How Clean Is Grafton Millpond?
Grafton Millpond has very poor water quality and a high algae bloom risk. It received a water quality grade of F (Very Poor) based on EPA monitoring data. Phosphorus: 110 µg/L. Trophic State Index: 72.
Cleanliness Snapshot
| Metric | Grafton Millpond | Wisconsin avg |
|---|---|---|
| Overall Grade | F | C |
| Phosphorus | 110 µg/L | <30 = clean |
| Trophic State Index | 72 | <50 = clean |
How does Grafton Millpond compare?
Grafton Millpond's grade of F falls below the Wisconsin state average of C. It ranks #9 of 9 lakes in Ozaukee County by water quality score.