How Clean Is Diamond Lake?
Diamond Lake is nutrient-rich, with elevated phosphorus and algae. It received a water quality grade of D (Nutrient-rich) based on EPA monitoring data. Water clarity (Secchi depth): 5.6 ft. Phosphorus: 65 µg/L. Chlorophyll-a (algae): 17.4 µg/L. Trophic State Index: 58.
Cleanliness Snapshot
| Metric | Diamond Lake | Minnesota avg |
|---|---|---|
| Overall Grade | D | C |
| Water Clarity (Secchi) | 5.6 ft | — |
| Phosphorus | 65 µg/L | <30 = clean |
| Chlorophyll-a (Algae) | 17.4 µg/L | <10 = clean |
| Trophic State Index | 58 | <50 = clean |
How does Diamond Lake compare?
Diamond Lake's grade of D falls below the Minnesota state average of C. It ranks #16 of 25 lakes in Kandiyohi County by water quality score. Multi-year monitoring data shows water quality is improving based on 6 years of records.
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