Is Ml-Thains Lake Safe for Swimming?
Ml-Thains Lake in Mille Lacs County, Minnesota has a water quality grade of B (Good). Good for swimming, clear water with low algae levels. Water clarity: 5.3 ft visibility. Phosphorus: 26 µg/L. Chlorophyll-a (algae): 3.5 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | B (Good) |
| Water Clarity (Secchi Depth) | 5.3 ft |
| Phosphorus | 26 μg/L |
| Chlorophyll-a (Algae) | 3.5 μg/L |
| Maximum Depth | 42 ft |
| Location | Mille Lacs County, Minnesota |
How does Ml-Thains Lake compare?
With an overall water quality grade of B, Ml-Thains Lake matches or beats the Minnesota state average of Grade C. It ranks #6 of 11 lakes in Mille Lacs County by water quality score.
Water clarity (Secchi depth) sits at 5.3 feet. That falls into moderate clarity — typical for lakes with some nutrient enrichment. Algae levels (chlorophyll-a) measure 3.5 µg/L — low and well within safe swimming guidelines.