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Health department warns of blue-green algae in East Marion Lake

Sampling performed by SUNY Stony Brook has confirmed cyanobacteria blooms, more commonly known as blue-green algae, in East Marion Lake in East Marion and Hook Pond in Easthampton. Due to these findings, health officials ask residents not to use or swim or wade in these waters and to keep their pets and children away from the area.

Click here for a list of other Suffolk County locations where Cyanobacteria blooms currently exist.

Though blue-green algae are naturally present in lakes and streams in low numbers, they can become abundant, forming blooms in shades of green, blue-green, yellow, brown or red. They may produce floating scums on the surface of the water or may cause the water to take on paint-like appearance.

Contact with waters that appear scummy or discolored should be avoided. If contact does occur, rinse off with clean water immediately. Seek medical attention if any of the following symptoms occur after contact: nausea, vomiting or diarrhea; skin, eye or throat irritation; or allergic reactions or breathing difficulties.

To report a suspected blue-green algae bloom at a body of water that contains a Suffolk County-permitted bathing beach, contact the Suffolk County Department of Health Services’ Office of Ecology at 631-852-5760 between 8:30a.m.-4:30p.m or by email at any time at [email protected]

To report a suspected blue-green algae bloom that is in a body of water that does not contain a Suffolk County permitted bathing beach, contact the Division of Water at New York State Department of Environmental Conservation (DEC): 518-402-8179, between 8:30a.m.-4:30p.m or by email at any time at [email protected]

For a comprehensive list of affected waterbodies, visit the DEC’s Harmful Algal Bloom Notification Page at

For more information about blue-green algae, visit the Suffolk County website.

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Denise Civiletti
Denise is a veteran local reporter and editor, an attorney and former Riverhead Town councilwoman. Her work has been recognized with numerous awards, including a “writer of the year” award from the N.Y. Press Association in 2015. She is a founder, owner and co-publisher of this website.