North White Ash Lake

North White Ash Lake comes in at a B on the grading rubric — a respectable showing for a Wisconsin lake of its size and depth. Phosphorus is the parameter holding the grade back — runoff from the surrounding watershed appears to keep nutrient levels elevated through the summer.

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 48 of 77 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.