Solano Subbasin Groundwater Sustainability Plan

Welcome to the Solano Subbasin Groundwater Sustainability Plan

Effective January 1, 2015, the Sustainable Groundwater Management Act (SGMA) established a robust framework for the sustainable management of groundwater resources in California.

SGMA requires that one or more Groundwater Sustainability Agencies (GSAs) must develop, implement, and enforce a Groundwater Sustainability Plan (GSP) for groundwater basins or subbasins that are medium or high priority. The Solano Subbasin is a medium priority subbasin, subject to SGMA, and a GSP (or GSPs) must be developed to manage it in a sustainable manner.

A group of GSAs in the Solano Subbasin have formed the Solano Subbasin GSA Collaborative for the purpose of working together collaboratively to develop a GSP(s) for the Solano Subbasin.

A GSP (or GSPs) for the Solano Subbasin must be submitted to the California Department of Water Resources by January 31, 2022.

The intent of the Solano Collaborative is to have an open, transparent, and stakeholder-driven GSP. The purpose of this website is to provide information for stakeholders on the process and how to participate, and to provide sections of the GSP as they are developed for discussion and input.

Please subscribe to the Solano GSP email list if you wish to receive periodic updates and announcements. This website will be updated as GSP content is developed.


The Full Draft Groundwater Sustainability Plan (GSP) is Posted - Provide Your Comments

Comments can be submitted until November 15, 2021.


If you live in the Solano Subbasin comment today on the Draft GSP, your voice is essential. The Solano Collaborative has released the Draft Groundwater Sustainability Plan (GSP) for the Solano Subbasin for a 30-day public review and comment period. This is your opportunity to provide comments, questions and concerns on the Draft Groundwater Sustainability Plan before it is submitted to the Department of Water Resources. 

Request For Proposals 

Due 4 pm, November 15, 2021

The Solano Subbasin Groundwater Sustainability Agency is accepting proposals for the preparation of a Solano Subbasin GSP implementation fee rate study, and Proposition 218 process and public hearing support. Please find further information and proposal requirements in the RFP here.

Register Today!

Solano Subbasin GSP Virtual Town Hall

Tuesday, November 9 from 5:30 pm – 7:30 pm 


Join us for the upcoming Virtual Town Hall to learn about the final Draft Solano Subbasin Groundwater Sustainability Plan (GSP) and how to provide your input prior to the GSP submission to the California Department of Water Resources in January 2022.

Your voice is an essential part of groundwater planning in the Solano Subbasin – please join us!

This meeting will be held on Zoom; all participants must register in advance. Translation services in Spanish will be available. Have questions, contact Guadalupe Garcia at

Want to learn more about groundwater in the Solano Subbasin?

Check out the Groundwater Guide

También disponible en Español

Register for the

GSP Virtual Town Hall

November 9 from 5:30 pm-7:30 pm


Comment on the Draft GSP

Review and comment on Draft GSP sections by visiting this page

Subscribe to Solano Subbasin GSP Updates

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Am I in the Solano Subbasin?

Clicking on the link above will take you to the Solano Subbasin page where you can access a detailed map of the Solano Subbasin and GSA Boundaries.



Solano Subbasin GSP Virtual Town Hall - November 9 from 5:30 pm - 7:30 pm

The Draft Groundwater Sustainability Plan (GSP) is Complete - Comment Today!



Solano Groundwater Sustainability Agency

810 Vaca Valley Parkway, Vacaville, CA 95688

Tel: 707.451.6090 Fax: 707.451.6099