Skip to main content
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.

A TSI near 47 places Bassett Lake in the mesotrophic band — moderate productivity, with seasonal swings between clearer spring water and richer late-summer conditions. The lake bottoms out at 21 ft — a moderate depth that supports a warm-water fishery without the year-round cold refuge a deeper basin provides. Bassett Lake covers 403 acres alongside 5.4 miles of shoreline — a mid-sized water that supports a working fishery without being so large that conditions diverge between basins. Bassett Lake sits at rank 98 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. A documented public access point at Bassett Lake makes the lake usable for shore fishing, paddle craft, and trailered boats. Ice-out has been recorded 10 times at Bassett Lake, with a median around May 1. 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 2024-05-29. Grade methodology: LakeGrade methodology.

Reviewed by LakeQuality Editorial Team · Updated

Track Bassett Lake

Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.

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

black bullhead,black crappie,bluegill,brown bullhead,hybrid sunfish,largemouth bass,northern pike,pumpkinseed,rock bass,walleye,white sucker,yellow perch

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
See year-by-year chart →

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

Loading map…

County Ranking

Ranked #98 of 187 lakes in St. Louis County

Cleaner Lakes Within 30 Miles

Bassett Lake holds Grade C. 4 nearby lakes hold higher grades.

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.

EPA Impairment Status

Bassett 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 MN69-0041-00 · 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

Ice data from Minnesota DNR Climate

Most recent sample: 2024-05-29

Monitoring stations: 1