Fraser Lake
Lake County, MinnesotaLimited DataMesotrophic
On the LakeGrade scale Fraser Lake grades a B, with clarity at 11.0 ft and phosphorus readings still being added placing it above the Minnesota median.
A TSI near 43 places Fraser Lake in the mesotrophic band — moderate productivity, with seasonal swings between clearer spring water and richer late-summer conditions. The lake's 105 ft maximum depth is in the upper tier for Minnesota — deep enough for cold-water fish to find refuge in summer. Fraser Lake covers 695 acres alongside 14.6 miles of shoreline — a mid-sized water that supports a working fishery without being so large that conditions diverge between basins. Among the 142 graded lakes in Lake County, Fraser Lake ranks 35 — in the top quartile locally.
No invasive species are currently listed at Fraser Lake — the lake remains off the Minnesota infested-waters roster. The state fisheries records do not list documented species for Fraser Lake, which usually reflects a lack of formal fisheries survey work rather than an empty lake. No formal public access is documented at Fraser Lake — most use is by shoreline residents and their guests. 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 2023-07-07. Grade methodology: LakeGrade methodology.
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Swimming Safety
Good for swimming, clear water with low algae levels
Water Quality Grade: B, Good
Good clarity, visible to about 11 ft. Trophic State Index: 43.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 11 ft | B |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 43 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 105 ft |
| Surface Area | 695.05 acres |
| Shoreline Length | 14.6 mi |
| Littoral Zone | 23% |
| Public Access | No |
Water Quality Trend: ↓ Declining
Based on 4 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.771 m/yr | 4 |
Location
County Ranking
Ranked #35 of 142 lakes in Lake County
Nearby Lakes in Lake County
More Minnesota Lake Rankings
Other Grade B Lakes in Minnesota
Mesotrophic Lakes in Minnesota
Compare Fraser Lake With Nearby Lakes
DNR Fisheries Survey Summary
3 surveys on file from MN DNR Fisheries. Most recent: 2025-08-03 (Targeted Survey).
Top Species by Catch Rate
| Species | Avg CPUE | Avg Weight |
|---|---|---|
| Tullibee (Cisco) | 15.22 | 0.11 lb |
| Lake Trout | 1.44 | 2.01 lb |
| White Sucker | 0.95 | 1.18 lb |
| Northern Pike | 0.25 | 3.5 lb |
| BUB | 0.10 | 1.2 lb |
CPUE = catch per unit effort, averaged across surveys (excludes juvenile shoreline seining). Higher CPUE = more abundant in standardized sampling.
From the 2025-08-03 survey
Temperature and dissolved oxygen measurements were collected from the deepest basin in Fraser Lake on August 3rd, 2025. This was done to evaluate the quantity and quality of cold, oxygenated water (i.e., oxythermal habitat) available to Lake Trout, the most sensitive coldwater species present in this lake (Cisco, also…
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Fraser Lake. 1 report on file.
- —Fisheries Lake Survey — FraserFisheries Lake Survey · MN DNR LakeFinder
EPA Impairment Status
Fraser 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 MN38-0372-00 · 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: 2023-07-07
Monitoring stations: 10