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LakeQuality

How Clean Is Mason Lake?

Mason Lake has fair water quality — typical of lakes with moderate nutrient enrichment. It received a water quality grade of C (Fair) based on EPA monitoring data. Water clarity (Secchi depth): 3 ft. Phosphorus: 21 µg/L. Trophic State Index: 55.

Cleanliness Snapshot

MetricMason LakeMinnesota avg
Overall GradeCC
Water Clarity (Secchi)3 ft
Phosphorus21 µg/L<30 = clean
Trophic State Index55<50 = clean

How does Mason Lake compare?

Mason Lake's grade of C matches or beats the Minnesota state average of C. It ranks #87 of 97 lakes in Otter Tail County by water quality score. Multi-year monitoring data shows water quality is improving based on 2 years of records.