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LakeQuality
D

Unnamed Lake

Hennepin County, MinnesotaEutrophic

On the scoring rubric Unnamed Lake grades a D: clarity at 2.6 ft and 53 µg/L of phosphorus keep it in the lower bracket for Hennepin County. The lake's weakest score is on Secchi depth — the water looks more turbid than its phosphorus number alone would predict.

A TSI in the eutrophic range signals a lake doing what nutrient-loaded waters do — supporting an active algal community at the cost of clear water. 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 ranks 38 of 95 in Hennepin County — solidly in the upper half of the local distribution.

Unnamed Lake has no invasive species recorded in Minnesota state databases as of 2021, 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. No formal public access is documented at Unnamed 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.

Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2021-09-07. Grade methodology: LakeGrade methodology.

Swimming Safety

Swimming not recommended, poor water quality with high algae risk

Water Quality Grade: D, Poor

Very murky, less than 2.6 ft of visibility. Phosphorus level: 52.8 µg/L. Trophic State Index: 62.

MetricValueGrade
Water Clarity (Secchi Depth)2.6 ftF
Phosphorus52.8 µg/LC
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)62Eutrophic

High nutrients, frequent algae, reduced clarity

Water Quality Trend: Improving

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

MetricTrendChange/YearYears
Water Clarity Improving+0.53 m/yr4
Phosphorus Improving-4.25 µg/L/yr4

Location

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County Ranking

Ranked #38 of 95 lakes in Hennepin County

Nearby Lakes in Hennepin County

Data Sources

Water quality data from the EPA Water Quality Portal

Grading methodology based on Metropolitan Council standards

Most recent sample: 2021-09-07

Monitoring stations: 3