GSP Development

The County received state grant funding to develop a GSP in compliance with the Sustainable Groundwater Management Act (SGMA). Thus, the County of San Luis Obispo GSA and the City of Arroyo Grande GSA are jointly developing a Groundwater Sustainability Plan (GSP) for the sustainable management of the Arroyo Grande Subbasin. The technical analysis resulting from the development of the GSP will provide information necessary for the preparation of the Arroyo Grande Creek Habitat Conservation Plan under development by the San Luis Obispo County Flood Control and Water Conservation District. A key component in the GSP includes the development of an integrated surface water and groundwater model that will help decision makers better understand the interconnections between the groundwater basin and the Arroyo Grande Creek watershed.  

Get Email Project Updates

Subscribe to the project email list and you’ll be notified of upcoming opportunities regarding the development of the GSP. You can unsubscribe at any time.


Attend a Public Meeting

The Groundwater Sustainability Agency members will be giving periodic project updates at regularly scheduled public meetings of the County Board of Supervisors and the Arroyo Grande City Council. The public is welcome to attend to learn more or to provide public comment.

View Meeting Schedule

Attend a Public Workshop

Join educational and interactive stakeholder workshops to learn about, and inform, the development of the Groundwater Sustainability Plan (GSP). Workshops are aligned to key plan milestones.

View Workshop Schedule

Workshop #1: Basin Setting and Visioning

Tuesday, December 15, 2020 • 3:00pm-5:00pm • Virtual via Zoom Webinar

In this virtual workshop, attendees helped create a shared set of guiding principles for what a “sustainable Arroyo Grande Subbasin” means. To inform the interactive exercise, the project team described the purpose of the Groundwater Sustainability Plan (GSP), including how it will support and integrate with other initiatives like the Watershed Management Plan and Habitat Conservation Plan. The team also described some basics of groundwater and the requirements of the Sustainable Groundwater Management Act (SGMA) in easy-to-understand terms. Next, they provided an overview of the Basin Setting including the Basin’s unique geological makeup, potential challenges associated with groundwater management, and anticipated future groundwater use. Stakeholders input documented in the workshop activity will be used to create a set of guiding principles that will inform the remaining GSP decisions.

View the Workshop Recording, Part 1

View the Workshop Recording, Part 2

Download Meeting Presentation (PDF)

Download Workshop Summary and Resulting Guiding Principles for the GSP (PDF)

Workshop #2: Sustainable Goal Setting

Wednesday, December 15, 2021 • 3:00pm-5:00pm • Virtual via Zoom Webinar

In this online workshop, participants helped create the guiding principles for groundwater sustainability in the Arroyo Grande Subbasin.

Workshop topics included:

  • Overviews of the following GSP Chapters: Chapter 4 Subbasin Setting, Chapter 5 Groundwater Conditions, and Chapter 6 Water Budget
  • An overview of Groundwater Dependent Ecosystems
  • An introduction to Sustainable Management Criteria, including a Q&A session
  • An update on the integrated computer model to be used as a decision support tool
  • Next steps for GSP development

View the Workshop Recording

Download Meeting Presentation (PDF)

Workshop #3: Projects and Management Actions

Date/time to be determined • Virtual via Zoom Webinar

In this virtual workshop, stakeholders will help inform a preliminary set of projects and management actions that will be used over the next 20 years to reach the sustainability goals set for the basin. To inform the interactive exercises, the project team will recap the guiding principles developed with stakeholders, as well as the sustainability goals developed in workshop #2. Activities will surface considerations for sharing project costs, and an implementation plan that keeps the approach flexible and on track. Stakeholder input documented in this workshop will be used to draft chapters 9-10 of the GSP. Registration Opens Soon

Review and Comment on the GSP

Review and comment on draft sections/chapters of the GSP and related documents.

To submit comments on draft GSP documents:

  • Fill out the embedded comment form below or click here to open the form in a new window.
  • Once the form has been submitted, you will receive an email confirming that your comment has been received.
  • Attachments and supporting documents for public comments can be emailed to [email protected].
  • Additionally, all materials on GSP development are accessable via the GSP Resources folder.

Click here to view all submitted public comments and responses (PDF)

Draft Chapters Public Comment Period                     
Chapter 1 - Introduction March 12, 2021 - April 30, 2021 (closed)
Chapter 2 - Agency Information March 12, 2021 - April 30, 2021 (closed)
Chapter 3 - Description of Plan Area June 7, 2021 - July 15, 2021 (closed)
Chapter 4 - Subbasin Setting September 13, 2021 - October 15, 2021 (closed)
Chapter 5 - Groundwater Conditions November 18, 2021 - December 20, 2021 (closed)
Chapter 6 - Water Budget December 7 2021 - January 10, 2022 (closed)
Chapter 7 - Monitoring Network  
Chapter 8 - Sustainable Management Criteria  
Chapter 9 - Projects and Management Actions  
Chapter 10 - Implementation Plan  
Chapter 11 - Notice and Communications  
Chapter 12 - Interagency Agreements  
Chapter 13 - Reference List  
Communications & Engagement Plan  
Executive Summary  



Related Forms & Documents

GSP Resources

Contact Public Works via web form, email, or call us at (805) 781-5252.