Iowa /

Union Grove Lake

Reservoir in Iowa · 111 acres · near Garwin

Union Grove Lake has 2 boat ramps listed as public.

Past algal blooms

Harmful algal blooms reported on this water (state reports compiled by U.S. EPA): 2017, 2020, 2021 and 2024.

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

Depth contours in feet from Iowa DNR; deepest point about 12 ft. Lake levels and bottoms change; not for navigation.

Launches