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C

Unnamed Lake

Grant County, MinnesotaLimited DataMesotrophic

The LakeGrade rubric puts Unnamed Lake at a C: clarity at 6.7 ft, phosphorus readings still being added, and a TSI of 50 signal an intermediate trophic state.

The lake sits in the mesotrophic zone — the band where most well-managed Minnesota lakes fall. 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. Within Grant County's 10 graded waters, Unnamed Lake sits at rank 2, near the top of the local distribution.

No invasive species are currently listed at Unnamed Lake — the lake remains off the Minnesota infested-waters roster. 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 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 2022-07-26. Grade methodology: LakeGrade methodology.

Reviewed by LakeQuality Editorial Team · Updated

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Swimming Safety

Generally safe for swimming, moderate water quality

Water Quality Grade: C, Fair

Moderate clarity, visible to about 6.7 ft. Trophic State Index: 50.

MetricValueGrade
Water Clarity (Secchi Depth)6.7 ftC
PhosphorusNo data
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)50Mesotrophic

Moderate nutrients, good water quality

Location

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County Ranking

Ranked #2 of 10 lakes in Grant County

Cleaner Lakes Within 30 Miles

Unnamed Lake holds Grade C. 4 nearby lakes hold higher grades.

Nearby Lakes in Grant County

Data Sources

Water quality data from the EPA Water Quality Portal

Grading methodology based on Metropolitan Council standards

Most recent sample: 2022-07-26

Monitoring stations: 1