How Clean Is Beaver Lake?
Beaver Lake has fair water quality — typical of lakes with moderate nutrient enrichment. It received a water quality grade of C (Fair) based on EPA monitoring data. Water clarity (Secchi depth): 1.4 ft. Phosphorus: 112.5 µg/L. Chlorophyll-a (algae): 4.8 µg/L. Trophic State Index: 63.
Cleanliness Snapshot
| Metric | Beaver Lake | North Dakota avg |
|---|---|---|
| Overall Grade | C | C |
| Water Clarity (Secchi) | 1.4 ft | — |
| Phosphorus | 112.5 µg/L | <30 = clean |
| Chlorophyll-a (Algae) | 4.8 µg/L | <10 = clean |
| Trophic State Index | 63 | <50 = clean |
How does Beaver Lake compare?
Beaver Lake's grade of C matches or beats the North Dakota state average of C. It ranks #1 of 1 lakes in Logan County by water quality score.
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