Friday, May 29, 2026

TOXIC ALGAE IN PROSPECT PARK LAKE

 
Harmful algal blooms (HABs) that are potentially toxic to people and animals are currently "large localized" in Prospect Park Lake, not yet "widespread or lakewide."
 
The New York State Department of Environmental Conservation says 

Visit NYHABS to view locations of freshwater HABs in New York State that were reported in the past week. Click on a dot for more information, including the date it was reported, the waterbody name, and pictures. Click on the arrow at the bottom of the screen to view a list of reported HABs. Instructions on how to use NYHABS are on DEC's HABs notification webpage.

When it comes to HABs, DEC encourages New Yorkers to: 

  • Know it: HABs vary in appearance from scattered green dots in the water, to long, linear green streaks, pea soup, or spilled green paint, to blue-green or white coloration.
  • Avoid it: People, pets, and livestock should avoid contact with floating mats, scum, and discolored water.
  • Report it: Report a suspected HAB using the NYHABs online reporting form. Report health concerns related to HABs to the Department of Health at harmfulalgae@health.ny.gov, or contact your local health department.
Report a HAB


Most algae blooms are harmless; however, exposure to toxins and other substances from certain HABs can make humans and other mammals, birds, and fish sick.

Avoid contact with all floating mats, scum, and discolored water.

Adults, children, dogs, and other animals should not go into the lake or near the shoreline. 

Anyone who has been in contact with a HAB should rinse thoroughly with soap and water--or with clean water alone, if that's all that's available at the moment.

Anyone who might have been exposed to a bloom and is experiencing any symptoms should get medical help immediately and should also contact the New York City Department of Health (DOH).