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Reduced Reliance on the Delta
<br />• Water Supplies Contributing to Regional Self -Reliance
<br />THE CITY OF
<br />rL£ASANTON®
<br />Water Use Efficiency -This amount is calculated by DWR's spreadsheet tool based on the
<br />City's baseline demand, actual demands, and expected future demands. The value shown
<br />is the reduction in per capita water demand from the baseline (2010) multiplied by the
<br />projected population for each. Because the City has successfully reduced per capita
<br />potable water demands over time, water use efficiency contributes significantly to the
<br />City's regional self-reliance.
<br />Water Recycling - The City substantially completed construction of its recycled water
<br />distribution system in 2016. Recycled water contributes to regional self-reliance by
<br />reducing the demand for potable water.
<br />Conjunctive Use Projects -The City pumps groundwater as part of its normal water supply
<br />portfolio. By agreement with Zone 7, the City can pump up to 3,500 acre-feet per year
<br />(AFY) from the local groundwater basin (Main Basin). If the City pumps less than
<br />3,500 acre-feet (AF) in a year, it can carry over up to 700 AF of pumping capacity to the
<br />following year.
<br />• Water Supplies from the Delta Watershed
<br />• CVP/SWP Contract Supplies - Some of Zone 7's water supplies are from the Delta
<br />watershed. Since the City purchases treated water from Zone 7, a portion of the City's
<br />supplies therefore originated in the Delta watershed. To estimate this portion, it was
<br />assumed the composition of Zone 7's deliveries to the City in a gIu .,. , :, would mirror that
<br />of Zone 7's overall supply portfolio for that same year. For example, in 2020 approximately
<br />63 percent of Zone 7's supplies were from the Delta watershed. Therefore, it was assumed
<br />63 percent of Zone 7's 2020 deliveries to the City were from the Delta watershed.
<br />Table 1. Calculation of Water Use Efficiency (DWR Table C-1)
<br />Service Area Water Use Efficiency
<br />Demands
<br />(Acre -Feet)
<br />Baseline
<br />(2010)
<br />2015
<br />2020
<br />2025
<br />2030
<br />2035
<br />2040
<br />2045
<br />(Optional)
<br />159
<br />173
<br />Service Area Water Demands with Water
<br />165
<br />161
<br />161
<br />Per Capita Water Use (GPCD) 208
<br />Change in Per Capita Water Use from
<br />Use Efficiency Accounted For
<br />16,131
<br />11,459
<br />16,007
<br />18,240
<br />18,889
<br />19,387
<br />20,036
<br />20,036
<br />104
<br />Notable Water Demands
<br />-
<br />1,228
<br />1 1,500
<br />1,650
<br />1,650
<br />1,800
<br />1,800
<br />Estimated Water Use Eff i ci e n cy S i n ce
<br />Baseline
<br />5,352
<br />Potable Service Area Demands with Water
<br />Use Efficiency Accounted For
<br />16,131
<br />11,355
<br />14,779
<br />16,740
<br />17,239
<br />17,737
<br />18,236
<br />18,236
<br />Total Service Area Population
<br />Baseline
<br />2010
<br />( )
<br />2015
<br />2020
<br />2025
<br />2030
<br />2035
<br />2040
<br />2045
<br />(Optional)
<br />69,300
<br />Service Area Population
<br />71,776
<br />82,977
<br />86,326
<br />91,430
<br />96,171
<br />100,913
<br />100,913
<br />Water Use Efficiency Since Baseline Baseline
<br />(Acre -Feet) (2010)
<br />2015
<br />2020
<br />2025
<br />2030
<br />2035
<br />2040
<br />2045
<br />(Optional)
<br />141
<br />159
<br />173
<br />168
<br />165
<br />161
<br />161
<br />Per Capita Water Use (GPCD) 208
<br />Change in Per Capita Water Use from
<br />Baseline (GPCD)
<br />(67)
<br />(49)
<br />(35)
<br />(39)
<br />(43)
<br />(46)
<br />(46)
<br />Estimated Water Use Eff i ci e n cy S i n ce
<br />Baseline
<br />5,352
<br />4,536
<br />3,354
<br />4,044
<br />4,649
<br />5,254
<br />5,254
<br />3
<br />City of Pleasanton
<br />Last Revised: 05-05-21
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