How Clean Is Crystal Lake?
Crystal 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): 9.5 ft. Trophic State Index: 45.
Cleanliness Snapshot
| Metric | Crystal Lake | Wisconsin avg |
|---|---|---|
| Overall Grade | C | B |
| Water Clarity (Secchi) | 9.5 ft | — |
| Trophic State Index | 45 | <50 = clean |
How does Crystal Lake compare?
Crystal Lake's grade of C falls below the Wisconsin state average of B. It ranks #3 of 7 lakes in Hillsdale County by water quality score.