The Sonoma Valley Groundwater Sustainability Agency (GSA) is a public agency formed to sustainably manage groundwater in the Sonoma Valley groundwater basin. The agency was formed in June 2017 and has a Board of Directors, an Administrator and an Advisory Committee.

Agendas & Meeting Calendar

Find out when and where the Board of Directors and the Advisory Committee are meeting next.

Groundwater Sustainability Plan

Take a look at the final 20-year plan for groundwater sustainability in the Sonoma Valley subbasin.


Find your local groundwater basin and review and update your water use information on the GUIDE page.

Groundwater Sustainability Fee

Learn more about the recently adopted fee and find answers to frequently asked questions.

The Sonoma Valley Groundwater Sustainability Agency (GSA) board is seeking to fill one Business community interests seat and one At-Large community interests (hydrologist/geologist preference) seat on the Sonoma Valley GSA Advisory Committee.

Sonoma Valley residents interested in groundwater are urged to apply. The Advisory Committee provides input and feedback on policies, programs and projects to the Board of the Sonoma Valley GSA. This agency was formed to meet the requirements of California’s historic Sustainable Groundwater Management Act (SGMA), which went into effect in 2015.

The deadline for submitting applications is is 5:00 pm, Friday, January 16, 2023. Additional information regarding the Advisory Committee and the application for the open seats can be found at

Drought and Groundwater

For more information and resources about the drought, groundwater wells and groundwater monitoring and reporting visit our drought page.

Monthly Email Updates

Find out what’s happening with groundwater activities in Sonoma County by reading the latest email update. Visit the “Email Updates” page to read updates from past months.