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

Email Updates

Sign up to receive monthly email updates on groundwater management activities

Find Your Basin

To determine your basin of residence, click here and type your address into the search bar at the top left of the page

Materiales en Español

Estamos trabajando para proporcionar tantos materiales en español como sea posible

Sonoma Valley groundwater basin land use and crop type map (click to view larger)

Advisory Committee Application:

Business Community Representative

The purpose of the Advisory Committee is to provide input and recommendations to the Agency Board on the groundwater sustainability plan development.

Learn more about the Advisory Committee qualifications, role and responsibilities.


Applications are due to by August 31, 2019.

Recent News

DRAFT GSP Section for Review

The heart of the Sustainable Groundwater Management Act (SGMA) is the Groundwater Sustainability Plan (GSP). The GSP will help our communities determine if our groundwater basins are being sustainable managed, and if not, figure out how to achieve sustainability for the long haul. The GSAs recently completed a first draft of the first section of each GSP, Introduction and Basin Setting. 

What is the Sustainable Groundwater Management Act?
The Sustainable Groundwater Management Act (SGMA) requires that California groundwater basins identified as high or medium priority establish a Groundwater Sustainability Agency by June 30, 2017, and develop a plan for sustainable management by January 31, 2022. If the local GSAs fail to follow the timeline, then the State Water Resources Control Board will step in and intervene in local groundwater management. SGMA defines sustainable management as:

“Management and use of groundwater in a manner that can be maintained during the planning and implementation horizon without causing undesirable results.”

The Sonoma Valley GSA will be tracking six main sustainability indicators:

Lowering Groundwater Levels

Seawater Intrusion

Reduction of Storage

Land Subsidence

Degraded Groundwater Quality

Surface Water Depletion

For more information about groundwater, visit our Understanding Groundwater page or read our Groundwater Primer.
Groundwater Sustainability Plan Development Timeline