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B

Chester Lake

Cook County, MinnesotaLimited DataMesotrophic

Chester Lake comes in at a B on the grading rubric — a respectable showing for a Minnesota lake of its size and depth.

A TSI near 41 places Chester Lake in the mesotrophic band — moderate productivity, with seasonal swings between clearer spring water and richer late-summer conditions. A maximum depth of 35 ft puts Chester Lake in the middle of Minnesota's depth distribution. At 52 acres, Chester Lake sits below the Minnesota median: a small water where shoreline activity has an outsized effect on water quality. Among the 128 graded lakes in Cook County, Chester Lake sits at rank 53, above the county median.

Chester Lake has no invasive species recorded in Minnesota state databases as of 2023, though prevention practices still apply at all access points. The lake's fish records list 3 species — a varied community without one dominant gamefish. A documented public access point at Chester Lake makes the lake usable for shore fishing, paddle craft, and trailered boats. 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 2023-08-23. Grade methodology: LakeGrade methodology.

Reviewed by LakeQuality Editorial Team · Updated

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Swimming Safety

Good for swimming, clear water with low algae levels

Water Quality Grade: B, Good

Good clarity, visible to about 11.9 ft. Trophic State Index: 41.

MetricValueGrade
Water Clarity (Secchi Depth)11.9 ftB
PhosphorusNo data
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)41Mesotrophic

Moderate nutrients, good water quality

Lake Details

CharacteristicValue
Maximum Depth35 ft
Average Depth14.2 ft
Surface Area51.97 acres
Shoreline Length1.5 mi
Littoral Zone56%
Public AccessYes

Fish Species

brown trout,rainbow smelt,white sucker

Click a species to see all Minnesota and Wisconsin lakes where it is found.

→ Best fishing times for Chester Lake (14-day solunar calendar)

→ Is it safe to eat fish from Chester Lake? (mercury & PFAS guide)

Chester Lake fishing regulations (limits, seasons, special rules)

Water Quality Trend: Declining

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

MetricTrendChange/YearYears
Water Clarity Declining-0.625 m/yr2

Location

Loading map…

County Ranking

Ranked #53 of 128 lakes in Cook County

Cleaner Lakes Within 30 Miles

Chester Lake holds Grade B. 2 nearby lakes hold higher grades.

Nearby Lakes in Cook County

DNR Fisheries Survey Summary

10 surveys on file from MN DNR Fisheries. Most recent: 2024-09-23 (Standard Survey).

Top Species by Catch Rate

SpeciesAvg CPUEAvg Weight
RBS35.770.03 lb
Fathead Minnow28.45
BNS8.00
CNM5.72
White Sucker5.630.9 lb
Brown Trout3.241.59 lb

CPUE = catch per unit effort, averaged across surveys (excludes juvenile shoreline seining). Higher CPUE = more abundant in standardized sampling.

Length Distributions

Number of fish caught at each inch class in the most recent survey that recorded lengths. Red dashed line marks an approximate trophy threshold for that species.

RBS

109 fish · 25 in · 2024-09-23
864302345

Fathead Minnow

2 fish · 12 in · 1997-09-29
1012

White Sucker

64 fish · 616 in · 2024-09-23
1470678910111213141516

Brown Trout

17 fish · 1117 in · 2024-09-23
420trophy 1811121314151617

From the 2024-09-23 survey

Chester Lake is a small, 52-acre lake with a maximum depth of 35 ft and is located approximately 11 miles northwest of Hovland. Chester Lake lies within the Lake Superior North watershed, draining to Lake Superior via Portage Brook and the Pigeon River. There is a small carry-in access located on the north end of the…

Source: MN DNR LakeFinder Fisheries Lake Survey

DNR Reports & Resources

Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Chester Lake. 4 reports on file.

EPA Impairment Status

Chester Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).

Causes of impairment

Mercury

A Total Maximum Daily Load (TMDL) plan has been approved.

Source: EPA ATTAINS assessment unit MN16-0033-00 · Official waterbody report

Data Sources

Water quality data from the EPA Water Quality Portal

Impairment status from EPA ATTAINS 303(d) database

Grading methodology based on Metropolitan Council standards

Lake details from Minnesota DNR LakeFinder

Most recent sample: 2023-08-23

Monitoring stations: 1