People frequently see Harmful Algal Blooms (HABs) in New York State lakes in early fall. Although fewer blooms appear as water and air temperatures decrease, HABs may still occur on waterbodies throughout the year.
Visit NYHABS, DEC’s harmful algal bloom notification map to view locations of freshwater HABs in New York State that were reported in the past two weeks. 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.
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, scums, 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.
