Little Twin Lake

On the scoring rubric Little Twin Lake grades a D: clarity at 4.9 ft and phosphorus readings still being added keep it in the lower bracket for Green Lake County. The three sub-grades — clarity, phosphorus, and chlorophyll-a — track close together, so no single parameter is dragging the average.

At a TSI of 54, Little Twin 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. Little Twin Lake ranks 11 of 13 in Green Lake County — at the lower end of the locally monitored distribution.

No invasive species are currently listed at Little Twin Lake — the lake remains off the Wisconsin infested-waters roster. The state fisheries records do not list documented species for Little Twin Lake, which usually reflects a lack of formal fisheries survey work rather than an empty lake. 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.