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.
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.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 8 ft | C |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 47 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 21 ft |
| Average Depth | 12.9 ft |
| Surface Area | 402.59 acres |
| Shoreline Length | 5.4 mi |
| Littoral Zone | 49% |
| Public Access | Yes |
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).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.083 m/yr | 4 |
Ice Season
Historical ice data from Minnesota DNR (20 observations).
Estimated open water season: 200 days
| Earliest | Latest | |
|---|---|---|
| Ice-Out | 2005-04-15 (2005) | 2022-05-09 (2022) |
| Ice-In | 2003-11-03 (2003) | 2004-12-07 (2004) |
Most recent ice-out: 2025-04-23
Location
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
More Minnesota Lake Rankings
Other Grade C Lakes in Minnesota
Mesotrophic Lakes in Minnesota
DNR Fisheries Survey Summary
15 surveys on file from MN DNR Fisheries. Most recent: 2025-08-21 (Targeted Survey).
Top Species by Catch Rate
| Species | Avg CPUE | Avg Weight |
|---|---|---|
| GOS | 27.54 | 0.08 lb |
| Yellow Perch | 18.06 | 0.17 lb |
| MTS | 15.07 | — |
| Bluegill | 12.20 | 0.27 lb |
| Walleye | 10.46 | 1.9 lb |
| Largemouth Bass | 7.83 | 0.87 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
Yellow Perch
Bluegill
Walleye
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…
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Bassett Lake. 4 reports on file.
- —Fisheries Lake Survey — BassettFisheries Lake Survey · MN DNR LakeFinder
- —Aquatic Plant Report — Bassett (0984)Aquatic Plant Report · MN DNR LakeFinder
- —Fish Stocking History — BassettFish Stocking History · MN DNR LakeFinder
- —Public Water Access Sites — BassettPublic Water Access Sites · MN DNR LakeFinder
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
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