Harmful Algal Bloom (HAB) Event Information
Bloom Code 25-3473-B8
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 Large Localized
When
Bloom Reported September 26, 2025 02:15 PM
Bloom Sampled September 26, 2025 02:15 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 reported: As usual the mouth of Lively Run creek contains the heaviest outbreak. The creek is not flowing so the water is stagnant. My schedule allowed me time to check three properties south and all showed signs of HABs. Not as concentrated as earlier this week.

Weather
Weather Sunny
Wind speed
Wind direction
Water Temp
Air Temp