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P. (209) 826-0920 | F. (209) 826-8359

Sustainable Groundwater Management Act

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 Review" 
    • 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 


Northern and Central Delta-Mendota Regions
Draft Groundwater Sustainability Plan Available for Public Comment
On September 9, 2019, the Northern & Central Delta-Mendota Region Groundwater Sustainability Plan (GSP) Group released the draft Northern & Central Delta-Mendota Region GSP to the applicable cities and counties as part of the 90-day notice of adoption. The draft GSP is now available for review and public comment, as part of a voluntary public comment period, until October 11, 2019.  

Comments are being collected on a chapter-by-chapter basis using the form provided online at Hardcopy versions of the draft GSP can also be viewed in person by visiting the San Luis & Delta-Mendota Water Authority office, Stanislaus County Department of Environmental Resources, or Fresno County Department of Public Works and Planning.

Comments on the draft GSP are due on or before 11:59 p.m. PST, Friday, October 11, 2019. Comments or questions on the GSP or public comment process can also be sent to:

Andrew Garcia
San Luis & Delta-Mendota Water Authority
842 6th Street
Los Banos, CA  93635
Telephone: (209)832-6229

The GSP is a collaborative effort between locally-formed Groundwater Sustainability Agencies in the Northern and Central Delta-Mendota Regions to comply with the Sustainable Groundwater Management Act of 2014. For more information, visit:

Click here to view the draft GSP and submit your comments by October 11, 2019 at 11:59 pm PST