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Washburn Lake reads lower on nutrients and algae than George Lake. Both are in Cass County, Minnesota.

Reviewed by LakeQuality Editorial Team · Updated

George Lake and Washburn Lake are both in Minnesota — a same-state head-to-head where the comparison comes down to lake-specific differences in depth, watershed, and monitoring history rather than the broader state-level water-quality regime. Washburn Lake reads materially cleaner than George Lake on nutrients and algae. A gap that wide is unlikely to close in a single year of remediation work; it reflects multi-decade differences in the lakes themselves.

For a recreational visitor, the wider gap in the readings is decisive: Washburn Lake has the lower nutrient and algae numbers. For a researcher, the gap is the interesting part: what is different about the two watersheds, and which of those differences is mutable?

George Lake

Cass County, Minnesota

Murky, only visible to about 5 ft.

Washburn Lake

Cass County, Minnesota

Good clarity, visible to about 14.1 ft.

Side-by-Side Metrics

MetricGeorge LakeWashburn Lake
Water Clarity5 ft14.1 ft Better
Phosphorus40 µg/L11 µg/L Better
Chlorophyll-a (Algae)7.3 µg/L3.7 µg/L Better
Maximum Depth20 ft111 ft Better
Surface Area612 acres1,590 acres
Public AccessYesYes
Fish Species1121 Better
Trophic Stateeutrophicmesotrophic

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.

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Verdict

Washburn Lake reads lower on nutrients and algae than George Lake. Water clarity: 14.1 ft vs 5 ft. For fishing diversity, Washburn Lake also leads with 21 species.

Source: EPA National Aquatic Resource Surveys, 2026.