North White Ash Lake

North White Ash Lake sits at a C on the grading scale — not impaired, not pristine, with summer measurements that vary year to year. The three sub-grades — clarity, phosphorus, and chlorophyll-a — track close together, so no single parameter is dragging the average.

Eutrophic conditions are the baseline here: clarity drops noticeably in late summer, and dissolved oxygen near the bottom can become a concern. At only 9 ft deep, North White Ash Lake is shallow — wind keeps the water column mixed and sediment resuspension drives phosphorus levels harder to manage. At 116 acres, North White Ash Lake fits the Wisconsin median for monitored lakes, with partial shoreline records. North White Ash Lake sits at rank 50 of 74 in Polk County, in the lower half of the local distribution.

An invasive species record — Banded Mystery Snail — has been logged at North White Ash Lake; Wisconsin DNR maintains the official infested-waters list. The fishery is bass-led, with 3 documented species across the lake's records. A documented public access point at North White Ash 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.