Groundwater Sustainability Plan and Reports

GSAs submit annual report each April 1. The report provides information on groundwater conditions and the implementation of its GSP over the prior water year. For example, the report submitted in April 2022 reports on the 2021 hydrologic year (from October 2020 – September 2021).

Links to completed Solano Subbasin Annual Reports 

The Solano Subbasin Groundwater Sustainability Plan (GSP) was submitted to the California Department of Water Resources (DWR) on Jan. 31, 2022. The Final Draft GSP was noticed on Oct. 15, 2021. Opportunities for comments, including a public meeting, were posted on the Solano Subbasin GSP website.

Please contact to request ADA-compliant materials; please note which materials or sections you are interested in. Please also note that a hard copy of the materials can be made available for viewing during open hours Monday – Saturday at the following addresses:

  • Vacaville Cultural Center Library, 1020 Ulatis Drive, Vacaville, CA 95687
  • Vacaville Town Square Library, 1 Town Square Place, Vacaville, CA 95688
  • Dixon Library, 230 N 1st Street, Dixon, CA 95620
  • Rio Vista Library, 44 South Second Street, Rio Vista, CA 94571
  • Solano County Water Agency, 810 Vaca Valley Parkway, Suite 203, Vacaville, CA 95688 (by appointment only)



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Solano Groundwater Sustainability Agency

810 Vaca Valley Parkway, Vacaville, CA 95688

Tel: 707.451.6090 Fax: 707.451.6099