How Clean Is Grindle Lake?
Grindle Lake is a clean lake by Wisconsin standards. It received a water quality grade of B (Good) based on EPA monitoring data. Water clarity (Secchi depth): 9 ft. Phosphorus: 12.4 µg/L. Trophic State Index: 43.
Cleanliness Snapshot
| Metric | Grindle Lake | Wisconsin avg |
|---|---|---|
| Overall Grade | B | C |
| Water Clarity (Secchi) | 9 ft | — |
| Phosphorus | 12.4 µg/L | <30 = clean |
| Trophic State Index | 43 | <50 = clean |
How does Grindle Lake compare?
Grindle Lake's grade of B matches or beats the Wisconsin state average of C. It ranks #37 of 62 lakes in Oconto County by water quality score. Multi-year monitoring data shows water quality is declining based on 6 years of records.