Harmful algal blooms reported on Hudson River

ALBANY, N.Y. (NEWS10) — Environmental experts are currently working to monitor the Hudson River after several confirmed harmful algal blooms (HABs). The New York State Department of Environmental Conservation (DEC) has advised the public to be on the lookout while near the water.

According to an interactive map by the DEC, numerous HABs were reported in the Hudson River in August and September, with patches beginning in Hudson and stretching southward through Ulster, Dutchess and Orange counties. Riverkeeper, a non-profit organization dedicated to protecting and restoring the waterbody, noted that an “unprecedented” bloom also appears to be located in the river’s estuary near Kingston.

“Based on observations to date, this appears to be the most extensive HAB in the estuary in living memory,” Riverkeeper said. “HAB conditions have been observed mostly in shallow areas from shorelines from the village of Catskill and city of Hudson, south to the town of Esopus and town of Hype Park, with isolated observations at other points in the river.”

Harmful algal blooms in freshwater bodies are caused by high levels of cyanobacteria, also called blue-green algae. Cyanobacteria is typically present in low numbers in most aquatic systems but certain conditions, such as warm temperatures, calm winds and adequate nutrient availability, can cause the bacteria to multiply rapidly and form visible blooms on the surface of the water.

As officials continue to monitor the Hudson River, the public is advised to report any harmful algal blooms they may see to the DEC. HABs can make water look bright green or resemble pea soup, as seen below and on the DEC website.

Additionally, the public should check the DEC harmful algal bloom tracker before going out onto a body of water to lower the risk of exposure. People, pets and livestock should avoid touching water that is discolored or has algal scums on the surface.