Harmful Algal Bloom (HAB) Event Information
Bloom Code 25-3458-B8
Where
Water Body Cayuga Lake
Latitude and Longitude 42.9254, -76.7287
Segment Lakeshore Segment Northeast 1: Northern Marshes to Harris Park
County Cayuga
Extent Large Localized
When
Bloom Reported September 23, 2025 03:05 PM
Bloom Sampled September 23, 2025 03:05 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: 74F, cloudy and calm (3 mph wind from the NE). More than a half inch of rainfall last night and early this morning. The water has been extremely clear in preceding weeks with very little rainfall.

Weather
Weather
Wind speed
Wind direction
Water Temp
Air Temp