B
Delavan Lake
Walworth County, Wisconsin
Water Quality Grade: B — Good
Crystal clear — you can see 24.8 feet down. Phosphorus level: 49.5 µg/L.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 7.55 m | A |
| Phosphorus | 49.5 µg/L | C |
| Chlorophyll-a (Algae) | No data |
Location
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County Ranking
Ranked #20 of 34 lakes in Walworth County
Data Sources
Data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2025-10-27
Monitoring stations: 3