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Kek Lake

Lake County, MinnesotaLimited DataOligotrophic

On the LakeGrade rubric, Kek Lake pulls an A: clarity at 19.5 ft and phosphorus readings still being added put it in the top bracket for Minnesota.

The lake's low TSI puts it in oligotrophic territory — the cleanest of the four trophic classes, but also the most vulnerable to nutrient-driven shifts. At 130 ft of maximum depth, Kek Lake stratifies reliably through the summer — the hypolimnion stays cooler and clearer than the surface layer suggests. The lake is compact at 55 acres, with 1.3 miles of shoreline and little volume to buffer nutrient inputs. Among the 142 graded lakes in Lake County, Kek Lake ranks 18 — in the top quartile locally.

Kek Lake has no invasive species recorded in Minnesota state databases as of 2022, though prevention practices still apply at all access points. The state fisheries records do not list documented species for Kek Lake, which usually reflects a lack of formal fisheries survey work rather than an empty lake. No formal public access is documented at Kek 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 2022-06-14. Grade methodology: LakeGrade methodology.

Reviewed by LakeQuality Editorial Team · Updated

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Swimming Safety

Excellent for swimming, crystal clear water with minimal algae

Water Quality Grade: A, Excellent

Crystal clear, you can see 19.5 ft down. Trophic State Index: 34.

MetricValueGrade
Water Clarity (Secchi Depth)19.5 ftA
PhosphorusNo data
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)34Oligotrophic

Low nutrients, clear water, excellent for swimming

Lake Details

CharacteristicValue
Maximum Depth130 ft
Surface Area54.91 acres
Shoreline Length1.3 mi
Littoral Zone11%
Public AccessNo

Water Quality Trend: Declining

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

MetricTrendChange/YearYears
Water Clarity Declining-0.189 m/yr4
See year-by-year chart →

Location

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County Ranking

Ranked #18 of 142 lakes in Lake County

Nearby Lakes in Lake County

DNR Fisheries Survey Summary

1 survey on file from MN DNR Fisheries. Most recent: 1988-09-14 (Standard Survey).

Top Species by Catch Rate

SpeciesAvg CPUEAvg Weight
Lake Trout18.000.98 lb
White Sucker5.000.88 lb
Yellow Perch2.000.1 lb

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

From the 1988-09-14 survey

A deep water gillnet set shows lake trout and white sucker are present in above average numbers. Yellow perch are also present. Lake trout natural reproduction is good; three of eight trout captured were under 12 18 tile lake

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 Kek Lake. 1 report on file.

EPA Impairment Status

Kek Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).

Causes of impairment

Mercury

Source: EPA ATTAINS assessment unit MN38-0226-00 · Official waterbody report · Matched by proximity (0.79 km)

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: 2022-06-14

Monitoring stations: 1