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Solano Groundwater Management Act

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 for the Solano Subbasin.

A GSP for the Solano Subbasin was submitted to the California Department of Water Resources (DWR) on January 31, 2022. 

The intent of the Solano Collaborative is to have an open, transparent, and stakeholder-driven GSP. The purpose of the Solano GSP website is to provide information for stakeholders on the process and how to participate in GSP Implementation.

Please subscribe to the Solano GSP email list on if you wish to receive periodic updates and announcements.

For more information on SGMA, GSAs, or the GSP, please visit the Solano GSP website at: Solano Groundwater Sustainability Plan | ( Para información en español | (

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