How Clean Is Hattie Lake?
Hattie Lake is among the cleanest lakes in Minnesota. Its nutrient and algae readings come from EPA monitoring data. Water clarity (Secchi depth): 10.3 ft. Phosphorus: 16.5 µg/L. Chlorophyll-a (algae): 4.5 µg/L. Trophic State Index: 44.
Cleanliness Snapshot
| Metric | Hattie Lake | Minnesota avg |
|---|---|---|
| Water Clarity (Secchi) | 10.3 ft | — |
| Phosphorus | 16.5 µg/L | <30 = clean |
| Chlorophyll-a (Algae) | 4.5 µg/L | <10 = clean |
| Trophic State Index | 44 | <50 = clean |
How does Hattie Lake compare?
Hattie Lake's readings match or beat the Minnesota state average. It ranks #49 of 104 lakes in Cass County on nutrient and algae readings. Multi-year monitoring data shows water quality is declining based on 5 years of records.
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