Groundwater Sustainability Plan


A Groundwater Sustainability Plan (GSP) is a 20-year plan to ensure the sustainable use of groundwater within a groundwater basin.

The Petaluma Valley Groundwater Sustainability Agency (GSA) is required by state law, the Sustainable Groundwater Management Act (SGMA), to develop a GSP by January 31, 2022.  The goal of the GSP is to establish a standard for “sustainability” of groundwater management and use, and to determine how the basin will achieve this standard.

Throughout 2021, updated draft GSP Sections will be released for comments by stakeholders and the public. The full Draft GSP will be released for comment in Fall 2021. To receive a notice when a Section is available for comment, please sign up to be included on the Interested Parties list.


How to Comment on Draft Sections:
  1. Click on the link to the Draft Section that is open for comment.
  2. Click on the link to the comment form. Most comment forms will include a few optional questions (but your responses would be helpful and appreciated). For specific comments, you must include the page number of the Section.
  3. You cannot “save” your comments, so if you run out of time, click on the “Submit” button. You can always add new comments by returning to the site later and filling out a new form.

For questions about the sections and figures, contact the GSA.

Table of Contents

Section 3 Basin Setting

This section provides information about the physical setting, characteristics, jurisdictions, water sources, land uses and current conditions of the Petaluma Valley Groundwater basin, including the identification of data gaps and levels of uncertainty. This Section also includes the historic, current and projected water budget for the basin.

Please note that Section 3 is the longest, and one of the most technical sections of the GSP. For ease of access and downloading, the materials are currently divided into smaller segments, including the Section 3 Main Body text; Section 3 Appendices; Section 3 figures; Section 3 Water Budget description and figures; Section 3 Water Budget Appendix.

Helpful hint:  Commenters should consider making separate comments for the Main Body text and for the Water Budget text.


Section 3 Main Body Text


Section 3 Appendix 3-A


Section 3 Appendix 3-B

Section 3 Figures 3-2 through 3-19

Section 3 Water Budget Text and Figures


Comment Period Closed for this Section. You will have another chance to comment when the full GSP is released in summer 2021

Section 1 Introduction

In 2014, the State of California enacted the Sustainable Groundwater Management Act (SGMA) that substantially changes the way groundwater is managed in California. This new law requires groundwater basins and subbasins in California designated as medium or high priority under SGMA be managed sustainably.

The Introduction covers the purpose of the GSP, administrative information, and information about outreach and stakeholder engagement including the Board and the Petaluma Valley GSA Advisory Committee.

Read Draft Section 1

Comment Period Closed for this Section. You will have another chance to comment when the full GSP is released in summer 2021

Section 2 Description of Plan Area

This section provides a description of the Plan Area, including the Subbasin’s general physical setting and jurisdictional areas, topography and surface water features, land use characteristics, water source types and uses, existing monitoring and management programs, applicable land use plans, and the well permitting process.

Read New Draft Section 2
Section 2 draft figures 2-1 to 2-4c
Section 2 draft figures 2-5 to 2-9

Comment Period Closed for this Section. You will have another chance to comment when the full GSP is released in summer 2021.

Section 4 Sustainable Management Criteria

In 2020 and early 2021, the GSA is focused on developing Sustainable Management Criteria (SMC) for six SGMA-defined sustainability indicators:  Groundwater levels, groundwater quality, seawater intrusion related to groundwater pumping, land subsidence related to groundwater pumping, groundwater storage, and surface water depletion related to groundwater pumping.

As materials are available, they will be posted for reference and information.