New York
Toxic algae in Franklin County lakes
18 lakes and waterways in Franklin County have harmful algal bloom reports in New York's official data. The most recent entry is for Upper Saint Regis Lake: Upper Saint Regis Lake was on New York's harmful algal bloom list on 23 September 2025, with confirmed bloom status (1 report). Whey Pond, Lake Clear and Lower Saint Regis Lake and 4 more have had blooms in three or more years.
Lakes with bloom history
Newest report first. Each lake has its own page with the full history and what the results mean.
- Upper Saint Regis Lake Confirmed bloom
- Whey Pond Confirmed bloom
- Copperas Pond Confirmed bloom
- Lake Clear Confirmed bloom
- Lower Saint Regis Lake Confirmed bloom
- Spitfire Lake Confirmed bloom
- Meacham Lake Not listed in 2025
- Rollins Pond Not listed in 2025
- Lower Saranac Lake Not listed in 2025
- Upper Saranac Lake Not listed in 2025
- Barnum Pond Not listed in 2025
- Lake Colby Not listed in 2025
- Eagle Pond Not listed in 2025
Other waterbodies with a report
These have one or two reports in a single year, which isn't enough history for a page of their own yet.
- Fish Creek Ponds 2024
- Follensby Clear Pond 2023
- Indian Lake 2023
- Little Wolf Pond 2020
- Rat Pond 2022
Source: New York State Department of Environmental Conservation (DEC), official data, checked 24 October 2026. For today's conditions see the NYHABS map. No report doesn't mean a lake is safe: most water is only tested occasionally.