A
Bear Trap Lake -
Pierce County, Wisconsin
Water Quality Grade: A — Excellent
Crystal clear — you can see 29.5 feet down. Phosphorus level: 24.9 µg/L.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 9 m | A |
| Phosphorus | 24.9 µg/L | B |
| Chlorophyll-a (Algae) | No data |
County Ranking
Ranked #52 of 113 lakes in Pierce County
Data Sources
Data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2025-09-23
Monitoring stations: 1