Harmful Algal Bloom (HAB) Event Information
Bloom Code 25-3413-B1
Where
Water Body Cayuga Lake
Latitude and Longitude 42.698749, -76.685809
Segment Lakeshore Segment Northeast 10: Long Point State Park to Elmwood Point
County Cayuga
Extent Widespread
When
Bloom Reported October 04, 2025 04:00 PM
Bloom Sampled October 04, 2025 04:00 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

Community Member Reports: The water had been calm and clear all day but around 4 the green started in. We took a boat ride North along Powers, Clearview, and Honoco. The HAB’s were present the whole way.

Weather
Weather
Wind speed
Wind direction
Water Temp
Air Temp