Harmful Algal Bloom (HAB) Event Information
Bloom Code 25-3444-B10
Where
Water Body Cayuga Lake
Latitude and Longitude 42.73174, -76.76442
Segment Lakeshore Segment Northwest 1: Sheldrake Point to Deans Cove
County Seneca
Extent Large Localized
When
Bloom Reported October 17, 2025 03:45 PM
Bloom Sampled October 17, 2025 03:45 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: Sparse streaks persist out into the lake (>30 ft from shore), very similar to reports from earlier in the week, may be a persistent HAB that is being occasionally broken up by wind and wave action.

Weather
Weather
Wind speed
Wind direction
Water Temp
Air Temp