Omer Lake

Omer Lake carries a solid B grade — strong on most parameters, with measurements that hold up well across the summer season. Of the three parameters, phosphorus is the worst — at 67 µg/L of phosphorus, it keeps the lake susceptible to algal blooms in warm years.

Eutrophic conditions are the baseline here: clarity drops noticeably in late summer, and dissolved oxygen near the bottom can become a concern. The lake's maximum depth is not yet documented in state morphometric records — context for its physical structure remains limited. Omer Lake is small — 19 acres alongside partial shoreline records — which makes it sensitive to even modest changes in watershed runoff or recreational pressure. Within the 77 graded lakes of Polk County, Omer Lake sits at rank 61, near the bottom of the county list.

Omer Lake has no invasive species recorded in Wisconsin state databases as of 2024, though prevention practices still apply at all access points. The state fisheries records do not list documented species for Omer 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.