Lake Wisconsin Columbia Co.

The LakeGrade rubric puts Lake Wisconsin Columbia Co. at a C: clarity at 7.3 ft, phosphorus readings still being added, and a TSI of 48 signal an intermediate trophic state. The three sub-grades — clarity, phosphorus, and chlorophyll-a — track close together, so no single parameter is dragging the average.

A TSI near 48 places Lake Wisconsin Columbia Co. in the mesotrophic band — moderate productivity, with seasonal swings between clearer spring water and richer late-summer conditions. A maximum depth of 24 ft puts Lake Wisconsin Columbia Co. in the middle of Wisconsin's depth distribution. Lake Wisconsin Columbia Co. covers 7,197 acres alongside partial shoreline records, large enough that conditions can vary meaningfully between bays. Among the 10 graded lakes in Columbia County, Lake Wisconsin Columbia Co. sits at rank 5, above the county median.

Zebra mussel presence at Lake Wisconsin Columbia Co. means the lake's clarity numbers carry an asterisk — filtered water is not the same as nutrient-poor water. Walleye are documented at Lake Wisconsin Columbia Co., one of 7 fish species on record for the lake. 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.