D
Long Lake
Watonwan County, Minnesota
Water Quality Grade: D — Poor
Very murky — less than 2.8 feet of visibility. Phosphorus level: 65.5 µg/L.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 0.84 m | F |
| Phosphorus | 65.5 µg/L | D |
| Chlorophyll-a (Algae) | No data |
County Ranking
Ranked #3 of 5 lakes in Watonwan County
Data Sources
Data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2024-09-04
Monitoring stations: 1