How Clean Is Little Birch Lake?
Little Birch Lake is among the cleanest lakes in Minnesota. It received a water quality grade of A (Excellent) based on EPA monitoring data. Water clarity (Secchi depth): 13 ft. Phosphorus: 19 µg/L. Chlorophyll-a (algae): 3.1 µg/L. Trophic State Index: 43.
Cleanliness Snapshot
| Metric | Little Birch Lake | Minnesota avg |
|---|---|---|
| Overall Grade | A | C |
| Water Clarity (Secchi) | 13 ft | — |
| Phosphorus | 19 µg/L | <30 = clean |
| Chlorophyll-a (Algae) | 3.1 µg/L | <10 = clean |
| Trophic State Index | 43 | <50 = clean |
How does Little Birch Lake compare?
Little Birch Lake's grade of A matches or beats the Minnesota state average of C. It ranks #1 of 8 lakes in Todd County by water quality score. Multi-year monitoring data shows water quality is declining based on 6 years of records.