Milwaukee Harbor South Half Lake

Milwaukee Harbor South Half Lake earns a D — measurements through 2025 show persistent nutrient pressure that limits clarity through the summer. Chlorophyll-a is the limiting factor: even when clarity looks acceptable, the algal community drives the grade down.

At a TSI of 56, Milwaukee Harbor South Half Lake reads as eutrophic — nutrient-rich enough that summer algal growth and reduced clarity are expected, not unusual. The lake's maximum depth is not yet documented in state morphometric records — context for its physical structure remains limited. The lake's surface area is not consistently recorded across state datasets — physical context remains partial. Milwaukee Harbor South Half Lake ranks 13 of 15 in Milwaukee County — at the lower end of the locally monitored distribution.

Milwaukee Harbor South Half Lake has no invasive species recorded in Wisconsin state databases as of 2025, though prevention practices still apply at all access points. The state fisheries records do not list documented species for Milwaukee Harbor South Half 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.