Sandhill Lake

On the LakeGrade scale Sandhill Lake grades a B, with clarity at 7.5 ft and 25 µg/L of phosphorus placing it above the Wisconsin median. Clarity, phosphorus, and chlorophyll-a all rate similarly, so there is no obvious single lever to pull on watershed management.

The lake sits in the mesotrophic zone — the band where most well-managed Wisconsin lakes fall. A maximum depth of just 9 ft means sediment-bound phosphorus releases back into the water column whenever wind stirs the bottom — a classic shallow-lake dynamic. At 5 acres, Sandhill Lake sits below the Wisconsin median: a small water where shoreline activity has an outsized effect on water quality. Sandhill Lake ranks 3 of 9 in Ozaukee County — solidly in the upper half of the local distribution.

Sandhill Lake has no invasive species recorded in Wisconsin state databases as of 2026, though prevention practices still apply at all access points. The state fisheries records do not list documented species for Sandhill Lake, which usually reflects a lack of formal fisheries survey work rather than an empty lake. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.