Harmful Algal Bloom (HAB) Event Information
Bloom Code 25-3474-B3
Where
Water Body Cayuga Lake
Latitude and Longitude 42.8438, -76.6962
Segment Lakeshore Segment Northeast 4: Frontenac Park
County Cayuga
Extent Large Localized
When
Bloom Reported September 10, 2025 04:30 PM
Bloom Sampled September 10, 2025 04:59 PM
Microscopic Examination
What
Bloom Genera [1]
Microscopy Present Dominant

Bloom Chemistry
Total Chlorophyll a 924.0 ug/L
Total Microcystin and Nodularins (EPA 546) [2] 613.0 ug/L
[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
Weather
Weather
Wind speed
Wind direction
Water Temp
Air Temp