Is Western Stump Lake Safe for Swimming?
Western Stump Lake in Nelson County, North Dakota has a water quality grade of F (Very Poor). Avoid swimming, very poor water quality, potential algae toxins. Water clarity: 4.3 ft visibility. Phosphorus: 154.5 µg/L. Chlorophyll-a (algae): 36.7 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | F (Very Poor) |
| Water Clarity (Secchi Depth) | 4.3 ft |
| Phosphorus | 154.5 μg/L |
| Chlorophyll-a (Algae) | 36.7 μg/L |
| Maximum Depth | 77.1 ft |
| Location | Nelson County, North Dakota |
How does Western Stump Lake compare?
With an overall water quality grade of F, Western Stump Lake falls below the North Dakota state average of Grade C. It ranks #7 of 9 lakes in Nelson County by water quality score.
Water clarity (Secchi depth) sits at 4.3 feet. That falls into moderate clarity — typical for lakes with some nutrient enrichment. Algae levels (chlorophyll-a) measure 36.7 µg/L — elevated; risk of harmful algal bloom advisories increases at this concentration.