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LakeQuality

Andrusia Lake vs Little Turtle Lake

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

Andrusia Lake has a higher water quality grade (A, Excellent) than Little Turtle Lake (B, Good). Both are in Beltrami County, Minnesota.

Both Andrusia Lake and Little Turtle 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 — Andrusia Lake (A) versus Little Turtle 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.

A

Andrusia Lake

Beltrami County, Minnesota

Crystal clear, you can see 15.5 ft down.

B

Little Turtle Lake

Beltrami County, Minnesota

Moderate clarity, visible to about 7 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.

MetricAndrusia LakeLittle Turtle Lake
Overall GradeA (Excellent)B (Good)
Water Clarity15.5 ft7 ft
Phosphorus14 µg/L23 µg/L
Chlorophyll-a (Algae)No dataNo data
Maximum Depth60 ft25 ft
Surface Area1.6K acres468.5 acres
Public AccessYesNo
Fish Species11
Trophic Stateoligotrophicmesotrophic

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

Verdict

Andrusia Lake wins on overall water quality with a Grade A versus Little Turtle Lake's Grade B. Water clarity: 15.5 ft vs 7 ft. For fishing diversity, Andrusia Lake also leads with 1 species.