Groundwater Sustainability Agency Update and Bulletin 118 Boundary

Groundwater Sustainability Agency Update and Bulletin 118 Boundary Modification Kelley Gage Brian Powell, P. E. June 18, 2018 | emwd. org

Sustainable Groundwater Management Act • The Sustainable Groundwater Management Act (SGMA) was signed into law on September 16, 2014 SWRCB Enforcing Agency – Purpose of SGMA: Sustainable management of groundwater in a manner that does not cause undesirable results • SGMA grants new and additional groundwater management authorities to Groundwater Sustainability Agencies (GSA) • Eastern Municipal Water District (EMWD) became the GSA for the West San Jacinto Basin and Southwest San Timoteo Groundwater Basins in 2017 2 | emwd. org DWR Regulating and Assisting Agency GSA and Stakeholders Planning and Implementation Agency

Bulletin 118 and the Sustainable Groundwater Management Act • Existing groundwater basin boundaries are defined in DWR’s Bulletin 118 California's Groundwater • The San Jacinto Groundwater Basin, as defined in Bulletin 118 (Basin No. 8 -005), is a “high priority” basin • The San Timoteo Groundwater Basin, as defined in Bulletin 118 (Basin No. 8 -02. 08), has recently been assigned as a “very low priority” basin • SGMA established a process for local agencies to revise the boundaries of an existing Bulletin 118 basin to better represent the local groundwater aquifer • EMWD is proposing to submit Bulletin 118 Boundary modifications for the San Jacinto and San Timoteo Basins 3 | emwd. org

SGMA Timeline Sept 16, 2014 SGMA signed into law DWR’s first round of Basin Boundary Modifications Jun/Jul 2018 DWR’s second round of Basin Boundary Modifications and GSAs initiate development of GSPs 4 | emwd. org June 1, 2016 Jan 1, 2016 DWR adopts regulations for evaluating Groundwater Sustainability Plans (GSP) Jan 31, 2022 GSPs due for High-priority (but not critically over-drafted) basins (San Jacinto Basin) June 30, 2017 GSAs formed Jan 31, 2042 High priority basins achieve groundwater sustainability (20 years after GSP is adopted)

Existing San Jacinto and San Timoteo Bulletin 118 Groundwater Basin Boundaries 5 | emwd. org

San Jacinto Basin – Stakeholder Involvement • As required by SGMA, EMWD invited stakeholders to a workshop to discuss EMWD’s proposed Bulletin 118 Boundary Modification and GSP preparation for the West San Jacinto Basin • Stakeholders to the West San Jacinto GSA area and to the Watermaster area were invited to a workshop that was held on May 31, 2018 • Three stakeholders and one staff member from DWR attended • All supported EMWD’s proposed actions 6 | emwd. org

San Jacinto Groundwater Bulletin 118 Boundary Modification Preliminary Basin Boundary Adjustment Areas 7 | emwd. org

San Jacinto Groundwater Bulletin 118 Boundary Modification Proposed San Jacinto Basin Boundary EMWD’s Proposal: Develop and submit the Basin 8 -005 Boundary Modification to the Department of Water Resources by the June 30, 2018 deadline 8 | emwd. org

Southwest San Timoteo Groundwater Basin Bulletin 118 Proposed Boundary Modifications • Proposed Southwest San Timoteo Subbasin boundary modifications will provide better alignment with aquifer • Coordination on boundary modifications with subbasin stakeholders and DWR on-going • Revised boundary may result in EMWD no longer being GSA in the San Timoteo Subbasin • Preparation of a GSP for the San Timoteo Subbasin is not anticipated due to “very low priority” ranking 9 | emwd. org

San Timoteo Groundwater Bulletin 118 Boundary Modification Proposed San Timoteo Subbasin Boundary EMWD’s Proposal: Develop and submit the Subbasin 8 -02. 08 Boundary Modification to the Department of Water Resources by the June 30, 2018 deadline 10 | emwd. org

Groundwater Sustainability Plan Approach for the West San Jacinto Basin Covered by the GSA • Management of the West San Jacinto Basin is currently performed by EMWD under an AB -3030 Management Plan • SGMA requires that medium and high priority basins be managed under a GSP • Because the West San Jacinto Basin is a high priority basin (but is not critically over-drafted) the deadline for submittal of the GSP is January 30, 2022 • The AB-3030 Management Plan will be updated with criteria identified in SGMA to comply with the GSP requirements 11 | emwd. org

Next Steps Bulletin 118 Boundary Modifications for the San Jacinto and San Timoteo Groundwater Basins • Submit the proposed modification to DWR by the June 30, 2018 deadline – Includes supporting scientific justification for the proposed modifications • After acceptance by DWR, submit revised boundaries for the GSA areas of each basin, to reconcile any remaining differences – For the Southwest San Timoteo Basin, EMWD’s GSA area may be eliminated completely GSP for the West San Jacinto Groundwater Basin • Release an RFP to consultants to assist with the development of the GSP • Request Board approval for the selection of a consultant • Prepare and submit the GSP to DWR by the January 30, 2022 deadline 12 | emwd. org

Recommendation Adopt the proposed Resolutions which authorize the General Manager, and/or his designee, to prepare the necessary data, conduct investigations, and file such applications with the California Department of Water Resources to modify the boundaries of the San Jacinto Basin and San Timoteo Subbasin as defined in Bulletin 118. 13 | emwd. org

Contact Information Kelley Gage Senior Director of Water Resources Planning (951) 928 -3777 Ext. 4561 Brian Powell, P. E. Director of Groundwater Management and Facilities Planning (951) 928 -3777 Ext. 4278 Email: gagek@emwd. org Email: powellb@emwd. org 14 | emwd. org