Napa-Sonoma Valley – Sonoma Valley
Statistics
- Basin Name
- Napa-Sonoma Valley – Sonoma Valley
- Basin Number
- 2-002.02
- SGMA Basin Priority
- High
- Critically Overdrafted
- No
- Hydrologic Region Name
- San Francisco Bay
- Counties
- Sonoma
- Adjacent Basins
At-A-Glance
Located in California’s San Francisco Bay hydrologic region, the Napa-Sonoma Valley – Sonoma Valley is 44,846.18 acres in size. This High priority basin is home to an estimated 31,275 people (2010 value). It has approximately 1287 wells, of which approximately 42 are water supply wells. Groundwater accounts for approximately 64 percent of the basin’s water supply.
Source: CA DWR
Basin Notes
2003: Bulletin 118 basin description
2019: Basin boundary modification approved. Per DWR: It “revises and aligns the shared boundary between Sonoma Valley and Sonoma Lowlands to follow the shared Sonoma and Napa County line.” Phase 2 Draft prioritization: High.
2022: January 29 – GSP submitted to DWR
2023: January 26 – GSP approved by DWR