How Clean Is City Millpond?
City Millpond 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. Phosphorus: 38.4 µg/L. Trophic State Index: 57.
Cleanliness Snapshot
| Metric | City Millpond | Wisconsin avg |
|---|---|---|
| Overall Grade | C | B |
| Phosphorus | 38.4 µg/L | <30 = clean |
| Trophic State Index | 57 | <50 = clean |
How does City Millpond compare?
City Millpond's grade of C falls below the Wisconsin state average of B. It ranks #9 of 13 lakes in Green Lake County by water quality score.