Andrew Lake

Andrew Lake sits at a C on the grading scale — not impaired, not pristine, with summer measurements that vary year to year. Clarity, phosphorus, and chlorophyll-a all rate similarly, so there is no obvious single lever to pull on watershed management.

The lake sits in the mesotrophic zone — the band where most well-managed Minnesota lakes fall. A maximum depth of 26 ft puts Andrew Lake in the middle of Minnesota's depth distribution. Andrew Lake covers 759 acres alongside 4.7 miles of shoreline — a mid-sized water that supports a working fishery without being so large that conditions diverge between basins. Andrew Lake ranks 10 of 35 in Kandiyohi County — solidly in the upper half of the local distribution.

Zebra mussels have been documented at Andrew Lake, which alters the filter-feeding balance and can paradoxically increase water clarity while disrupting the food web. The fishery includes walleye alongside the lake's other 16 documented species — a notable draw for Minnesota anglers. Public access is available — the lake is on the Minnesota PCA public-access list. Ice-out has been recorded 8 times at Andrew Lake, with a median around Apr 8. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.