The Upper Valley Aquifer Subbasin includes King City and San Lucas. Covering 371 square miles, the focus of this subbasin has been on a robust set of potential management actions and projects that could be undertaken.
The Upper Valley Aquifer Subbasin Committee meets quarterly on the fourth Monday of the month at 1 p.m. (January, April, July, October). Get meeting information.
Key Documents:
- 2022 Groundwater Sustainability Plan
- Appendices
- The Groundwater Sustainability Plan (GSP) was adopted on Jan. 13, 2022, by Resolution 2022-03
- The GSP was submitted to the Department of Water Resources (DWR) on Jan. 24, 2022. View the status on the SGMA website.
A GSP 5-Year Evaluation under California’s Sustainable Groundwater Management Act (SGMA) is a periodic review conducted by Groundwater Sustainability Agencies to assess the effectiveness and progress of their groundwater management efforts.
- Upper Valley Aquifer Subbasin HCM Update: Data, Methods, and Findings (PDF)
- Upper Valley Subbasin Water Year 2025 Annual Report (PDF)
- Upper Valley Subbasin Water Year 2024 Annual Report (PDF)
- Upper Valley Subbasin Water Year 2023 Annual Report (PDF)
- Upper Valley Subbasin Water Year 2022 Annual Report (PDF)
- Upper Valley Subbasin Water Year 2021 Annual Report (PDF)