New 2023 Map Shows Record Number of Harmful Algal Blooms and Dead Zones Across Long Island
Scientists at Stony Brook University have completed their assessment of water quality in Long Island’s surface waters for 2023 and the news was not good –the announcement was made today at a press conference on the shores of Great South Bay. During the months of April through September, every major bay and estuary across Long Island was afflicted by harmful algal blooms (HABs), oxygen-starved, dead zones, and fish and turtles kills. Excessive delivery of nitrogen from onsite wastewater has been cited as the root cause of these disturbing events.


