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How Groundwater Sustainability Works

Groundwater sustainability in the South American Subbasin depends on coordination between statewide policy, local agencies, and basin-wide implementation. Under California’s Sustainable Groundwater Management Act (SGMA), local agencies work together to monitor groundwater conditions, implement management actions, and support long-term sustainability across the basin.

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SGMA

Statewide Direction

The Sustainable Groundwater Management Act (SGMA) is California’s framework for long-term groundwater management and requires groundwater basins to develop plans that support sustainability over time.

Explore the SGMA Portal →

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GSAs

Local Leadership

Groundwater Sustainability Agencies (GSAs) are the local agencies responsible for implementing SGMA within a groundwater basin.

In the South American Subbasin, multiple GSAs work together to coordinate planning, monitoring, and implementation.

Learn about the South American Subbasin →

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SCGA

Basin Coordination

Sacramento Central Groundwater Authority (SCGA) serves as the Plan Manager and Fiscal Agent for the South American Subbasin.

SCGA helps coordinate basin-wide activities, support technical analysis and reporting, and facilitate implementation of the Groundwater Sustainability Plan.

Visit SCGA →

The Groundwater Sustainability Plan (GSP)

The GSP brings together the efforts of SGMA, GSAs, and SCGA in one basin-wide roadmap for sustainable groundwater management. The plan establishes sustainability criteria, monitoring networks, and management actions used to guide long-term implementation.

View the Groundwater Sustainability Plan