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Altoona Lake and Lake Menomin both received the same overall water quality grade of D (Nutrient-rich). Both are in Wisconsin.

Reviewed by LakeQuality Editorial Team · Updated

Both Altoona Lake and Lake Menomin sit in Wisconsin. A same-state comparison strips out the state-level water-quality regime as a variable: any grade differences here are about the lakes themselves, not the agencies grading them. These two are within a letter of each other on the rubric — Altoona Lake (D) versus Lake Menomin (D). The deciding factors for a recreational visitor are likely physical (depth, access, fish species) rather than water-quality differences.

With grades 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.

D

Altoona Lake

Eau Claire County, Wisconsin

Very murky, less than 3 ft of visibility.

D

Lake Menomin

Dunn County, Wisconsin

Very murky, less than 3.1 ft of visibility.

Side-by-Side Metrics

MetricAltoona LakeLake Menomin
Overall GradeD (Nutrient-rich)D (Nutrient-rich)
Water Clarity3 ft3.1 ft Better
Phosphorus99.6 µg/L89.7 µg/L Better
Chlorophyll-a (Algae)No dataNo data
Maximum Depth25 ft34 ft Better
Surface Area720 acres1,009 acres
Public AccessYesYes
Fish Species45 Better
Trophic Stateeutrophiceutrophic

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 D. The tiebreakers come down to clarity (Altoona Lake: 3 ft, Lake Menomin: 3.1 ft) and what you want from the lake. Altoona Lake has fewer fish species than Lake Menomin.

Source: EPA National Aquatic Resource Surveys, 2026.