Is Brookfield Lake Safe for Swimming?
Brookfield Lake in Linn County, Wisconsin has a water quality grade of B (Good). Good for swimming, clear water with low algae levels. Water clarity: 4.4 ft visibility. Phosphorus: 19.7 µg/L. Chlorophyll-a (algae): 4.9 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | B (Good) |
| Water Clarity (Secchi Depth) | 4.4 ft |
| Phosphorus | 19.7 μg/L |
| Chlorophyll-a (Algae) | 4.9 μg/L |
| Location | Linn County, Wisconsin |
How does Brookfield Lake compare?
With an overall water quality grade of B, Brookfield Lake matches or beats the Wisconsin state average of Grade C. It ranks #1 of 4 lakes in Linn County by water quality score.
Water clarity (Secchi depth) sits at 4.4 feet. That falls into moderate clarity — typical for lakes with some nutrient enrichment. Algae levels (chlorophyll-a) measure 4.9 µg/L — low and well within safe swimming guidelines.