Groundwater Sustainability Plan


The Groundwater Sustainability Plan for the Sonoma Valley Groundwater Subbasin (GSP) was submitted to the California Department of Water Resources in January 2022 and approved by DWR on January 26, 2023.  The GSP establishes a standard for sustainability of groundwater management and use, and determines how the basin will achieve this standard by 2042. The GSP and the letter of determination from DWR can be viewed below.

DWR Letter of Determination (approving the GSP and including recommended corrective actions)

Groundwater Sustainability Plan for the Sonoma Valley Subbasin – PDF (228.4 MB)

Individual Sections and Appendices

Cover, Acknowledgements, Glossary, Abbreviations and Acronyms
Executive Summary
Table of Contents
Section 1 – Introduction
Section 2 – Plan Area
Section 3 – Basin Setting
Section 4 – Sustainable Management Criteria
Section 5 – Monitoring Plan
Section 6 – Projects and Management Actions
Section 7 – Implementation Plan
Section 8 – References