D
Swamp Lake
Chisago County, Minnesota
Water Quality Grade: D — Poor
Very murky — less than 1.6 feet of visibility. Phosphorus level: 41 µg/L. Chlorophyll-a: 17 µg/L.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 0.5 m | F |
| Phosphorus | 41 µg/L | C |
| Chlorophyll-a (Algae) | 17 µg/L | C |
County Ranking
Ranked #25 of 38 lakes in Chisago County
Data Sources
Data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2024-09-19
Monitoring stations: 1