How Clean Is Byllesby Lake?
Byllesby Lake 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. Water clarity (Secchi depth): 3 ft. Phosphorus: 220 µg/L. Trophic State Index: 72.
Cleanliness Snapshot
| Metric | Byllesby Lake | Minnesota avg |
|---|---|---|
| Overall Grade | F | C |
| Water Clarity (Secchi) | 3 ft | — |
| Phosphorus | 220 µg/L | <30 = clean |
| Trophic State Index | 72 | <50 = clean |
How does Byllesby Lake compare?
Byllesby Lake's grade of F falls below the Minnesota state average of C. It ranks #35 of 36 lakes in Dakota County by water quality score. Multi-year monitoring data shows water quality is declining based on 2 years of records.