New York
Toxic algae in Dutchess County lakes
21 lakes and waterways in Dutchess County have harmful algal bloom reports in New York's official data. The most recent entry is for Saw Kill: Saw Kill was on New York's harmful algal bloom list on 24 September 2025, with confirmed bloom status (1 report). Wilcox Park Pond North has 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.
- Beekman Park Lake 2023
- Cold Spring 2021
- Cold Spring Creek 2024
- Ellis Pond 2013
- Furnace Pond 2024
- Lake Oniad 2018
- Little Pond 2020
- Melzingah Reservoir 2021
- Mirror Lake 2025
- Rudd Pond 2022
- Sylvan Lake 2018
- Whaley Lake 2020
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.