Chilton Millpond

Chilton Millpond earns an F: 288 µg/L of phosphorus and clarity at 2.9 ft signal heavy nutrient loading from the surrounding watershed. The two scored sub-grades — clarity and phosphorus — track close together, so neither one is dragging the average down.

A TSI above 70 puts Chilton Millpond in hypereutrophic territory: visible blooms are common, and clarity rarely climbs even in early summer. At only 7 ft deep, Chilton Millpond is shallow — wind keeps the water column mixed and sediment resuspension drives phosphorus levels harder to manage. The lake is compact at 11 acres, with partial shoreline records and little volume to buffer nutrient inputs. Within the 2 graded lakes of Calumet County, Chilton Millpond sits at rank 2, near the bottom of the county list.

No invasive species are currently listed at Chilton Millpond — the lake remains off the Wisconsin infested-waters roster. The fishery is bass-led, with 5 documented species across the lake's records. 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.