C
Helmer_nelson Pond Deep
Cook County, Minnesota
Water Quality Grade: C — Fair
Very murky — less than 2.5 feet of visibility. Phosphorus level: 60 µg/L. Chlorophyll-a: 2.9 µg/L.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 0.75 m | F |
| Phosphorus | 60 µg/L | D |
| Chlorophyll-a (Algae) | 2.9 µg/L | A |
County Ranking
Ranked #111 of 144 lakes in Cook County
Data Sources
Data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2025-05-21
Monitoring stations: 1