Lake Wisconsin Columbia Co.

On the LakeGrade rubric Lake Wisconsin Columbia Co. fails the cutoffs — a TSI of 66 and persistent algal pressure put it in the bottom tier. The three sub-grades — clarity, phosphorus, and chlorophyll-a — track close together, so no single parameter is dragging the average.

At a TSI of 66, Lake Wisconsin Columbia Co. reads as eutrophic — nutrient-rich enough that summer algal growth and reduced clarity are expected, not unusual. 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. Within the 10 graded lakes of Columbia County, Lake Wisconsin Columbia Co. sits at rank 10, near the bottom of the county list.

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.