A
Onland Lake -
Polk County, Wisconsin
Water Quality Grade: A — Excellent
Crystal clear — you can see 34.5 feet down. Phosphorus level: 11.1 µg/L.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 10.5 m | A |
| Phosphorus | 11.1 µg/L | A |
| Chlorophyll-a (Algae) | No data |
County Ranking
Ranked #14 of 31 lakes in Polk County
Data Sources
Data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2025-10-07
Monitoring stations: 1