Harmful Algal Bloom (HAB) Event Information
Bloom Code 25-3402-B5
Where
Water Body Cayuga Lake
Latitude and Longitude 42.90442, -76.72391
Segment Lakeshore Segment Northeast 3: Harris Park to Frontenac Park
County Cayuga
Extent Small Localized (few properties)
When
Bloom Reported October 27, 2025 10:50 AM
Bloom Sampled October 27, 2025 10:50 AM
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: Bright sun 42 degrees. Was 28 earlier. So far bloom is confined to shoreline in area with gloating cut weeds and leaves. There is algae present about 20’ off the shore visible from my dock, but not streamers. I was away Fri thru Sun so no prior weather wind info. Slight breeze now and rest of shoreline crystal clear.

Weather
Weather Sunny
Wind speed
Wind direction
Water Temp
Air Temp