Harmful Algal Bloom (HAB) Event Information
Bloom Code 25-3407-B1
Where
Water Body Cayuga Lake
Latitude and Longitude 42.7495, -76.70212
Segment Lakeshore Segment Northeast 6: Ellis Point to Wells College Boathouse
County Cayuga
Extent Large Localized
When
Bloom Reported October 25, 2025 10:00 AM
Bloom Sampled October 25, 2025 10:00 AM
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

Community member reported: The HAB seems rather wide spread (multiple docks as far as I can walk). We saw one diffuse bloom all summer long and this fall has been so bad (since rains) but this is the worst I have seen in years.

Weather
Weather
Wind speed
Wind direction
Water Temp
Air Temp