Napa County, California
14 active water systems in this county.
| Water System | Population Served | Source | Violations | Health-Based |
|---|---|---|---|---|
| Calistoga, City of | 5,610 | Surface Water | 37 | 37 |
| St. Helena, City of | 5,386 | Surface Water | 28 | 27 |
| American Canyon, City of | 21,437 | Surface Water | 19 | 18 |
| Napa, City of | 84,804 | Surface Water | 3 | 3 |
| Ovid Napa Valley | 35 | Groundwater | 4 | 0 |
| Saintsbury Winery | 109 | Groundwater | 3 | 0 |
| Antinori California | 25 | Groundwater | 3 | 0 |
| One Hope Winery | 110 | Groundwater | 1 | 0 |
| Bell Wine Cellars | 200 | Groundwater | 0 | 0 |
| Baldacci Family Vineyards | 110 | Groundwater | 0 | 0 |
| Quintessa Winery Water System | 33 | Groundwater | 0 | 0 |
| Bennett Lane Winery | 25 | Groundwater | 0 | 0 |
| Biale Winery | 25 | Groundwater | 0 | 0 |
| Nine Suns Winery | 25 | Groundwater | 0 | 0 |