Harmful Algal Bloom (HAB) Event Information
Bloom Code 25-3420-B1
Where
Water Body Cayuga Lake
Latitude and Longitude 42.536159, -76.544295
Segment Lakeshore Segment Southeast 4: Myers Park
County Tompkins
Extent Small Localized (few properties)
When
Bloom Reported July 11, 2025 08:20 AM
Bloom Sampled July 11, 2025 08:20 AM
Microscopic Examination July 13, 2025
What
Bloom Genera [1]
Microscopy Present Dominant
Dolichospermum

Bloom Chemistry
Total Microcystin and Nodularins (EPA 546) [2] 0.43 ug/L
Total Microcystin and Nodularins (EPA 546) [2] 0.43 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
Bloom Description

Volunteer reports: Thick, HAB and debris in corners of marina, lighter HAB near jet ski docks, clear near most of the slips. Mostly still water around docks in marina, thick with HAB, weeds, grass cuttings, twigs

Weather
Weather Sunny
Wind speed
Wind direction
Water Temp
Air Temp