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Sustainable Groundwater Management Act 


The Delta website provides information on sustainable groundwater management activities, meetings and resources in the Delta-Mendota Subbasin. The Sustainable Groundwater Management Act, passed in 2014, requires the formation of local Groundwater Sustainability Agencies (GSAs) to oversee the development and implementation of Groundwater Sustainability Plans (GSPs), with the ultimate goal of achieving sustainable management of the State’s groundwater basins. The website will provide updates on preparation of the GSPs for the Delta-Mendota Subbasin, as well as meeting announcements and availability of draft plans, maps and other relevant documents

Delta-Mendota Sub-basin FAQ 2023 - Click Here      Delta-Mendota SGMA  2024 May - June Newsletter - Click Here

The Santa Nella County Water District (SNCWD) in conjunction with the Northern and Central Delta-Mendota Groundwater Sustainability Agencies (GSAs) has been working on the Groundwater Sustainablity Plan (GSP) as required under the Sustainable Groundwater Management Act (SGMA).  The GSP will be a very large document, estimated to be approximately 1,000 pages.  In order to provide an efficient way to review the document before adoption by the GSAs, draft chapters of the GSP are being posted on the Delta-Mendota Subbasin website: 

The following are instructions for locating completed draft chapters on the website:

    • sSearch
    • sSelect the website
    • sSelect "Learn More" at the top of the webpage
    • sSelect Northern & Central Delta-Mendota GSP
    • sScroll Down to near the bottom of the page and select "Draft Documents for Revew" 
    • sCompleted draft chapters will be listed 
    • sSelect the chapters for review 
    • sThe documents can be saved to your computer for later review

All SNCWD customers and any interested parties are encouraged to review the chapters.  Once the GSP is fully developed, which is scheduled for August 2019, the GSP will be presented to all member agencies of the GSAs for adoption before final adoption by the GSAs. 

If you have any questions, please contact Amy Montgomery at (209) 826-0920 or