How Clean Is Big Swan Lake?
Big Swan Lake has very poor water quality and a high algae bloom risk. It received a water quality grade of F (Very Poor) based on EPA monitoring data. Water clarity (Secchi depth): 2.6 ft. Phosphorus: 86.5 µg/L. Chlorophyll-a (algae): 61.3 µg/L. Trophic State Index: 68.
Cleanliness Snapshot
| Metric | Big Swan Lake | Minnesota avg |
|---|---|---|
| Overall Grade | F | C |
| Water Clarity (Secchi) | 2.6 ft | — |
| Phosphorus | 86.5 µg/L | <30 = clean |
| Chlorophyll-a (Algae) | 61.3 µg/L | <10 = clean |
| Trophic State Index | 68 | <50 = clean |
How does Big Swan Lake compare?
Big Swan Lake's grade of F falls below the Minnesota state average of C. It ranks #12 of 19 lakes in Meeker County by water quality score. Multi-year monitoring data shows water quality is improving based on 5 years of records.