Harmful Algal Bloom (HAB) Event Information
Bloom Code 25-3473-B6
Where
Water Body Cayuga Lake
Latitude and Longitude 42.62994, -76.68831
Segment Lakeshore Segment Southwest 9: Frontenac Point to Lively Run
County Seneca
Extent Large Localized
When
Bloom Reported September 16, 2025 12:30 PM
Bloom Sampled September 16, 2025 12:30 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: The bloom is very concentrated at the mouth of Lively Run Creek. It’s less concentrated further down the beach but still noticeable at end of the docks, etc. My whole zone shows HABs.

Weather
Weather Sunny
Wind speed
Wind direction
Water Temp
Air Temp