Harmful Algal Bloom (HAB) Event Information
Bloom Code 25-3406-B6
Where
Water Body Cayuga Lake
Latitude and Longitude 42.7855, -76.7165
Segment Lakeshore Segment Northeast 5: Frontenac Park to Ellis Point
County Cayuga
Extent Widespread
When
Bloom Reported October 04, 2025 05:50 PM
Bloom Sampled October 04, 2025 05:50 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: Sunny, warm 75F+ day. Windy in the morning, flat calm in the afternoon. It stretched out into the lake about 100 feet. Hard to tell beyond that from the dock, but it seemed to be mostly near shore.

Weather
Weather Sunny
Wind speed
Wind direction
Water Temp
Air Temp -3.0