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 advisory committee and an administrator.

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 Petaluma 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

Materiales en Español

Estamos trabajando para proporcionar tantos materiales en español como sea posible

Rate and Fee Study

The Petaluma Valley Groundwater Sustainability Agency adopted a fee to pay for the costs of managing the groundwater basin to ensure water is available today and into the future. Information can be found on the links below and here.


Drought and Groundwater

For more information and resources about the drought, groundwater wells, and groundwater monitoring and reporting, check out 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.


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, 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 is 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.