Is North Bethany City Reservoir Safe for Swimming?
North Bethany City Reservoir in Harrison County, Wisconsin has a water quality grade of B (Good). Good for swimming, clear water with low algae levels. Water clarity: 10.5 ft visibility. Phosphorus: 11 µg/L. Chlorophyll-a (algae): 6.9 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | B (Good) |
| Water Clarity (Secchi Depth) | 10.5 ft |
| Phosphorus | 11 μg/L |
| Chlorophyll-a (Algae) | 6.9 μg/L |
| Location | Harrison County, Wisconsin |
How does North Bethany City Reservoir compare?
With an overall water quality grade of B, North Bethany City Reservoir matches or beats the Wisconsin state average of Grade C. It ranks #1 of 3 lakes in Harrison County by water quality score.
Water clarity (Secchi depth) sits at 10.5 feet. That counts as exceptional clarity — sunlight penetrates deep, supporting submerged plants and limiting algae. Algae levels (chlorophyll-a) measure 6.9 µg/L — low and well within safe swimming guidelines.