Sustainable Groundwater Management Act (SGMA)

The Sustainable Groundwater Management Act (SGMA), signed into law by Governor Jerry Brown, creates a statewide framework for the sustainable, local management of California’s groundwater.

SGMA, which became state law in 2014, directs local agencies to work together to develop local Groundwater Sustainability Plans (GSP) in basins and sub-basins classified by the state as medium or high priority.

BBID Becomes a Groundwater Sustainability Agency (GSA)

Following a public hearing in March 2017, Byron-Bethany Irrigation District’s Board of Directors voted unanimously to become a groundwater sustainability agency (GSA) for a portion of the Tracy Subbasin, which underlies the District’s service area in portions of Contra Costa, San Joaquin and Alameda Counties. The Tracy Subbasin has been classified as medium priority by the California Department of Water Resources (DWR).

As a GSA, the District will work cooperatively with surrounding agencies, cities and counties to manage groundwater in a responsible, sustainable manner.

Tracy Subbasin Map

GSAs in Contra Costa County


  • What Is SGMA?

    The Sustainable Groundwater Management Act (SGMA), signed into law by Governor Jerry Brown, is a combination of three legislative bills, Senate Bill SB 1168 (Pavley), Assembly Bill AB 1739 (Dickinson), and Senate Bill SB 1319 (Pavley). It provides a framework for the sustainable management of California’s groundwater.

  • Key SGMA Milestones

    Under SGMA regulations, GSA formation was required no later than June 30th, 2017. Groundwater sustainability plans for the Tracy Subbasin must be completed by January of 2022. GSAs will have until 2040 to achieve groundwater sustainability.

  • What goes into a Groundwater Sustainability Plan (GSP)?

    Development and implementation of a GSP falls into four main phases:

    • Phase 1: GSA Formation 
    • Phase 2: GSP Preparation and Submission 
    • Phase 3: GSP Review and Evaluation 
    • Phase 4: Implementation and Reporting 
  • What Groundwater Sustainability Agencies Have Been Established?

    Check out the state’s SGMA Portal to view a comprehensive map of submitted GSAs and much more.


What’s Next for BBID

As part of the resolution approved by the BBID Board, the District intends to develop groundwater sustainability plans for portions of the Tracy Subbasin within District boundaries in Contra Costa and San Joaquin Counties, and both within and outside BBID’s boundaries in Alameda County.

The Board voted to enter a memorandum of understanding (MOU) to work with multiple agencies within Contra Costa County.

In San Joaquin County, the District expects to collaborate with the City of Tracy to resolve overlaps in proposed GSA service areas.

In Alameda County, the District plans to pursue an agreement with Zone 7 Water Agency, in which Zone 7 would formally delegate to BBID its authority to manage groundwater within Zone 7’s service area.

Tracy Subbasin Boundary Modification

BBID is part of a coalition of eight local water agencies requesting a boundary modification of the Tracy Subbasin along county lines.

This will ensure that water users in Tracy and San Joaquin counties won’t exercise undue influence on how groundwater is managed in East Contra Costa County.

Click here to read the letter distributed to local water users.

Thanks to the support of at least 75% of the local agencies and water systems in Contra Costa and San Joaquin Counties, we want to inform you that the request to subdivide the Tracy Subbasin along the Contra Costa and San Joaquin County line was submitted to the California Department of Water Resources.

• For information about the basin boundary modification request, and to provide comments on the request, please visit: https://sgma.water.ca.gov/basinmod/modrequest/comments/229

The last date and time for comments is 10/11/2018, 11:59:59PM.

• We will be providing periodic updates on the development of a groundwater sustainability plan. In the meantime, you may obtain more information about this process by visiting https://www.eccc-irwm.org/sgma.html or contact your Groundwater Sustainability Agency (listed on the website).

• If you know of someone else that should be on our mailing list please have them sign up at: groundwaterinfo@dcd.cccounty.us

Click here to view the Basin Boundary Modification Request.


SGMA FAQs

The Department of Water Resources (DWR) compiled a list of commonly-asked questions about SGMA and GSAs here.

Connect with Us

Have questions, or interested in taking part? E-mail us here.