How Clean Is Upper Estuary Lake?
Upper Estuary 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): 1.9 ft. Phosphorus: 49 µg/L. Trophic State Index: 64.
Cleanliness Snapshot
| Metric | Upper Estuary Lake | Minnesota avg |
|---|---|---|
| Overall Grade | D | C |
| Water Clarity (Secchi) | 1.9 ft | — |
| Phosphorus | 49 µg/L | <30 = clean |
| Trophic State Index | 64 | <50 = clean |
How does Upper Estuary Lake compare?
Upper Estuary Lake's grade of D falls below the Minnesota state average of C. It ranks #200 of 215 lakes in St. Louis County by water quality score.