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Lobster Lake and Maple Lake read the same on nutrients and algae. Both are in Douglas County, Minnesota.

Reviewed by LakeQuality Editorial Team · Updated

Both Lobster Lake and Maple 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: Lobster Lake and Maple 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.

Lobster Lake

Douglas County, Minnesota

Good clarity, visible to about 13 ft.

Maple Lake

Douglas County, Minnesota

Good clarity, visible to about 14.1 ft.

Side-by-Side Metrics

MetricLobster LakeMaple Lake
Water Clarity13 ft14.1 ft Better
Phosphorus20.5 µg/L15 µg/L Better
Chlorophyll-a (Algae)3.6 µg/L3.1 µg/L Better
Maximum Depth65 ft78 ft Better
Surface Area1,334 acres831 acres
Public AccessYesYes
Fish Species18 Better17
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 (Lobster Lake: 13 ft, Maple Lake: 14.1 ft) and what you want from the lake. Lobster Lake supports more documented fish species.

Source: EPA National Aquatic Resource Surveys, 2026.