John'S Lake

John'S Lake comes in at a B on the grading rubric — a respectable showing for a Wisconsin lake of its size and depth. The three sub-grades — clarity, phosphorus, and chlorophyll-a — track close together, so no single parameter is dragging the average.

Mesotrophic conditions dominate at John'S Lake: enough nutrients for a healthy fishery, not so much that algal blooms become a chronic problem. The lake bottoms out at 41 ft — a moderate depth that supports a warm-water fishery without the year-round cold refuge a deeper basin provides. The lake is compact at 71 acres, with partial shoreline records and little volume to buffer nutrient inputs. John'S Lake sits at rank 24 of 32 in Waushara County, in the lower half of the local distribution.

Zebra mussel presence at John'S Lake means the lake's clarity numbers carry an asterisk — filtered water is not the same as nutrient-poor water. The lake's fish records list 3 species — a varied community without one dominant gamefish. Public access is available — the lake is on the Wisconsin DNR public-access list. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.