Beaver Dam Lake

Beaver Dam Lake grades an F: water clarity, phosphorus, and chlorophyll-a all rate poorly, placing it among the most stressed lakes monitored in Wisconsin. Clarity, phosphorus, and chlorophyll-a all rate similarly, so there is no obvious single lever to pull on watershed management.

The hypereutrophic status — TSI 71 — reflects sustained heavy nutrient loading from the surrounding watershed and frequent algal pressure. The lake's maximum depth is not yet documented in state morphometric records — context for its physical structure remains limited. The lake's surface area is not consistently recorded across state datasets — physical context remains partial. Beaver Dam Lake ranks 3 of 3 in Dodge County — at the lower end of the locally monitored distribution.

No invasive species are currently listed at Beaver Dam Lake — the lake remains off the Wisconsin infested-waters roster. The state fisheries records do not list documented species for Beaver Dam Lake, which usually reflects a lack of formal fisheries survey work rather than an empty lake. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.