Protecting groundwater today ensures we have it for tomorrow

Learn more about your individual
Groundwater Sustainability Agencies (GSAs)

As required by the State of California’s Sustainable Groundwater Management Act, three new GSAs were created to manage groundwater in Sonoma County. They are working to protect our groundwater resources and make sure our use of groundwater is sustainable.

Sonoma Valley Groundwater
Sustainability Agency

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Petaluma Valley Groundwater
Sustainability Agency

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Santa Rosa Plain Groundwater
Sustainability Agency

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Together, we can ensure our families have safe and reliable water

Everyone is affected by groundwater in some way! It’s what makes our county beautiful and everyone should want to preserve it.

What is a GSA?

Groundwater Sustainability Agencies (GSAs) are public agencies formed to sustainably manage groundwater in local groundwater basins.

What is a Groundwater Sustainability Plan?

A GSP is a 20-year plan to ensure the sustainable use of groundwater within a groundwater basin. The GSA is required by state law, the Sustainable Groundwater Management Act, to develop a GSP by January 31, 2022.

What is the goal of the GSP?

The goal of the GSP is to establish a standard for sustainability of groundwater management and use, and to determine how the basin will achieve this standard.

Groundwater stats


Around 43,000 people in the three basins rely solely on groundwater for drinking and other basic needs


+21,800 acres of crops and vines combined depend on groundwater for irrigation in the three basin


Estimated 10.1 billion gallons annually for the three basins came from groundwater