Rush Lake

On the LakeGrade scale Rush Lake grades a B, with clarity at 10.7 ft and 26 µg/L of phosphorus placing it above the Wisconsin median. The three sub-grades — clarity, phosphorus, and chlorophyll-a — track close together, so no single parameter is dragging the average.

The lake sits in the mesotrophic zone — the band where most well-managed Wisconsin lakes fall. The lake's maximum depth is not yet documented in state morphometric records — context for its physical structure remains limited. Rush Lake covers 2,729 acres alongside partial shoreline records, large enough that conditions can vary meaningfully between bays. Among the 5 graded lakes in Winnebago County, Rush Lake ranks 1 — in the top quartile locally.

An invasive species record — Curly-Leaf Pondweed — has been logged at Rush Lake; Wisconsin DNR maintains the official infested-waters list. 2 fish species are documented at Rush Lake, a mixed warm-water community typical for Wisconsin lakes of this size. Public access is available — the lake is on the Wisconsin DNR public-access list. Monitoring depth is thin here: the LakeGrade rubric is applied to a small number of sample years, and the grade will be revised as more data accumulates.