Is Byllesby Lake Safe for Swimming?
Byllesby Lake in Dakota County, Minnesota has a water quality grade of F (Algae-prone). Algae and nutrients are often high — check current advisories before swimming. Skip the water if you see scum or a paint-like bloom. Water clarity: 3 ft visibility. Phosphorus: 227 µg/L. Chlorophyll-a (algae): 40.7 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | F (Algae-prone) |
| Water Clarity (Secchi Depth) | 3 ft |
| Phosphorus | 227 μg/L |
| Chlorophyll-a (Algae) | 40.7 μg/L |
| Maximum Depth | 50 ft |
| Location | Dakota County, Minnesota |
How does Byllesby Lake compare?
With an overall water quality grade of F, Byllesby Lake falls below the Minnesota state average of Grade C. It ranks #41 of 45 lakes in Dakota County by water quality score.
Water clarity (Secchi depth) sits at 3 feet. That falls into moderate clarity — typical for lakes with some nutrient enrichment. Algae levels (chlorophyll-a) measure 40.7 µg/L — elevated; risk of harmful algal bloom advisories increases at this concentration.
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