How Clean Is Hill River Lake?
Hill River 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): 4.6 ft. Phosphorus: 95 µg/L. Trophic State Index: 62.
Cleanliness Snapshot
| Metric | Hill River Lake | Minnesota avg |
|---|---|---|
| Overall Grade | D | C |
| Water Clarity (Secchi) | 4.6 ft | — |
| Phosphorus | 95 µg/L | <30 = clean |
| Trophic State Index | 62 | <50 = clean |
How does Hill River Lake compare?
Hill River Lake's grade of D falls below the Minnesota state average of C. It ranks #18 of 20 lakes in Polk County by water quality score. Multi-year monitoring data shows water quality is improving based on 5 years of records.