How Clean Is Lake Marie?
Lake Marie 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): 7.8 ft. Phosphorus: 13 µg/L. Chlorophyll-a (algae): 2.7 µg/L. Trophic State Index: 43.
Cleanliness Snapshot
| Metric | Lake Marie | Wisconsin avg |
|---|---|---|
| Overall Grade | B | C |
| Water Clarity (Secchi) | 7.8 ft | — |
| Phosphorus | 13 µg/L | <30 = clean |
| Chlorophyll-a (Algae) | 2.7 µg/L | <10 = clean |
| Trophic State Index | 43 | <50 = clean |
How does Lake Marie compare?
Lake Marie's grade of B matches or beats the Wisconsin state average of C. It ranks #1 of 2 lakes in Mercer County by water quality score.