The Petaluma Valley Groundwater Sustainability Agency (GSA) is a public agency formed to sustainably manage groundwater in the Petaluma 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 our twenty year plan for groundwater sustainability

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 Water is seeking applicants for a seat on Petaluma Valley GSA Advisory Committee

Sonoma Water is seeking someone who lives or works in the Petaluma Valley Basin, and who is interested in serving on the GSA Advisory Committee. The Advisory Committee provides input and feedback on policies, programs and projects to the Board of the Petaluma Valley GSA.

The Petaluma Valley GSA Advisory Committee consists of 10 members, five of which are appointed by GSA member agencies. The term for the Sonoma Water representative seat is two years. The Advisory Committee meets six to 10 times annually for two to three hours. Advisory Committee members should expect to spend several hours reading materials and preparing for meetings. Advisory Committee members must live or work within or represent an organization with a presence in the Petaluma Valley Groundwater Basin.

Additional information and the application for the Petaluma Valley GSA Advisory Committee application can be found here. 

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.

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 Petaluma 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