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LakeQuality
F

Chevans Lake Y

Cook County, MinnesotaLimited DataEutrophic

Chevans Lake Y grades an F: water clarity, phosphorus, and chlorophyll-a all rate poorly, placing it among the most stressed lakes monitored in Minnesota. Sub-grades cluster within a single letter of each other, which usually means the lake is in stable trophic balance rather than fighting one specific stressor.

At a TSI of 68, Chevans Lake Y 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, Chevans Lake Y sits at rank 110, near the bottom of the county list.

Chevans Lake Y 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 Chevans Lake Y, 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 2021-10-05. Grade methodology: LakeGrade methodology.

Swimming Safety

Avoid swimming, very poor water quality, potential algae toxins

Water Quality Grade: F, Very Poor

Very murky, less than 1.9 ft of visibility. Trophic State Index: 68.

MetricValueGrade
Water Clarity (Secchi Depth)1.9 ftF
PhosphorusNo data
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)68Eutrophic

High nutrients, frequent algae, reduced clarity

Water Quality Trend: Stable

Based on 2 years of monitoring data (2020-2025).

MetricTrendChange/YearYears
Water Clarity Stable0 m/yr2

Location

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County Ranking

Ranked #110 of 128 lakes in Cook County

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: 2021-10-05

Monitoring stations: 1