Harmful Algal Bloom (HAB) Event Information
Bloom Code 25-3400-B1
Where
Water Body Cayuga Lake
Latitude and Longitude 42.79855, -76.742741
Segment Open Water 2: Cayuga Lake Mid-North
County Seneca
Extent Not Reported
When
Bloom Reported July 05, 2025 03:30 PM
Bloom Sampled July 07, 2025 05:39 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

This bloom was observed by community members from their boat in the open water. The area received heavy rainfall on the preceding Thursday, and experienced full sunny skies and 85*F+ days in the days following.

Weather
Weather Sunny
Wind speed
Wind direction
Water Temp
Air Temp