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Pleasant Lake and Webb Lake read the same on nutrients and algae. Both are in Cass County, Minnesota.

Reviewed by LakeQuality Editorial Team · Updated

Both Pleasant Lake and Webb 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: Pleasant Lake and Webb 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.

Pleasant Lake

Cass County, Minnesota

Crystal clear, you can see 15.5 ft down.

Webb Lake

Cass County, Minnesota

Crystal clear, you can see 18 ft down.

Side-by-Side Metrics

MetricPleasant LakeWebb Lake
Water Clarity15.5 ft18 ft Better
Phosphorus10 µg/L9.5 µg/L Better
Chlorophyll-a (Algae)3.1 µg/L2.9 µg/L Better
Maximum Depth72 ft84 ft Better
Surface Area1,099 acres720 acres
Public AccessYesYes
Fish Species15 Better12
Trophic Stateoligotrophicoligotrophic

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 (Pleasant Lake: 15.5 ft, Webb Lake: 18 ft) and what you want from the lake. Pleasant Lake supports more documented fish species.

Source: EPA National Aquatic Resource Surveys, 2026.