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Open Water 3: Cayuga Lake Mid-South

Graph
Bloom Events
Bloom Code Date Water Body County Bloom Extent Bloom Genera [1] Microcystin (ug/L) [2]
1 20-3400-B5 September 15, 2020 Cayuga Lake Tompkins Large Localized: The HAB is in a small area, but affects many properties, along a large segment of the shoreline, or in a specific region of the waterbody. Microcystis 2.1
2 18-3400-B4 August 23, 2018 Cayuga Lake Tompkins Not Reported Dolichospermum 0.15
3 18-3400-B3 July 14, 2018 Cayuga Lake Tompkins Not Reported Dolichospermum 0.15
4 18-3455-B1 July 12, 2018 Cayuga Lake Tompkins Not Reported Dolichospermum 0.15
5 21-3400-B5 September 04, 2021 Cayuga Lake Tompkins Large Localized: The HAB is in a small area, but affects many properties, along a large segment of the shoreline, or in a specific region of the waterbody.
6 23-3416-B2 September 06, 2023 Cayuga Lake Cayuga Large Localized: The HAB is in a small area, but affects many properties, along a large segment of the shoreline, or in a specific region of the waterbody. Microcystis 235.0
7 24-3457-B1 September 17, 2024 Cayuga Lake Cayuga Widespread or Lake-wide: The HAB is as far as you can see, and seems to affect the entire waterbody, or most or all of the shoreline.
8 24-3400-B5 September 20, 2024 Cayuga Lake Seneca Widespread or Lake-wide: The HAB is as far as you can see, and seems to affect the entire waterbody, or most or all of the shoreline. Microcystis 49.7
9 24-3455-B1 August 15, 2024 Cayuga Lake Tompkins Widespread or Lake-wide: The HAB is as far as you can see, and seems to affect the entire waterbody, or most or all of the shoreline. Dolichospermum 0.55
10 25-3400-B2 July 09, 2025 Cayuga Lake Seneca Widespread or Lake-wide: The HAB is as far as you can see, and seems to affect the entire waterbody, or most or all of the shoreline.
11 25-3455-B1 July 08, 2025 Cayuga Lake Tompkins Widespread or Lake-wide: The HAB is as far as you can see, and seems to affect the entire waterbody, or most or all of the shoreline.
12 23-3443-B2 June 29, 2023 Cayuga Lake Seneca Not Reported Dolichospermum 0.15
13 25-3400-B22 October 27, 2025 Cayuga Lake Cayuga Widespread or Lake-wide: The HAB is as far as you can see, and seems to affect the entire waterbody, or most or all of the shoreline.
[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] Total Microcystins and Nodularins (EPA 546)