How Clean Is Whaletail Lake?
Whaletail 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): 3.3 ft. Phosphorus: 45.8 µg/L. Chlorophyll-a (algae): 19.4 µg/L. Trophic State Index: 60.
Cleanliness Snapshot
| Metric | Whaletail Lake | Minnesota avg |
|---|---|---|
| Overall Grade | D | C |
| Water Clarity (Secchi) | 3.3 ft | — |
| Phosphorus | 45.8 µg/L | <30 = clean |
| Chlorophyll-a (Algae) | 19.4 µg/L | <10 = clean |
| Trophic State Index | 60 | <50 = clean |
How does Whaletail Lake compare?
Whaletail Lake's grade of D falls below the Minnesota state average of C. It ranks #29 of 81 lakes in Hennepin County by water quality score. Multi-year monitoring data shows water quality is improving based on 5 years of records.