Harmful Algal Bloom (HAB) Event Information
Bloom Code 25-3474-B6
Where
Water Body Cayuga Lake
Latitude and Longitude 42.840167, -76.697528
Segment Lakeshore Segment Northeast 4: Frontenac Park
County Cayuga
Extent Widespread
When
Bloom Reported October 04, 2025 05:48 PM
Bloom Sampled October 04, 2025 05:48 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: I was flying my drone and caught this widespread HAB off the shore of Frontenac Park. It appeared to extend as far north as the tributary at the edge of the park, and as far south as just past the marina entrance.

Weather
Weather Sunny
Wind speed
Wind direction
Water Temp
Air Temp