A
Oconomowoc Lake No. 1
Washington County, Wisconsin
Water Quality Grade: A — Excellent
Good clarity — visible to about 13.8 feet. Phosphorus level: 16 µg/L.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 4.2 m | B |
| Phosphorus | 16 µg/L | A |
| Chlorophyll-a (Algae) | No data |
County Ranking
Ranked #45 of 68 lakes in Washington County
Data Sources
Data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2023-08-02
Monitoring stations: 1