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LakeQuality
A

Bass Lake

Becker County, MinnesotaMesotrophic

On the LakeGrade rubric, Bass Lake pulls an A: clarity at 11.2 ft and 12 µg/L of phosphorus put it in the top bracket for Minnesota. Sub-grades cluster within a single letter of each other, which usually means the lake is in stable trophic balance rather than fighting one specific stressor.

A TSI near 41 places Bass Lake in the mesotrophic band — moderate productivity, with seasonal swings between clearer spring water and richer late-summer conditions. The lake's 50 ft maximum depth is in the upper tier for Minnesota — deep enough for cold-water fish to find refuge in summer. The lake's 126 acres and 3.2 miles of shoreline put it in the mid-range bucket — large enough for varied use, small enough that watershed inputs reach the whole basin. Within Becker County's 93 graded waters, Bass Lake sits at rank 19, near the top of the local distribution.

No invasive species are currently listed at Bass Lake — the lake remains off the Minnesota infested-waters roster. The state fisheries records do not list documented species for Bass Lake, which usually reflects a lack of formal fisheries survey work rather than an empty lake. Public access is available — the lake is on the Minnesota PCA public-access list. 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 2025-09-10. Grade methodology: LakeGrade methodology.

Swimming Safety

Excellent for swimming, crystal clear water with minimal algae

Water Quality Grade: A, Excellent

Good clarity, visible to about 11.2 ft. Phosphorus level: 12 µg/L. Trophic State Index: 41.

MetricValueGrade
Water Clarity (Secchi Depth)11.2 ftB
Phosphorus12 µg/LA
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)41Mesotrophic

Moderate nutrients, good water quality

Lake Details

CharacteristicValue
Maximum Depth50 ft
Surface Area126.12 acres
Shoreline Length3.2 mi
Littoral Zone58%
Public AccessYes

Water Quality Trend: Stable

Based on 6 years of monitoring data (2020-2025).

MetricTrendChange/YearYears
Water Clarity Stable-0.057 m/yr6

Location

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County Ranking

Ranked #19 of 93 lakes in Becker County

Nearby Lakes in Becker County

DNR Fisheries Survey Summary

1 survey on file from MN DNR Fisheries. Most recent: 1987-08-10 (Standard Survey).

Top Species by Catch Rate

SpeciesAvg CPUEAvg Weight
Bluegill19.070.12 lb
Yellow Bass11.560.35 lb
Hybrid Sunfish7.630.18 lb
Northern Pike4.881.07 lb
Pumpkinseed3.940.11 lb
Yellow Perch2.810.16 lb

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

From the 1987-08-10 survey

BLUEGILL, NORTHERN PIKE AND LARGEMOUTH BASS NUMBERS ARE ALL ABOVE STATE AND LOCAL MEDIANS. YELLOW BULLHEAD NUMBERS ARE OVER TWICE THE STATE AND LOCAL AVERAGES WITH YELLOW PERCH NUMBERS FALLING BELOW BOTH OF THE MEDIANS.

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 Bass Lake. 3 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

Most recent sample: 2025-09-10

Monitoring stations: 2