How Clean Is Brookfield Lake?
Brookfield 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): 4.4 ft. Phosphorus: 19.7 µg/L. Chlorophyll-a (algae): 4.9 µg/L. Trophic State Index: 50.
Cleanliness Snapshot
| Metric | Brookfield Lake | Wisconsin avg |
|---|---|---|
| Overall Grade | B | C |
| Water Clarity (Secchi) | 4.4 ft | — |
| Phosphorus | 19.7 µg/L | <30 = clean |
| Chlorophyll-a (Algae) | 4.9 µg/L | <10 = clean |
| Trophic State Index | 50 | <50 = clean |
How does Brookfield Lake compare?
Brookfield Lake's grade of B matches or beats the Wisconsin state average of C. It ranks #1 of 4 lakes in Linn County by water quality score.