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LakeQuality
C

Bassett Lake

St. Louis County, MinnesotaLimited DataMesotrophic

Bassett Lake sits at a C on the grading scale — not impaired, not pristine, with summer measurements that vary year to year. The three sub-grades — clarity, phosphorus, and chlorophyll-a — track close together, so no single parameter is dragging the average.

Mesotrophic conditions dominate at Bassett Lake: enough nutrients for a healthy fishery, not so much that algal blooms become a chronic problem. Bassett Lake reaches 21 ft at its deepest point — typical for Minnesota mid-sized lakes, with seasonal stratification but limited cold-water refuge. At 403 acres, Bassett Lake fits the Minnesota median for monitored lakes, with 5.4 miles of shoreline. Bassett Lake sits at rank 99 of 187 in St. Louis County, in the lower half of the local distribution.

No invasive species are currently listed at Bassett Lake — the lake remains off the Minnesota infested-waters roster. Walleye are documented at Bassett Lake, one of 12 fish species on record for the lake. Public access is available — the lake is on the Minnesota PCA public-access list. Ice-out has been recorded 10 times at Bassett Lake, with a median around May 1. 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 2024-05-29. Grade methodology: LakeGrade methodology.

Swimming Safety

Generally safe for swimming, moderate water quality

Water Quality Grade: C, Fair

Moderate clarity, visible to about 8 ft. Trophic State Index: 47.

MetricValueGrade
Water Clarity (Secchi Depth)8 ftC
PhosphorusNo data
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)47Mesotrophic

Moderate nutrients, good water quality

Lake Details

CharacteristicValue
Maximum Depth21 ft
Average Depth12.9 ft
Surface Area402.59 acres
Shoreline Length5.4 mi
Littoral Zone49%
Public AccessYes

Fish Species

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

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

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

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

Water Quality Trend: Improving

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

MetricTrendChange/YearYears
Water Clarity Improving+0.083 m/yr4

Ice Season

Historical ice data from Minnesota DNR (20 observations).

Typical Ice-Out
May 1
Typical Ice-In
Nov 17

Estimated open water season: 200 days

EarliestLatest
Ice-Out2005-04-15 (2005)2022-05-09 (2022)
Ice-In2003-11-03 (2003)2004-12-07 (2004)

Most recent ice-out: 2025-04-23

Location

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County Ranking

Ranked #99 of 187 lakes in St. Louis County

Nearby Lakes in St. Louis County

DNR Fisheries Survey Summary

15 surveys on file from MN DNR Fisheries. Most recent: 2025-08-21 (Targeted Survey).

Top Species by Catch Rate

SpeciesAvg CPUEAvg Weight
GOS27.540.08 lb
Yellow Perch18.060.17 lb
MTS15.07
Bluegill12.200.27 lb
Walleye10.461.9 lb
Largemouth Bass7.830.87 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.

GOS

1 fish · 66 in · 2006-07-24
106

Yellow Perch

209 fish · 510 in · 2022-07-25
783905678910

Bluegill

134 fish · 38 in · 2022-07-25
42210345678

Walleye

4 fish · 911 in · 2023-10-04
21091011

From the 2025-08-21 survey

A targeted survey of nearshore fish species in Bassett Lake was conducted on August 21st-August 22nd, 2025, by Lake Biological Monitoring and Assessment (LBMA) program staff. Sampling sites were evenly spaced around the lake, and each was sampled by backpack electrofishing, mini-fyke nets, and seining with a 50-foot…

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 Bassett Lake. 4 reports on file.

Data Sources

Water quality data from the EPA Water Quality Portal

Grading methodology based on Metropolitan Council standards

Lake details from Minnesota DNR LakeFinder

Ice data from Minnesota DNR Climate

Most recent sample: 2024-05-29

Monitoring stations: 1