Henrietta Lake

On the LakeGrade scale Henrietta Lake grades a B, with clarity at 14.8 ft and phosphorus readings still being added placing it above the Wisconsin median. 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.

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. The lake's maximum depth is not yet documented in state morphometric records — context for its physical structure remains limited. At 15 acres, Henrietta Lake sits below the Wisconsin median: a small water where shoreline activity has an outsized effect on water quality. Henrietta Lake ranks 39 of 48 in Waukesha County — at the lower end of the locally monitored distribution.

Eurasian watermilfoil has been documented at Henrietta Lake, requiring shoreline management to keep dense mats from crowding native vegetation. The fishery is bass-led, with 3 documented species across the lake's records. A documented public access point at Henrietta Lake 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.