How Clean Is Clear Lake?
Clear Lake has fair water quality — typical of lakes with moderate nutrient enrichment. It received a water quality grade of C (Fair) based on EPA monitoring data. Water clarity (Secchi depth): 6.2 ft. Phosphorus: 33 µg/L. Trophic State Index: 53.
Cleanliness Snapshot
| Metric | Clear Lake | Minnesota avg |
|---|---|---|
| Overall Grade | C | C |
| Water Clarity (Secchi) | 6.2 ft | — |
| Phosphorus | 33 µg/L | <30 = clean |
| Trophic State Index | 53 | <50 = clean |
How does Clear Lake compare?
Clear Lake's grade of C matches or beats the Minnesota state average of C. It ranks #21 of 31 lakes in Washington County by water quality score. Multi-year monitoring data shows water quality is improving based on 3 years of records.