Napa-Sonoma Valley – Sonoma Valley
- Basin Name
- Napa-Sonoma Valley – Sonoma Valley
- Basin Number
- SGMA Basin Priority
- Critically Overdrafted
- Hydrologic Region Name
- San Francisco Bay
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), which have been at a rate of . Napa-Sonoma Valley – Sonoma Valley is a(n) basin with approximately 1287 wells, of which approximately 42 are water supply wells. Groundwater accounts for approximately 64 percent of the basin’s water supply.
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.