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
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Groundwater Sustainability Plan

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

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

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Materiales en Español

Estamos trabajando para proporcionar tantos materiales en español como sea posible

Public Hearing on Final Groundwater Sustainability Plan

A Board Meeting and Public Hearing will be held on Monday, December 6 at 4:00 p.m. via Zoom for the GSA Board of Directors to consider adoption of the final Sonoma Valley Groundwater Basin Groundwater Sustainability Plan.

Drought and Groundwater

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

Defining Sustainability in the Sonoma Valley

The GSA Board and Advisory Committee are working hard to develop locally appropriate definitions of sustainable groundwater management for the six sustainability indicators, below, as required by SGMA.

Go the Groundwater Sustainability Plan pages for updates.

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.