Skip to content

THIS WEBSITE IS CURRENTLY UNDER CONSTRUCTION. THANKS FOR YOUR UNDERSTANDING AS WE RECONFIGURE!

Meeting of the Central Delta-Mendota GSA JPA Board Thursday, May 28, 2026, 10:00 a.m. PST
Spring 2026 newsletter now available!
Meeting of the Central Delta-Mendota GSA JPA Board Thursday, May 28, 2026, 10:00 a.m. PST
Spring 2026 newsletter now available!

Sustainable Groundwater Management

Supporting groundwater sustainability in the Delta-Mendota Subbasin

The Delta-Mendota Subbasin Groundwater Sustainability Agencies are working together to implement SGMA, support long-term groundwater sustainability, and provide clear information to landowners, water users, interested parties, and the public.
View Meeting Materials
Explore the Groundwater Sustainability Plan

Quick Information

Looking for a meeting, document, or program?

Use this website as the central location for Subbasin meeting materials, planning documents, data tools, program information, and public participation resources.
Quick Links

Find what you need

Commonly requested resources are organized below to help users quickly access meeting materials, planning documents, programs, data tools, and contact information.

Meetings

View meeting calendar, agendas, packets, minutes, and past meeting materials

Groundwater Sustainability Plan

Access the current GSP, related agreements, and SGMA planning resources.

Programs & Newsletters

Learn about current programs, including the Domestic Well Mitigation Program, and access the latest newsletter.

Data & Mapping

Access groundwater data, mapping tools, and the Data Management System.

Reference Materials

Find FAQs, policies, forms, templates, and technical resources.

Contact us

Reach the appropriate Subbasin contact for questions or more information.

About the Delta-Mendota Subbasin

The Delta-Mendota Subbasin is located along the western side of California’s San Joaquin Valley and includes multiple local agencies working together to manage groundwater under California’s Sustainable Groundwater Management Act.
 
This website serves as a central location for information related to sustainable groundwater management in the Delta-Mendota Subbasin, including meeting materials, planning documents, programs, data tools, and opportunities for public participation.
 
Learn about the GSA structure

What is SGMA

The Sustainable Groundwater Management Act, commonly known as SGMA, is California’s framework for local groundwater management.
 
Click here for more information

What is a GSP?

A Groundwater Sustainability Plan, or GSP, describes how a basin or subbasin will be managed over time to avoid undesirable results and support long-term groundwater sustainability.

Meetings and Public Participation

Public participation is an important part of sustainable groundwater management. Meeting materials, including agendas, packets, and minutes, are posted to support transparency and provide interested parties with access to current and past Subbasin activities.

View Meeting Materials

Events

Today

Questions?

Contact the Delta-Mendota Subbasin

For questions about the Delta-Mendota Subbasin, meeting materials, groundwater sustainability planning, or available programs, please contact the Subbasin representative listed on the Contact Us page.

Contact Us