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LakeQuality

How Clean Is Otter Tail Lake?

Otter Tail Lake is among the cleanest lakes in Minnesota. It received a water quality grade of A (Excellent) based on EPA monitoring data. Water clarity (Secchi depth): 12.1 ft. Phosphorus: 16 µg/L. Trophic State Index: 43.

Cleanliness Snapshot

MetricOtter Tail LakeMinnesota avg
Overall GradeAC
Water Clarity (Secchi)12.1 ft
Phosphorus16 µg/L<30 = clean
Trophic State Index43<50 = clean

How does Otter Tail Lake compare?

Otter Tail Lake's grade of A matches or beats the Minnesota state average of C. It ranks #39 of 97 lakes in Otter Tail County by water quality score. Multi-year monitoring data shows water quality is stable based on 5 years of records.