Harmful Algal Bloom (HAB) Event Information
Bloom Code 25-3461-B1
Where
Water Body Cayuga Lake
Latitude and Longitude 42.53424, -76.53541
Segment Lakeshore Segment Southeast 5: Myers Park to East Shore Park
County Tompkins
Extent Widespread
When
Bloom Reported September 24, 2025 03:00 PM
Bloom Sampled September 24, 2025 03:00 PM
Microscopic Examination
What
Bloom Genera [1]
Microscopy Present Dominant

Bloom Chemistry
[1] Genera - plural of genus, a category of classification in biology that ranks between the family level and the species level. Because there are many different species of bacteria that are difficult to distinguish, it is more useful to classify bacteria by genus rather than species.
[2] Microcystin
Map of HAB event
Bloom Description

Volunteer Reports: It was along the shoreline from this zone and all along zone 3477. There was concentrated HABs along the shoreline but also streaking throughout the lake, and concentrated green specks throughout layers. I've never seen it this widespread in our area.

Weather
Weather
Wind speed
Wind direction
Water Temp
Air Temp