How Clean Is Mazaska Lake?
Mazaska 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): 2.5 ft. Phosphorus: 99 µg/L. Trophic State Index: 67.
Cleanliness Snapshot
| Metric | Mazaska Lake | Minnesota avg |
|---|---|---|
| Overall Grade | F | C |
| Water Clarity (Secchi) | 2.5 ft | — |
| Phosphorus | 99 µg/L | <30 = clean |
| Trophic State Index | 67 | <50 = clean |
How does Mazaska Lake compare?
Mazaska Lake's grade of F falls below the Minnesota state average of C. It ranks #10 of 12 lakes in Rice County by water quality score. Multi-year monitoring data shows water quality is declining based on 5 years of records.