Lake Menomin

Lake Menomin sits at a C on the grading scale — not impaired, not pristine, with summer measurements that vary year to year. High phosphorus is the leading drag on the score — likely from upland agriculture, lawn runoff, or in-lake sediment release.

Eutrophic conditions are the baseline here: clarity drops noticeably in late summer, and dissolved oxygen near the bottom can become a concern. A maximum depth of 34 ft puts Lake Menomin in the middle of Wisconsin's depth distribution. With 1,009 acres of surface and partial shoreline records, Lake Menomin is a large water by Wisconsin standards — recreational pressure is spread across a long shoreline. Among the 3 graded lakes in Dunn County, Lake Menomin sits at rank 1, above the county median.

Zebra mussel presence at Lake Menomin means the lake's clarity numbers carry an asterisk — filtered water is not the same as nutrient-poor water. Walleye are documented at Lake Menomin, one of 5 fish species on record for the lake. 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.