Okauchee Lake-Site No. 3-at Okauchee

Okauchee Lake-Site No. 3-at Okauchee earns an A — water clarity, phosphorus, and chlorophyll-a all rate among the best monitored waters in Waukesha County. The three sub-grades — clarity, phosphorus, and chlorophyll-a — track close together, so no single parameter is dragging the average.

A TSI near 45 places Okauchee Lake-Site No. 3-at Okauchee in the mesotrophic band — moderate productivity, with seasonal swings between clearer spring water and richer late-summer conditions. Okauchee Lake-Site No. 3-at Okauchee is unusually deep for Wisconsin at 90 ft, which buffers the lake against summer warming and helps the deep water stay oxygenated. Okauchee Lake-Site No. 3-at Okauchee covers 1,210 acres alongside partial shoreline records, large enough that conditions can vary meaningfully between bays. Okauchee Lake-Site No. 3-at Okauchee sits at rank 30 of 48 in Waukesha County, in the lower half of the local distribution.

Zebra mussel presence at Okauchee Lake-Site No. 3-at Okauchee means the lake's clarity numbers carry an asterisk — filtered water is not the same as nutrient-poor water. The fishery includes walleye alongside the lake's other 6 documented species — a notable draw for Wisconsin anglers. Public access is available — the lake is on the Wisconsin DNR public-access list. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.