How Clean Is Jamestown Reservoir?
Jamestown Reservoir has poor water quality, with elevated phosphorus and algae. It received a water quality grade of D (Poor) based on EPA monitoring data. Water clarity (Secchi depth): 6 ft. Phosphorus: 560.5 µg/L. Chlorophyll-a (algae): 17.6 µg/L. Trophic State Index: 69.
Cleanliness Snapshot
| Metric | Jamestown Reservoir | Wisconsin avg |
|---|---|---|
| Overall Grade | D | C |
| Water Clarity (Secchi) | 6 ft | — |
| Phosphorus | 560.5 µg/L | <30 = clean |
| Chlorophyll-a (Algae) | 17.6 µg/L | <10 = clean |
| Trophic State Index | 69 | <50 = clean |
How does Jamestown Reservoir compare?
Jamestown Reservoir's grade of D falls below the Wisconsin state average of C. It ranks #6 of 7 lakes in Stutsman County by water quality score.