Loon Lake

Loon 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 Loon Lake: enough nutrients for a healthy fishery, not so much that algal blooms become a chronic problem. A maximum depth of just 9 ft means sediment-bound phosphorus releases back into the water column whenever wind stirs the bottom — a classic shallow-lake dynamic. The lake's 134 acres and partial shoreline records put it in the mid-range bucket — large enough for varied use, small enough that watershed inputs reach the whole basin. Loon Lake ranks 13 of 16 in Chippewa County — at the lower end of the locally monitored distribution.

No invasive species are currently listed at Loon Lake — the lake remains off the Wisconsin infested-waters roster. 2 fish species are documented at Loon Lake, a mixed warm-water community typical for Wisconsin lakes of this size. A documented public access point at Loon Lake makes the lake usable for shore fishing, paddle craft, and trailered boats. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.