Mirror Lake

Mirror Lake earns an A — water clarity, phosphorus, and chlorophyll-a all rate among the best monitored waters in Waupaca County. The three sub-grades — clarity, phosphorus, and chlorophyll-a — track close together, so no single parameter is dragging the average.

A TSI near 41 places Mirror Lake in the mesotrophic band — moderate productivity, with seasonal swings between clearer spring water and richer late-summer conditions. The lake bottoms out at 43 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 14 acres, with partial shoreline records and little volume to buffer nutrient inputs. Mirror Lake ranks 5 of 25 in Waupaca County, putting it in the upper tier of locally monitored lakes.

Zebra mussel presence at Mirror Lake means the lake's clarity numbers carry an asterisk — filtered water is not the same as nutrient-poor water. The fishery is bass-led, with 4 documented species across the lake's records. A documented public access point at Mirror 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.