Annual Reports


Starting with Water Year 2021, the GSA annually reports (by April 1) on the condition of the basin and describes how the Groundwater Sustainability Plan is being implemented in a manner that will likely achieve the subbasin’s sustainability goal.

The Sonoma Valley Subbasin Annual Reports for Water Year 2021, 2022 and 2023 were filed with the California Department of Water Resources and can be found below.