14 ATTACHMENT 1 EXHIBIT B - Laserfiche WebLink

Reduced Reliance on the Delta THE CITY OF rLEASANTON. (C) Included in the Plan, commencing in 2015, the expected outcome for measurable reduction in Delta reliance and improvement in regional self-reliance. The expected outcome for measurable reduction in Delta reliance and improvement in regional self-reliance shall be reported in the Plan as the reduction in the amount of water used, or in the percentage of water used, from the Delta watershed. For the purposes of reporting, water efficiency is considered a new source of water supply, consistent with Water Code section 1011(a). The analysis and documentation provided below include all of the elements described in WR P1(c)(1) that need to be included in a water supplier's UWMP to support a certification of consistency for a future covered action. The inclusion of this document as an appendix in the 2015 and 2020 Urban Water Management Plans fulfills the requirements of WR P1 subsection (c)(1) Paragraph A. Future projects under evaluation as described in Chapter 6 and the demand management measures described in Chapter 9 of the 2020 UWMP fulfill the requirements of WR P1 subsection (c)(1) Paragraph B. 2.0 REDUCED RELIANCE ANALYSIS The methodology used to determine the City reduced Delta reliance and improved regional self-reliance is consistent with the approach detailed by the California Department of Water Resources (DWR) in Appendix C of their "2020 Urban Water Management Plans Guidebook for Urban Water Suppliers" (DWR Guidebook), issued in March 2021. The following analysis uses narrative justifications to account for supplies and document specific data sources. All data were obtained from the 2020 UWMP or previously adopted UWMPs and represent average or normal water year conditions. The analysis was conducted at the retail level, focusing on the City's demands and available supplies (i.e., groundwater and purchases from Zone 7). Table 1 through Table 4 present the analysis of the City's reduced Delta reliance using DWR's spreadsheet tool and fulfill the requirements of WR P1 subsection (c)(1) Paragraph C. Descriptions of the various inputs of the analysis are provided below: Baseline (2010) and 2015-2045 Conditions—The analysis uses a normal water year representation of 2010 as the baseline, which is consistent with the approach described in the DWR Guidebook. Data for the City's 2010 baseline are taken from its 2010 UWMP, while actual conditions for 2015 and 2020 are based on data reported in the City's 2015 and 2020 UWMPs, respectively. Normal year projections for 2025 through 2045 are also based on the City's 2020 UWMP. • Service Area Water Demands with Water Use Efficiency Accounted For — These values reflect the City's actual and projected water use, including potable water demands, recycled water demands, and losses. • Non -Potable Water Demands — These values consist of recycled water demands. City of Pleasanton Last Revised: 05-05-21