Nepco Lake

Nepco Lake earns an A — water clarity, phosphorus, and chlorophyll-a all rate among the best monitored waters in Wood County. Clarity, phosphorus, and chlorophyll-a all rate similarly, so there is no obvious single lever to pull on watershed management.

The lake's low TSI puts it in oligotrophic territory — the cleanest of the four trophic classes, but also the most vulnerable to nutrient-driven shifts. A maximum depth of 29 ft puts Nepco Lake in the middle of Wisconsin's depth distribution. Nepco Lake covers 496 acres alongside partial shoreline records — a mid-sized water that supports a working fishery without being so large that conditions diverge between basins. Nepco Lake ranks 1 of 4 in Wood County, putting it in the upper tier of locally monitored lakes.

Zebra mussel presence at Nepco Lake means the lake's clarity numbers carry an asterisk — filtered water is not the same as nutrient-poor water. The fishery includes walleye alongside the lake's other 6 documented species — a notable draw for Wisconsin anglers. A documented public access point at Nepco 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.