Big Hills Lake

Big Hills Lake comes in at a B on the grading rubric — a respectable showing for a Wisconsin lake of its size and depth. Secchi readings are the weakest of the three parameters, suggesting suspended sediment or algal biomass dominates the optical signal.

A TSI near 46 places Big Hills Lake in the mesotrophic band — moderate productivity, with seasonal swings between clearer spring water and richer late-summer conditions. 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. Within the 32 graded lakes of Waushara County, Big Hills Lake sits at rank 26, near the bottom of the county list.

No invasive species are currently listed at Big Hills Lake — the lake remains off the Wisconsin infested-waters roster. The state fisheries records do not list documented species for Big Hills 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.