Okauchee Lake-Site No. 2-at Okauchee

On the LakeGrade scale Okauchee Lake-Site No. 2-at Okauchee grades a B, with clarity at 5.9 ft and 18 µg/L of phosphorus placing it above the Wisconsin median. Clarity is the limiting factor — phosphorus is reasonable but suspended particles or algal cells keep water transparency below Wisconsin norms.

A TSI near 49 places Okauchee Lake-Site No. 2-at Okauchee in the mesotrophic band — moderate productivity, with seasonal swings between clearer spring water and richer late-summer conditions. Okauchee Lake-Site No. 2-at Okauchee is unusually deep for Wisconsin at 90 ft, which buffers the lake against summer warming and helps the deep water stay oxygenated. At 1,210 acres, Okauchee Lake-Site No. 2-at Okauchee is one of the larger lakes in Waukesha County, with partial shoreline records supporting multiple distinct use patterns. Within the 48 graded lakes of Waukesha County, Okauchee Lake-Site No. 2-at Okauchee sits at rank 41, near the bottom of the county list.

Okauchee Lake-Site No. 2-at Okauchee is on the Wisconsin infested-waters list for zebra mussels — boaters should follow clean-drain-dry protocols when moving gear to or from the lake. The fishery includes walleye alongside the lake's other 6 documented species — a notable draw for Wisconsin anglers. A documented public access point at Okauchee Lake-Site No. 2-at Okauchee makes the lake usable for shore fishing, paddle craft, and trailered boats. 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.