painful sting that has spread into Vineyard waters in recent years.

Torrents of rain from recent storms have caused Vineyard Great Ponds to rise to historic levels, threatening shellfish and surrounding homes.

The overall health of the Edgartown Great Pond has shown significant improvement over the past decade, according to a report released Tuesday from the nonprofit Great Pond Foundation.