How Clean Is Sauk Lake?
Sauk Lake has poor water quality, with elevated phosphorus and algae. It received a water quality grade of D (Poor) based on EPA monitoring data. Water clarity (Secchi depth): 3.9 ft. Phosphorus: 52 µg/L. Chlorophyll-a (algae): 22.3 µg/L. Trophic State Index: 60.
Cleanliness Snapshot
| Metric | Sauk Lake | Minnesota avg |
|---|---|---|
| Overall Grade | D | C |
| Water Clarity (Secchi) | 3.9 ft | — |
| Phosphorus | 52 µg/L | <30 = clean |
| Chlorophyll-a (Algae) | 22.3 µg/L | <10 = clean |
| Trophic State Index | 60 | <50 = clean |
How does Sauk Lake compare?
Sauk Lake's grade of D falls below the Minnesota state average of C. It ranks #16 of 32 lakes in Stearns County by water quality score. Multi-year monitoring data shows water quality is improving based on 6 years of records.