F
Cottonwood Lake
Lyon County, Minnesota
Water Quality Grade: F — Very Poor
Very murky — less than 1.8 feet of visibility. Phosphorus level: 186 µg/L.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 0.54 m | F |
| Phosphorus | 186 µg/L | F |
| Chlorophyll-a (Algae) | No data |
County Ranking
Ranked #2 of 5 lakes in Lyon County
Data Sources
Data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2021-09-15
Monitoring stations: 1