How Clean Is Minnewashta Lake?
Minnewashta Lake is among the cleanest lakes in Minnesota. It received a water quality grade of A (Excellent) based on EPA monitoring data. Water clarity (Secchi depth): 11.5 ft. Phosphorus: 14 µg/L. Chlorophyll-a (algae): 2.3 µg/L. Trophic State Index: 41.
Cleanliness Snapshot
| Metric | Minnewashta Lake | Minnesota avg |
|---|---|---|
| Overall Grade | A | C |
| Water Clarity (Secchi) | 11.5 ft | — |
| Phosphorus | 14 µg/L | <30 = clean |
| Chlorophyll-a (Algae) | 2.3 µg/L | <10 = clean |
| Trophic State Index | 41 | <50 = clean |
How does Minnewashta Lake compare?
Minnewashta Lake's grade of A matches or beats the Minnesota state average of C. It ranks #2 of 38 lakes in Carver County by water quality score. Multi-year monitoring data shows water quality is declining based on 6 years of records.