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Altoona Lake and Tainter Lake read the same on nutrients and algae. Both are in Wisconsin.

Reviewed by LakeQuality Editorial Team · Updated

Altoona Lake and Tainter Lake are both in Wisconsin — 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. The readings are close: Altoona Lake and Tainter 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.

Altoona Lake

Eau Claire County, Wisconsin

Very murky, less than 3 ft of visibility.

Tainter Lake

Dunn County, Wisconsin

Murky, only visible to about 3.7 ft.

Side-by-Side Metrics

MetricAltoona LakeTainter Lake
Water Clarity3 ft3.7 ft Better
Phosphorus99.6 µg/L Better121.5 µg/L
Chlorophyll-a (Algae)No dataNo data
Maximum Depth25 ft37 ft Better
Surface Area720 acres1,605 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, Tainter Lake: 3.7 ft) and what you want from the lake. Altoona Lake has fewer fish species than Tainter Lake.

Source: EPA National Aquatic Resource Surveys, 2026.