A
Long Lake - Deep Hole/Site A
Walworth County, Wisconsin
Water Quality Grade: A — Excellent
Crystal clear — you can see 21.3 feet down. Phosphorus level: 20.7 µg/L.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 6.5 m | A |
| Phosphorus | 20.7 µg/L | B |
| Chlorophyll-a (Algae) | No data |
County Ranking
Ranked #57 of 69 lakes in Walworth County
Data Sources
Data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2025-08-25
Monitoring stations: 1