Blue-green algae

County health officials are warning residents to stay out of the water of Riverwoods Pond in Riverside, where the sixth blue-green algae bloom on the East End this month was reported.

Analysis of surface water samples performed by SUNY Stony Brook has confirmed the presence of  cyanobacteria blooms, more commonly known as blue-green algae, in Marratooka Lake in Mattituck, the Suffolk County Department of Health Services announced Monday.

Informed, wise and strong action is needed to reverse the trend of harmful algal blooms in Long Island waterways.

Blue-green algae has been found in South Merritts Pond in Riverhead, according to the Suffolk County Health Department, which on Aug. 31 reported blooms in several freshwater ponds across the county. Health officials urge residents not to use or swim or wade in these waters and to keep their pets and children away from the area.

Health officials are warning residents to stay out of local waters where blue-green algae has been found. Sampling performed by Stony Brook University scientists has...

County health officials have issued a new warnings about cyanobacteria blooms in Suffolk water bodies after samples disclosed new toxic blooms.