How Clean Is Jamestown Reservoir?
Jamestown Reservoir 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): 7.2 ft. Phosphorus: 527 µg/L. Chlorophyll-a (algae): 8.6 µg/L. Trophic State Index: 65.
Cleanliness Snapshot
| Metric | Jamestown Reservoir | North Dakota avg |
|---|---|---|
| Overall Grade | C | C |
| Water Clarity (Secchi) | 7.2 ft | — |
| Phosphorus | 527 µg/L | <30 = clean |
| Chlorophyll-a (Algae) | 8.6 µg/L | <10 = clean |
| Trophic State Index | 65 | <50 = clean |
How does Jamestown Reservoir compare?
Jamestown Reservoir's grade of C matches or beats the North Dakota state average of C. It ranks #1 of 3 lakes in Stutsman County by water quality score.
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