How Clean Is Pine Lake?
Pine 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): 10.2 ft. Phosphorus: 20 µg/L. Chlorophyll-a (algae): 4.4 µg/L. Trophic State Index: 45.
Cleanliness Snapshot
| Metric | Pine Lake | Minnesota avg |
|---|---|---|
| Overall Grade | A | C |
| Water Clarity (Secchi) | 10.2 ft | — |
| Phosphorus | 20 µg/L | <30 = clean |
| Chlorophyll-a (Algae) | 4.4 µg/L | <10 = clean |
| Trophic State Index | 45 | <50 = clean |
How does Pine Lake compare?
Pine Lake's grade of A matches or beats the Minnesota state average of C. It ranks #7 of 37 lakes in Clearwater County by water quality score. Multi-year monitoring data shows water quality is declining based on 6 years of records.