North Lake West Basin

North Lake West Basin earns a C — middle-of-the-pack water quality, with one or two parameters dragging the average down from a stronger grade. Sub-grades cluster within a single letter of each other, which usually means the lake is in stable trophic balance rather than fighting one specific stressor.

Mesotrophic conditions dominate at North Lake West Basin: enough nutrients for a healthy fishery, not so much that algal blooms become a chronic problem. North Lake West Basin is unusually deep for Wisconsin at 78 ft, which buffers the lake against summer warming and helps the deep water stay oxygenated. North Lake West Basin covers 440 acres alongside partial shoreline records — a mid-sized water that supports a working fishery without being so large that conditions diverge between basins. Within the 45 graded lakes of Waukesha County, North Lake West Basin sits at rank 39, near the bottom of the county list.

Zebra mussel presence at North Lake West Basin 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 5 documented species — a notable draw for Wisconsin anglers. 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.