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Bass Lake and North Twin Lake read the same on nutrients and algae. Both are in Mahnomen County, Minnesota.

Reviewed by LakeQuality Editorial Team · Updated

Both Bass Lake and North Twin Lake sit in Minnesota. A same-state comparison strips out the state-level water-quality regime as a variable: any differences in the readings here are about the lakes themselves, not the agencies sampling them. The readings are close: Bass Lake and North Twin Lake sit within a narrow band of each other on phosphorus, chlorophyll-a and clarity. The per-parameter table below shows where the small differences actually live.

With readings 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.

Bass Lake

Mahnomen County, Minnesota

Good clarity, visible to about 13.1 ft.

North Twin Lake

Mahnomen County, Minnesota

Moderate clarity, visible to about 8.5 ft.

Side-by-Side Metrics

MetricBass LakeNorth Twin Lake
Water Clarity13.1 ft Better8.5 ft
Phosphorus10 µg/L Better17 µg/L
Chlorophyll-a (Algae)4.9 µg/L Better5.9 µg/L
Maximum Depth26 ft Better16 ft
Surface Area735 acres966 acres
Public AccessYesNo
Fish Species1314 Better
Trophic Statemesotrophicmesotrophic

A green ✓ marks the better value for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better). Surface area and trophic state carry no tick — a bigger lake is not a better lake.

Verdict

Both lakes earn the same Grade A. The tiebreakers come down to clarity (Bass Lake: 13.1 ft, North Twin Lake: 8.5 ft) and what you want from the lake. Bass Lake has fewer fish species than North Twin Lake.

Source: EPA National Aquatic Resource Surveys, 2026.