D
Altoona Lake -
Eau Claire County, Wisconsin
Water Quality Grade: D — Poor
Moderate clarity — visible to about 9.8 feet. Phosphorus level: 90.7 µg/L.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3 m | C |
| Phosphorus | 90.7 µg/L | F |
| Chlorophyll-a (Algae) | No data |
County Ranking
Ranked #4 of 6 lakes in Eau Claire County
Data Sources
Data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2025-09-26
Monitoring stations: 1