Harmful Algal Bloom (HAB) Event Information
Bloom Code 25-3405-B9
Where
Water Body Cayuga Lake
Latitude and Longitude 42.82107, -76.70795
Segment Lakeshore Segment Northeast 5: Frontenac Park to Ellis Point
County Cayuga
Extent Large Localized
When
Bloom Reported October 17, 2025 04:30 PM
Bloom Sampled October 17, 2025 04:30 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: Calm water, following a day of heavy north wind, cool temps. Last seen on previous Sunday, 10/12. Temps have dropped below 40 daily, high winds previous day. White foam in evidence on Thursday.

Weather
Weather
Wind speed
Wind direction
Water Temp
Air Temp