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LakeQuality

Lobster Lake vs Mill Lake

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

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

Both Lobster Lake and Mill 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. The grades are close: Lobster Lake (B) and Mill Lake (B) are within one letter of each other on the LakeGrade rubric. The per-parameter sub-grades below will show where the small differences actually live.

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

Lobster Lake

Douglas County, Minnesota

Good clarity, visible to about 13 ft.

B

Mill Lake

Douglas County, Minnesota

Good clarity, visible to about 11 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.

MetricLobster LakeMill Lake
Overall GradeB (Good)B (Good)
Water Clarity13 ft11 ft
Phosphorus20 µg/L24 µg/L
Chlorophyll-a (Algae)No dataNo data
Maximum Depth65 ft40 ft
Surface Area1.3K acres451.12 acres
Public AccessYesYes
Fish Species11
Trophic Statemesotrophicmesotrophic

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 (Lobster Lake: 13 ft, Mill Lake: 11 ft) and what you want from the lake. Lobster Lake matches its peer on species count.