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LakeQuality
F

Unnamed Lake

Hennepin County, MinnesotaLimited DataHypereutrophic

On the LakeGrade rubric Unnamed Lake fails the cutoffs — a TSI of 82 and persistent algal pressure put it in the bottom tier. Clarity, phosphorus, and chlorophyll-a all rate similarly, so there is no obvious single lever to pull on watershed management.

Hypereutrophic conditions mean the lake is operating at the upper end of the productivity scale, with all the bloom risk that implies. 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. Unnamed Lake sits at rank 65 of 95 in Hennepin County, in the lower half of the local distribution.

Unnamed Lake has no invasive species recorded in Minnesota state databases as of 2023, though prevention practices still apply at all access points. The state fisheries records do not list documented species for Unnamed Lake, which usually reflects a lack of formal fisheries survey work rather than an empty lake. The lake lacks a documented public access point, so visitor use is limited. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.

Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2023-09-13. Grade methodology: LakeGrade methodology.

Swimming Safety

Avoid swimming, very poor water quality, potential algae toxins

Water Quality Grade: F, Very Poor

No clarity data. Phosphorus level: 220.5 µg/L. Trophic State Index: 82.

MetricValueGrade
Water Clarity (Secchi Depth)No data
Phosphorus220.5 µg/LF
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)82Hypereutrophic

Very high nutrients, dense algae, poor clarity

Water Quality Trend: Stable

Based on 4 years of monitoring data (2020-2025).

MetricTrendChange/YearYears
Water Clarity Declining-0.45 m/yr2
Phosphorus Improving-48.26 µg/L/yr4

Location

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County Ranking

Ranked #65 of 95 lakes in Hennepin County

Nearby Lakes in Hennepin County

Hypereutrophic Lakes in Minnesota

Data Sources

Water quality data from the EPA Water Quality Portal

Grading methodology based on Metropolitan Council standards

Most recent sample: 2023-09-13

Monitoring stations: 1