Townline Lake

Townline Lake earns a C — middle-of-the-pack water quality, with one or two parameters dragging the average down from a stronger grade. The three sub-grades — clarity, phosphorus, and chlorophyll-a — track close together, so no single parameter is dragging the average.

A TSI near 47 places Townline Lake in the mesotrophic band — moderate productivity, with seasonal swings between clearer spring water and richer late-summer conditions. The lake bottoms out at 25 ft — a moderate depth that supports a warm-water fishery without the year-round cold refuge a deeper basin provides. At 61 acres, Townline Lake sits below the Wisconsin median: a small water where shoreline activity has an outsized effect on water quality. Within Oneida County's 134 graded lakes, Townline Lake ranks 68 — below the local median, though not at the bottom.

An invasive species record — Chinese Mystery Snail — has been logged at Townline Lake; Wisconsin DNR maintains the official infested-waters list. The fishery is bass-led, with 2 documented species across the lake's records. A documented public access point at Townline 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.