Skip to main content
LakeQuality
C

Two Lake

Lake County, MinnesotaLimited DataMesotrophic

Two Lake earns a C — middle-of-the-pack water quality, with one or two parameters dragging the average down from a stronger grade.

A TSI near 46 places Two Lake in the mesotrophic band — moderate productivity, with seasonal swings between clearer spring water and richer late-summer conditions. Two Lake reaches 35 ft at its deepest point — typical for Minnesota mid-sized lakes, with seasonal stratification but limited cold-water refuge. The lake's 516 acres and 16.2 miles of shoreline put it in the mid-range bucket — large enough for varied use, small enough that watershed inputs reach the whole basin. Two Lake ranks 108 of 142 in Lake County — at the lower end of the locally monitored distribution.

Two Lake has no invasive species recorded in Minnesota state databases as of 2024, though prevention practices still apply at all access points. Walleye are documented at Two Lake, one of 8 fish species on record for the lake. No formal public access is documented at Two 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 2024-09-02. Grade methodology: LakeGrade methodology.

Reviewed by LakeQuality Editorial Team · Updated

Track Two 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 8.5 ft. Trophic State Index: 46.

MetricValueGrade
Water Clarity (Secchi Depth)8.5 ftC
PhosphorusNo data
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)46Mesotrophic

Moderate nutrients, good water quality

Lake Details

CharacteristicValue
Maximum Depth35 ft
Surface Area516.11 acres
Shoreline Length16.2 mi
Littoral Zone31%
Public AccessNo

Fish Species

bluegill,cisco species,lake whitefish,northern pike,rock bass,smallmouth bass,walleye,white sucker

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

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

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

Two 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+0.179 m/yr4
See year-by-year chart →

Location

Loading map…

County Ranking

Ranked #108 of 142 lakes in Lake County

Cleaner Lakes Within 30 Miles

Two Lake holds Grade C. One nearby lake has a higher grade.

Nearby Lakes in Lake County

DNR Fisheries Survey Summary

5 surveys on file from MN DNR Fisheries. Most recent: 2025-08-01 (Targeted Survey).

Top Species by Catch Rate

SpeciesAvg CPUEAvg Weight
Tullibee (Cisco)6.030.37 lb
White Sucker5.931.85 lb
Walleye5.921.02 lb
Northern Pike5.152.39 lb
CIS1.110.16 lb
Rock Bass0.890.27 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.

Tullibee (Cisco)

74 fish · 512 in · 1996-06-17
4020056789101112

White Sucker

43 fish · 621 in · 2016-06-06
84068101214161820

Walleye

31 fish · 727 in · 2016-06-06
630trophy 248101214161820222426

Northern Pike

35 fish · 1336 in · 2016-06-06
530trophy 36141618202224262830323436

From the 2025-08-01 survey

Temperature and dissolved oxygen (DO) measurements were collected from the deepest basin in Lake Two on August 1st, 2025, to evaluate the quantity and quality of cold, oxygenated water (i.e., oxythermal habitat) available to Lake Whitefish, the most sensitive coldwater species present in this lake (Cisco, also known…

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 Two Lake. 1 report on file.

EPA Impairment Status

Two 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 MN38-0608-00 · 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

Most recent sample: 2024-09-02

Monitoring stations: 4