New York /

Rio Reservoir

Reservoir in New York · 412 acres · near Monticello, Rio

Rio Reservoir has 1 boat ramp and 1 carry-in launch listed as public.

Algal bloom: confirmed

NYS DEC lists a confirmed harmful algal bloom on this water (October 13, 2026). Extent: Large Localized. Avoid contact with discoloured water or scum, and keep pets and children out of it.

NYS DEC · checked October 18, 2026

Past algal blooms

Harmful algal blooms reported on this water (state reports compiled by U.S. EPA): 2021 and 2023.

state reports compiled by U.S. EPA · checked October 18, 2026

Launches