How Clean Is Pewaukee Lake?
Pewaukee 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): 7.5 ft. Phosphorus: 19.9 µg/L. Trophic State Index: 48.
Cleanliness Snapshot
| Metric | Pewaukee Lake | Wisconsin avg |
|---|---|---|
| Overall Grade | B | C |
| Water Clarity (Secchi) | 7.5 ft | — |
| Phosphorus | 19.9 µg/L | <30 = clean |
| Trophic State Index | 48 | <50 = clean |
How does Pewaukee Lake compare?
Pewaukee Lake's grade of B matches or beats the Wisconsin state average of C. It ranks #23 of 45 lakes in Waukesha County by water quality score. Multi-year monitoring data shows water quality is improving based on 6 years of records.