Harmful Algal Bloom (HAB) Event Information
Bloom Code 25-3406-B3
Where
Water Body Cayuga Lake
Latitude and Longitude 42.7855, -76.716546
Segment Lakeshore Segment Northeast 5: Frontenac Park to Ellis Point
County Cayuga
Extent Widespread
When
Bloom Reported September 18, 2025 02:45 PM
Bloom Sampled September 18, 2025 02:45 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: 80F and flat calm, no recent rain. This seems like a sort of continuous HAB that's been coming and going over the past week. Wind breaks it up, but it reforms as soon as the wind drops. The longer the water stays calm, the thicker the bloom.

Weather
Weather Sunny
Wind speed
Wind direction
Water Temp
Air Temp