C
Long Trade Lake
Polk County, Wisconsin
Water Quality Grade: C — Fair
Moderate clarity — visible to about 9.8 feet. Phosphorus level: 87.6 µg/L.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3 m | C |
| Phosphorus | 87.6 µg/L | D |
| Chlorophyll-a (Algae) | No data |
Location
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County Ranking
Ranked #71 of 77 lakes in Polk County
Data Sources
Data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2025-08-22
Monitoring stations: 1