Iverson Lake

Iverson Lake carries a solid B grade — strong on most parameters, with measurements that hold up well across the summer season. Clarity, phosphorus, and chlorophyll-a all rate similarly, so there is no obvious single lever to pull on watershed management.

A TSI value of 39 puts Iverson Lake in the oligotrophic range, where biological productivity stays low and the water column remains clear. A maximum depth of 18 ft puts Iverson Lake in the middle of Minnesota's depth distribution. The lake is compact at 68 acres, with 1.6 miles of shoreline and little volume to buffer nutrient inputs. Within Otter Tail County's 97 graded lakes, Iverson Lake ranks 63 — below the local median, though not at the bottom.

Iverson Lake has no invasive species recorded in Minnesota state databases as of 2022, though prevention practices still apply at all access points. Walleye are documented at Iverson Lake, one of 6 fish species on record for the lake. No formal public access is documented at Iverson Lake — most use is by shoreline residents and their guests. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.