New York
Toxic algae in Steuben County lakes
7 lakes and waterways in Steuben County have harmful algal bloom reports in New York's official data. The most recent entry is for Loon Lake: Loon Lake was not on New York's bloom list in 2025. It was last listed in 2024, with confirmed bloom status. Loon Lake, Tanglewood Lake and Goodhue Lake and 2 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.
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.
- Lake Demons 2023
- Mud Lake 2012
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.