Harmful Algal Bloom (HAB) Event Information
Bloom Code 25-3406-B4
Where
Water Body Cayuga Lake
Latitude and Longitude 42.785, -76.716
Segment Lakeshore Segment Northeast 5: Frontenac Park to Ellis Point
County Cayuga
Extent Widespread
When
Bloom Reported September 24, 2025 06:15 PM
Bloom Sampled September 24, 2025 06:15 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 Reports: HAB extends northward of Ellis Point. Cloudy, flat calm for most of the day. Not hot, mid 70s. Lately it seems like there's a HAB if there isn't any wind. The HAB will come and go within a day or lasts for days on and off.

Weather
Weather
Wind speed
Wind direction
Water Temp
Air Temp