Harmful Blue-Green Algae Bloom-related Beach Closure Summary
Regulated bathing beaches continue closing their swimming areas more frequently and for longer periods of time during the beach season (Memorial Day-Labor Day) to ensure that people avoid contact with harmful blue-green algae blooms and their toxins. When a harmful blue-green algae bloom is present at a bathing beach, the swim area must be closed to protect public health, regardless if toxins are present, and remain closed until the water is clear and testing confirms toxin levels are below a level of concern.
2025 Summary Data
| County | # Times Beaches Closed | # Beaches Closed | Waterbodies with Beach Closures | # Lost Beach Days |
|---|---|---|---|---|
| Albany | 1 | 1 | Myosotis Lake | 21 |
| Broome | 4 | 4 | Whitney Point Resevoir, Greenwood Park Lake, Jellystone Campground Pond | 83 |
| Cattaraugus | 3 | 1 | Red House Lake | 19 |
| Cayuga | 5 | 2 | Cayuga Lake, Owasco Lake | 23 |
| Chatauqua | 8 | 2 | Chautauqua Lake | 86 |
| Clinton | 10 | 3 | Lake Champlain | 38 |
| Dutchess | 2 | 2 | Wilcox Park Pond, Mirror Lake | 35 |
| Erie | 1 | 1 | Green Lake | 63 |
| Essex | 5 | 3 | Lake Champlain | 24 |
| Jefferson | 1 | 1 | Hyde Lake | 5 |
| Livingston | 1 | 1 | Conesus Lake | 9 |
| Madison | 1 | 1 | Madison Lake | 9 |
| Oneida | 2 | 2 | Oneida Lake, Delta Lake | 14 |
| Onondaga | 8 | 3 | Cross Lake, Jamesville Reservoir, Oneida Lake | 90 |
| Ontario | 2 | 1 | Honeoye Lake | 48 |
| Orange | 3 | 2 | Beaver Dam Lake, Lake Tiorati | 11 |
| Otsego | 1 | 1 | Gilbert Lake | 22 |
| Putnam | 13 | 11 | Lake Peekskill, Barger Pond, Secor Lake, Oscawana Lake, Lake Tonetta, Lake Carmel | 350 |
| St. Lawrence | 1 | 1 | Black Lake | 42 |
| Saratoga | 1 | 1 | Saratoga Lake | 6 |
| Schuyler | 2 | 2 | Cayuta Lake, Seneca Lake | 24 |
| Seneca | 4 | 2 | Seneca Lake | 33 |
| Tompkins | 5 | 1 | Cayuga Lake | 20 |
| Westchester | 7 | 4 | Lake Mohegan, Lake Purdys, Lake Lincolndale | 185 |
| Yates | 6 | 4 | Keuka Lake | 30 |
