New York /

Lake Ronkonkoma

Lake in New York · 226 acres · near Lake Ronkonkoma

Lake Ronkonkoma has 1 boat ramp listed as public.

Invasive species

NYS DEC records brittle naiad (latest 2012), Eurasian watermilfoil (latest 2012) and hydrilla (latest 2009) in this water. Clean, drain and dry your boat, trailer and gear before you leave, and do not move water, plants or live bait to another water.

NYS DEC · checked October 18, 2026

Past algal blooms

Harmful algal blooms reported on this water (state reports compiled by U.S. EPA): 2016, 2018 to 2021 and 2026.

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

Launches

Wikidata: Q6477543