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F

Dutchman Lakelanding

Cook County, MinnesotaLimited DataEutrophic

Dutchman Lakelanding earns an F: phosphorus readings still being added and clarity at 2.3 ft signal heavy nutrient loading from the surrounding watershed.

At a TSI of 65, Dutchman Lakelanding reads as eutrophic — nutrient-rich enough that summer algal growth and reduced clarity are expected, not unusual. 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 the 128 graded lakes of Cook County, Dutchman Lakelanding sits at rank 118, near the bottom of the county list.

No invasive species are currently listed at Dutchman Lakelanding — the lake remains off the Minnesota infested-waters roster. The state fisheries records do not list documented species for Dutchman Lakelanding, which usually reflects a lack of formal fisheries survey work rather than an empty lake. Monitoring depth is thin here: the LakeGrade rubric is applied to a small number of sample years, and the grade will be revised as more data accumulates.

Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2021-09-28. Grade methodology: LakeGrade methodology.

Reviewed by LakeQuality Editorial Team · Updated

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Swimming Safety

Avoid swimming, very poor water quality, potential algae toxins

Water Quality Grade: F, Very Poor

Very murky, less than 2.3 ft of visibility. Trophic State Index: 65.

MetricValueGrade
Water Clarity (Secchi Depth)2.3 ftF
PhosphorusNo data
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)65Eutrophic

High nutrients, frequent algae, reduced clarity

Water Quality Trend: Improving

Based on 5 years of monitoring data (2020-2025).

MetricTrendChange/YearYears
Water Clarity Declining-4.195 m/yr4
Phosphorus Improving-3.9 µg/L/yr4
Chlorophyll-a Improving-0.63 µg/L/yr4
See year-by-year chart →

Location

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County Ranking

Ranked #118 of 128 lakes in Cook County

Cleaner Lakes Within 30 Miles

Dutchman Lakelanding holds Grade F. 3 nearby lakes hold higher grades.

Nearby Lakes in Cook County

Data Sources

Water quality data from the EPA Water Quality Portal

Grading methodology based on Metropolitan Council standards

Most recent sample: 2021-09-28

Monitoring stations: 1