Water Supply & Demand Numbers
Click on the topics below for a quick, by the numbers, look at local Napa County water supplies, demand, activities and future challenges.
- Napa - Lake Hennessey (31,000 AF - acre-feet) and Milliken Reservoir (1,400 AF)
- Yountville - Rector Reservoir (4,500 AF) and Well
- St. Helena - Bell Canyon Reservoir (2,350 AF)
- Calistoga - Kimball Reservoir (275 AF)
- Other municipal supplies include imported water (State Water Project), groundwater, and recycled wastewater
- Napa County FCWCD has 29,025 AF of SWP entitlement
- Napa County FCWCD subcontracts with the Cities of American Canyon, Napa and Calistoga
- Allocations vary annually
- Delta issues are raising concerns about reliability
- Groundwater primarily
- Surface water (diversion/storage)
- Limited Lake Berryessa use
- Some areas receive water and recycled water from municipalities
- Recycled water deliveries to Milliken, Sarco, Tulucay (MST) area and Carneros area
- American Canyon - 4,000 AF
- Napa - 15,500 AF
- Yountville - 600 AF
- St. Helena - 2,000 AF
- Calistoga - 820 AF
- TOTAL - about 23,000 AF
- Agricultural Demands - 32,000 AF
- Winery Demands - 1,300 AF
- Rural Residential Demands - 3,500 AF
- Improved Open Space - 2,800 AF
- Total - 39,600 AF, met by:
- groundwater (31,700 AF),
- surface water (7,000 AF), and
- recycled water (900 AF)
From 2050 Water Resources Study
- North Bay Aqueduct Alternative Intake Studies
- Participation in Delta Habitat Conservation and Conveyance Program
- County Comprehensive Groundwater Monitoring Program Development
- Implementation of the Sustainable Groundwater Management Act
- North Bay Water Reuse Authority Program (water recycling)
- Water Conservation Programs
- Increased competition for available supplies
- Preservation of imported water supplies and related costs
- Preservation and management of groundwater supplies
- Challenges during drought conditions
- Climate Change effects on local and regional supplies
Above provided by Napa County Public Works and Napa County Flood Control & Water Conservation District