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LakeQuality

Fraser Lake vs Thomas Lake

Water quality, depth, fish species, and recreation comparison.

Fraser Lake and Thomas Lake both received the same overall water quality grade of B (Good). Both are in Lake County, Minnesota.

Both Fraser Lake and Thomas Lake sit in Minnesota. A same-state comparison strips out the state-level water-quality regime as a variable: any grade differences here are about the lakes themselves, not the agencies grading them. These two are within a letter of each other on the rubric — Fraser Lake (B) versus Thomas Lake (B). The deciding factors for a recreational visitor are likely physical (depth, access, fish species) rather than water-quality differences.

With grades this close, the choice between the two lakes turns on non-water-quality factors: depth, fish species, public access, distance from home. The per-lake pages below cover all of those.

B

Fraser Lake

Lake County, Minnesota

Good clarity, visible to about 11 ft.

B

Thomas Lake

Lake County, Minnesota

Good clarity, visible to about 14 ft.

Side-by-Side Metrics

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

MetricFraser LakeThomas Lake
Overall GradeB (Good)B (Good)
Water Clarity11 ft14 ft
PhosphorusNo dataNo data
Chlorophyll-a (Algae)No dataNo data
Maximum Depth105 ft110 ft
Surface Area695.05 acres1.5K acres
Public AccessNoNo
Fish Species00
Trophic Statemesotrophicoligotrophic

Bold value = better for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better).

Verdict

Both lakes earn the same Grade B. The tiebreakers come down to clarity (Fraser Lake: 11 ft, Thomas Lake: 14 ft) and what you want from the lake. Fraser Lake matches its peer on species count.