Brekke Lake

On the LakeGrade rubric, Brekke Lake pulls an A: clarity readings still being added and 11 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.

The lake's low TSI puts it in oligotrophic territory — the cleanest of the four trophic classes, but also the most vulnerable to nutrient-driven shifts. Brekke Lake reaches 25 ft at its deepest point — typical for Wisconsin mid-sized lakes, with seasonal stratification but limited cold-water refuge. At 46 acres, Brekke Lake sits below the Wisconsin median: a small water where shoreline activity has an outsized effect on water quality. Brekke Lake ranks 23 of 27 in Waupaca County — at the lower end of the locally monitored distribution.

Eurasian watermilfoil has been documented at Brekke Lake, requiring shoreline management to keep dense mats from crowding native vegetation. Walleye are documented at Brekke Lake, one of 4 fish species on record for the lake. A documented public access point at Brekke Lake makes the lake usable for shore fishing, paddle craft, and trailered boats. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.