Mcginnis Lake

Mcginnis Lake sits at a C on the grading scale — not impaired, not pristine, with summer measurements that vary year to year. Secchi readings are the weakest of the scored parameters, suggesting suspended sediment or algal biomass dominates the optical signal.

Mesotrophic conditions dominate at Mcginnis Lake: enough nutrients for a healthy fishery, not so much that algal blooms become a chronic problem. A maximum depth of 28 ft puts Mcginnis Lake in the middle of Wisconsin's depth distribution. Mcginnis Lake is small — 27 acres alongside partial shoreline records — which makes it sensitive to even modest changes in watershed runoff or recreational pressure. Within Adams County's 19 graded lakes, Mcginnis Lake ranks 13 — below the local median, though not at the bottom.

Mcginnis Lake carries an invasive watermilfoil record — boat-launch decontamination and shoreline care matter more here than at uninfested lakes. Bass fishing is part of the appeal: the species list runs to 2, anchored by largemouth and/or smallmouth bass. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.