How Clean Is Upper Bottle Lake?
Upper Bottle 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): 16 ft. Phosphorus: 11 µg/L. Chlorophyll-a (algae): 3 µg/L. Trophic State Index: 39.
Cleanliness Snapshot
| Metric | Upper Bottle Lake | Minnesota avg |
|---|---|---|
| Overall Grade | A | C |
| Water Clarity (Secchi) | 16 ft | — |
| Phosphorus | 11 µg/L | <30 = clean |
| Chlorophyll-a (Algae) | 3 µg/L | <10 = clean |
| Trophic State Index | 39 | <50 = clean |
How does Upper Bottle Lake compare?
Upper Bottle Lake's grade of A matches or beats the Minnesota state average of C. It ranks #16 of 68 lakes in Hubbard County by water quality score. Multi-year monitoring data shows water quality is stable based on 6 years of records.