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LakeQuality

Ml-Nw Lake vs Round Lake

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

Round Lake has a higher water quality grade (A, Excellent) than Ml-Nw Lake (B, Good). Both are in Aitkin County, Minnesota.

Both Ml-Nw Lake and Round 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: Ml-Nw Lake (B) and Round Lake (A) 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

Ml-Nw Lake

Aitkin County, Minnesota

Moderate clarity, visible to about 9.4 ft.

A

Round Lake

Aitkin County, Minnesota

Crystal clear, you can see 15.3 ft down.

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.

MetricMl-Nw LakeRound Lake
Overall GradeB (Good)A (Excellent)
Water Clarity9.4 ft15.3 ft
Phosphorus24 µg/LNo data
Chlorophyll-a (Algae)5.7 µg/LNo data
Maximum Depth42 ft59 ft
Surface Area128.3K acres634.03 acres
Public AccessYesYes
Fish Species11
Trophic Statemesotrophicoligotrophic

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

Verdict

Round Lake wins on overall water quality with a Grade A versus Ml-Nw Lake's Grade B. Water clarity: 15.3 ft vs 9.4 ft. For fishing diversity, Round Lake also leads with 1 species.