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Section 2 <br />REDUCED RELIANCE ANALYSIS <br /> Zone 7 Water Agency <br /> Reduce Reliance on the Delta <br /> 3 DRAFT | April 2026 <br />• Non-Potable Water Demands – This item includes untreated water demands, raw water losses, <br />and water placed in storage. <br />• Water Supplies Contributing to Regional Self-Reliance <br />— Water Use Efficiency – This amount is calculated by DWR’s spreadsheet tool based on <br />Zone 7’s baseline demand, actual demands, and expected future demands. The value <br />shown is the reduction in per capita water demand from the baseline (2010) multiplied <br />by the projected population for each. Because the Tri-Valley has successfully reduced <br />potable water demands over time, conserved water is contributing significantly to <br />Zone 7’s regional self-reliance. <br />— Conjunctive Use Projects – Zone 7’s use of operational storage in the Main Basin is <br />included here. The Main Basin is recharged with SWP water and local Arroyo Valle water. <br />This water is locally available for use during normal operations, drought, and <br />emergencies. <br />— Local and Regional Water Supply and Storage Projects – This includes actual use and <br />future projected use of local Arroyo Valle water. <br />— Other Programs and Projects that Contribute to Regional Self-Reliance – As discussed in <br />Chapter 6 of the 2025 UWMP, Zone 7 has included Sites Reservoir (2,185 acre-feet per <br />year [AFY] of average yield) as a representative future supply. As stated in a letter from <br />the Delta Stewardship Council to the Sites Project Authority on May 2, 2018, “Sites <br />Reservoir would be located upstream from the Delta, outside the legal Delta boundary” <br />and “does not meet the definition of a covered action”; consequently, Sites Reservoir has <br />been categorized as a water supply contributing to regional self-reliance. <br />• Water Supplies from the Delta Watershed <br />— CVP/SWP Contract Supplies – Zone 7 derives a large portion of its supplies from the SWP <br />system, as reflected in the analysis. <br />— Other Water Supplies from the Delta Watershed – SWP carryover water and actual <br />recovered water from the Kern County groundwater banks delivered through the Delta <br />have been included here. Note that future projections do not include water from the <br />banks because that supply is not part of normal year operations.