Is Big Birch Lake Safe for Swimming?
Big Birch Lake in Todd County, Minnesota has a water quality grade of C (Fair). Generally safe for swimming, moderate water quality. Water clarity: 12.5 ft visibility. Phosphorus: 25 µg/L. Chlorophyll-a (algae): 4.4 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | C (Fair) |
| Water Clarity (Secchi Depth) | 12.5 ft |
| Phosphorus | 25 μg/L |
| Chlorophyll-a (Algae) | 4.4 μg/L |
| Maximum Depth | 81 ft |
| Location | Todd County, Minnesota |
How does Big Birch Lake compare?
With an overall water quality grade of C, Big Birch Lake matches or beats the Minnesota state average of Grade C. It ranks #2 of 8 lakes in Todd County by water quality score.
Water clarity (Secchi depth) sits at 12.5 feet. That counts as exceptional clarity — sunlight penetrates deep, supporting submerged plants and limiting algae. Algae levels (chlorophyll-a) measure 4.4 µg/L — low and well within safe swimming guidelines.
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