Kasbaum Lake

On the LakeGrade rubric, Kasbaum Lake pulls an A: clarity at 32.0 ft and 22 µg/L of phosphorus put it in the top bracket for Wisconsin. The three sub-grades — clarity, phosphorus, and chlorophyll-a — track close together, so no single parameter is dragging the average.

A TSI value of 38 puts Kasbaum Lake in the oligotrophic range, where biological productivity stays low and the water column remains clear. At 68 ft of maximum depth, Kasbaum Lake stratifies reliably through the summer — the hypolimnion stays cooler and clearer than the surface layer suggests. Kasbaum Lake is small — 6 acres alongside partial shoreline records — which makes it sensitive to even modest changes in watershed runoff or recreational pressure. Kasbaum Lake ranks 9 of 18 in Manitowoc County — solidly in the upper half of the local distribution.

No invasive species are currently listed at Kasbaum Lake — the lake remains off the Wisconsin infested-waters roster. The fishery is bass-led, with 2 documented species across the lake's records. 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.