The City of Vacaville Groundwater Sustainability Agency (Vacaville GSA) was formed in April 2017 to sustainably manage groundwater resources beneath and within the boundaries of the City. 

The Vacaville GSA is currently working cooperatively with other GSAs within the local groundwater sub-basin to create a Groundwater Sustainability Plan (GSP). The GSP will identify how the agencies will manage the groundwater resources in the Solano Sub-Basin so that it will be sustainable as defined by state law. A final GSP must be submitted to the State Department of Water Resources (DWR) by January 31, 2022.

The City of Vacaville overlies the Solano Sub-Basin of the Sacramento Valley Groundwater Basin. In 2014, DWR identified the Solano Sub-Basin as a medium-priority basin through the California Statewide Groundwater Elevation Monitoring (CASGEM) Program. A summary of the conditions of the Solano Sub-Basin is available here.

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On April 11, 2017, City Council gave direction to staff to prepare an exclusive Vacaville GSA.

A notice of the intent to form a groundwater sustainability agency was published in accordance with California Government Code Section 6066, and a public hearing was held on April 25, 2017. Following the public hearing, City Council adopted Resolution No. 2017-046 to become a GSA.

The City filed a notice with DWR on April 28, 2017, as required by the Sustainable Groundwater Management Act.

Sustainable Groundwater Management in California

In September 2014, Governor Edmund G. Brown, Jr. signed the Sustainable Groundwater Management Act (SGMA). This act establishes a structure for groundwater management and empowers local agencies to manage basins sustainably.

SGMA also:

  • Establishes a definition of “sustainable groundwater management”
  • Requires the adoption of Groundwater Sustainability Plans for the state’s priority groundwater basins
  • Establishes a timetable for adoption of Groundwater Sustainability Plans
  • Establishes basic requirements for Groundwater Sustainability Plans

For additional information on SGMA, please see the following state websites: