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

Reviewed by LakeQuality Editorial Team · Updated

Both Blackwater Lake and Wabedo 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. These two sit close on the readings, Blackwater Lake versus Wabedo Lake. The deciding factors for a recreational visitor are likely physical (depth, access, fish species) rather than water-quality differences.

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.

Blackwater Lake

Cass County, Minnesota

Good clarity, visible to about 14.1 ft.

Wabedo Lake

Cass County, Minnesota

Good clarity, visible to about 10.5 ft.

Side-by-Side Metrics

MetricBlackwater LakeWabedo Lake
Water Clarity14.1 ft Better10.5 ft
Phosphorus12 µg/L Better16 µg/L
Chlorophyll-a (Algae)4 µg/L Better4.9 µg/L
Maximum Depth67 ft95 ft Better
Surface Area771 acres1,226 acres
Public AccessYesYes
Fish Species1619 Better
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.

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Compare Blackwater Lake or Wabedo Lake against a different lake.

Verdict

Both lakes earn the same Grade A. The tiebreakers come down to clarity (Blackwater Lake: 14.1 ft, Wabedo Lake: 10.5 ft) and what you want from the lake. Blackwater Lake has fewer fish species than Wabedo Lake.

Source: EPA National Aquatic Resource Surveys, 2026.