Harmful Algal Bloom (HAB) Event Information
Bloom Code 25-3406-B1
Where
Water Body Cayuga Lake
Latitude and Longitude 42.7841, -76.7164
Segment Lakeshore Segment Northeast 5: Frontenac Park to Ellis Point
County Cayuga
Extent Widespread
When
Bloom Reported September 12, 2025 01:20 PM
Bloom Sampled September 12, 2025 01:20 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: The HAB was in my zone as well as north or Ellis Point at least 3/4 mile. Was not a solid mass, but collecting on the downwind side of any shoreline contours or obstructions. Flat calm at time of siting. HAB was in close to shore, but streaks were further out. No rain for days. The wind picked up out of the NW and it all dispersed within a couple of hours.

Weather
Weather
Wind speed
Wind direction
Water Temp
Air Temp