Sustainable Groundwater Management

Current Updates

7/16/20 - As part of completing the additional work funded by the Proposition 68 grant agreement, the Request for Proposal (RFP) to implement East Bay Plain Subbasin Characterization Project was advertised. The scope of work includes conducting groundwater pumping tests, completing isotopic sampling of groundwater and streams, and installing 12 monitoring wells. The RFP is listed under the Resource Documents below. 

5/15/20 -  EBMUD executed a Proposition 68 grant agreement amendment with the Department of Water Resources, which provides $758,467 of additional funding for EBMUD and the City of Hayward to complete groundwater pumping tests, conduct isotopic sampling of groundwater and streams, install 12 monitoring wells, and develop a data management system. The executed amendment is available in the list of Resource Documents below.

5/4/20- a Technical Advisory Committee (TAC) meeting was held to discuss completed data gap analysis and model selection tasks. Comments from members of TAC were addressed during and after the meeting. Completed technical memorandums are available in the list of Resource Documents below.

1/24/20 - The Department of Water Resources (DWR) released the draft recommended funding awards lists for the Sustainable Groundwater Management (SGM) Grant Program (Prop 68 grant). The EBMUD and the City of Hayward’s East Bay Plain Subbasin Characterization and Data Management application was conditionally recommended for grant funding for the amount of $758,467.

10/2/19 – East Bay Plain Subbasin Technical Advisory Committee’s (TAC) Groundwater Modeling 101 Workshop for the East Bay Plain Subbasin Groundwater Sustainability Plan Development met from 9:00 am to 10:30 am on October 2, 2019 at EBMUD Administrative Building. Following the workshop, a regular TAC meeting was held from 11:00 am to 12:00 pm. Both the workshop and the meeting were open to the public and all interested parties. The agenda and associated documents are posted under Stakeholder Outreach on this page.

4/18/19 - The Technical Advisory Committee’s (TAC) kick-off meeting for the East Bay Plain Subbasin Groundwater Sustainability Plan Development is scheduled from 10:00 am to 11:30 am on April 24th, 2019 at EBMUD Administrative Building located at 375 11 Street, Oakland, CA 94607. The meeting is open to the public and all interested parties. The agenda is listed below under Stakeholder Outreach. If you need any accommodation or further information, please contact Amy Underwood at

DWR Logo_4 inch_Color_071618.jpg1/8/19 - DWR completed the 2018 SGMA Basin Prioritization process to reassess the priority of the groundwater basins following the 2016 basin boundary modifications, as required by the Water Code. The final results are published on January 4, 2019. From this process, the East Bay Plain Subbasin was determined as a Medium Priority Subbasin.

The following is the link to DWR’s basin prioritization page:

prop_1_logo.jpg12/18/18 - A Proposition 1 Sustainable Groundwater Planning grant agreement was executed between Department of Water Resources and EBMUD on November 9, 2018. The $1 million grant funding is to assist EBMUD in financing the East Bay Plain Subbasin Groundwater Sustainability Plan Development Project. A copy of executed grant agreement is posted in the Resource Documents below. 

9/11/18 - The questions and answers to East Bay Plain GSP Development RFP are posted under "Resource Documents" below.

8/27/18 - The pre-proposal meeting sign-in sheet and a copy of the presentation are posted under "Resource Documents" below.

Sustainable Groundwater Management Act

In stakeholders5.pngSeptember 2014, Governor Brown signed into law three bills collectively known as the Sustainable Groundwater Management Act (SGMA). SGMA creates a statewide framework for sustainable, local groundwater management in California.

SGMA requires eligible local agencies overlying certain basins to form Groundwater Sustainability Agencies (GSAs). GSAs are required to develop Groundwater Sustainability Plans (GSP) to make basins sustainable within 20 years of implementation. 




What is Sustainable Groundwater Management?

Sustainable groundwater management is the management and use of groundwater in a manner that can be maintained now and into the future without causing undesirable results.


Groundwater Sustainablity Plan (GSP)

A GSP is a plan to implement the sustainable groundwater management of the local basins. A typical GSP will include the following components:



• Detailed in CCR Title 23 § 350 - §358.4

• Administrative Information

• Basin Setting

– Hydrogeologic Conceptual Model

– Groundwater Condition

– Water budget

– Management Areas


• Sustainable Management Criteria

– Sustainability Goal

– Undesirable Results

– Minimum Thresholds

– Measurable Objectives

• Monitoring Network

• Projects and Management Actions


Phases of Groundwater Sustainability Plan Development and Implementation

  • Phase 1: GSA Formation 
  • Phase 2: GSP Preparation and Submission 
  • Phase 3: GSP Review and Evaluation 
  • Phase 4: Implementation and Reporting 

East Bay Plain Subbasin and EBMUD

EBMUD’s service area overlies a significant portion of the East Bay Plan Subbasin, which is part of the larger Santa Clara Valley Basin. Following notice in local newspapers and a public hearing, EBMUD’s Board of Directors adopted a resolution to become the GSA for the entire portion of the basin that underlies EBMUD’s service area in 2016. In November 2016, after a 90 day comment period, EBMUD became the exclusive GSA with regulatory and management responsibilities for that portion of the basin (DWR Basin Number 2-009.04). 

Recent Events





A virtual Technical Advisory Committee (TAC) meeting was held on May 4, 2020. The TAC completed the following tasks:

  • Provide overview of completed Technical Memorandums
  • Address TAC members’ comments
  • TM 4.1 Summary of Findings & Comments 
  • TM 4.3 Summary of Findings & Comments


A stakeholder communication and engagement meeting was held March 14, 2019 at the EBMUD administrative building to:

  • Share completed milestones
  • Review the collaborative decision making process
  • Provide an Interbasin Working Group update
  • Discuss the Technical Advisory Committee Formation
  • Outline planned activities and gather stakeholder’s input

Today’s meeting agenda, sign-in sheet and presentation materials are now posted under Stakeholders Outreach section below.


EBMUD and the City of Hayward held a stakeholders meeting at the City of Hayward City Hall on February 27, 2018. The meeting materials are posted on this page.

EBMUD and the City of Hayward accepted written comments on the draft Stakeholder Communication and Engagement Plan. Comments can be submitted through mail or by 5 p.m. on March 30, 2018.

After completing public comment period, the Communications & Engagement Plan was finalized on April 23, 2018.

Stakeholders can also apply to participate on our Technical Advisory Committee.  Applications are due by April 30, 2018.  The application can be found here.

On May 7, 2018, DWR conditionally recommended funding in the amount of $1,000,000 for EBMUD and the City of Hayward to jointly develop a single Groundwater Sustainability Plan for the East Bay Plain Subbasin. This grant award is conditioned upon the execution of a Grant Agreement between DWR and EBMUD. 

Resource links 


Document Type Size
3/14/19 Stakeholders Meeting PDF <1 MB

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Learn more about EBMUD’s Groundwater Sustainability Agency
Contact: Ken Minn, Project Manager
Phone: 510-287-0668