Is Jamestown Reservoir Safe for Swimming?
Jamestown Reservoir in Stutsman County, North Dakota has nutrient and algae measurements on record from state and federal monitoring. A water-quality reading is not a swimming clearance. The state water agency and county health departments post current advisories; check them before you swim.. Water clarity: 7.2 ft visibility. Phosphorus: 527 µg/L. Chlorophyll-a (algae): 8.6 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Water Clarity (Secchi Depth) | 7.2 ft |
| Phosphorus | 527 μg/L |
| Chlorophyll-a (Algae) | 8.6 μg/L |
| Location | Stutsman County, North Dakota |
How does Jamestown Reservoir compare?
On nutrient and algae readings, Jamestown Reservoir matches or beats the North Dakota state average. It ranks #1 of 3 lakes in Stutsman County on nutrient and algae readings.
Water clarity (Secchi depth) sits at 7.2 feet. That puts the lake in good clarity range, with limited algae interference. Algae levels (chlorophyll-a) measure 8.6 µg/L — moderate; acceptable for swimming on most days, but worth checking advisories.
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