Harmful Algal Bloom (HAB) Event Information
Bloom Code 25-3431-B3
Where
Water Body Cayuga Lake
Latitude and Longitude 42.48071, -76.53262
Segment Lakeshore Segment Southwest 2: Cass Park to Glenwood Point
County Tompkins
Extent Small Localized (few properties)
When
Bloom Reported September 26, 2025 01:05 PM
Bloom Sampled September 29, 2025 01:05 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 reported: The lake was very calm, but 10 minutes later there was a strong wind from the north and the bloom dissipated.

Weather
Weather Sunny
Wind speed
Wind direction
Water Temp
Air Temp