Harmful Algal Bloom (HAB) Event Information
Bloom Code 25-3473-B3
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 Small Localized (few properties)
When
Bloom Reported July 10, 2025 03:49 PM
Bloom Sampled July 10, 2025 03:49 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 is at the mouth of Lively Run Creek. Tuesday and Wednesday the zone was part of the widespread outbreak. This morning and early afternoon the creek looked clear. Now there is a 3-4foot patch of blue observed. It is different, as it appears to be on the stones (bottom of the creek bed) as opposed to flowing on top.

Weather
Weather
Wind speed
Wind direction
Water Temp
Air Temp