How Clean Is Tetonka Lake?
Tetonka Lake is algae-prone, with a higher bloom risk in warm months. Its nutrient and algae readings come from EPA monitoring data. Water clarity (Secchi depth): 3 ft. Phosphorus: 289 µg/L. Chlorophyll-a (algae): 48 µg/L. Trophic State Index: 72.
Cleanliness Snapshot
| Metric | Tetonka Lake | Minnesota avg |
|---|---|---|
| Water Clarity (Secchi) | 3 ft | — |
| Phosphorus | 289 µg/L | <30 = clean |
| Chlorophyll-a (Algae) | 48 µg/L | <10 = clean |
| Trophic State Index | 72 | <50 = clean |
How does Tetonka Lake compare?
Tetonka Lake's readings run above the Minnesota state average. It ranks #6 of 13 lakes in Le Sueur County by water quality score. Multi-year monitoring data shows water quality is improving based on 6 years of records.
Watch Tetonka Lake water quality
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