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Water Conservation Plan SECTION 7 INTEGRATION OF RESOURCES AND MODIFICATION OF FORECASTS Section 7 focuses on modifying water demand and supply capacity forecasts to reflect the anticipated effects of conservation. The measures and programs are evaluated to determine whether and how water savings from conservation will allow the Authority to eliminate, downsize, or postpone new facilities and water rights acquisitions. 7.1 DEMAND FORECASTS MODIFICATIONS The demand forecasts that were presented in W orl(sheet 2-1 were modified to reflect changes based on the introduction of the proposed conservation measures that were selected in Section 6. These modifications are presented in Worl(sheet 7-1 (Appendix A). Table 7-1 summarizes the expected water savings from the chosen future measures and programs and the current conservation activities of ACWW A. The water demand would not be more significantly reduced by implementing this Water Conservation Plan since the Authority had previously implemented many water conservation measures and programs. They include: . Metered water services and tiered volumetric water rate structures designed to encourage water use efficiency . V o I untary watering schedules . Leal( detection program . Customer water conservation education program . Mandatory use of water efficient fixtures in all new development . Existing reuse program with planned expansion of non-potable water system T bl 7 1 S fC t d F t W t S a e . : ummary 0 urren an u ure a er aVln~s CURRENT WATER FUTURE WATER SA VINGS SA VINGS AT BUILD OUT A verage Day Demand 30% (estimated) 5.4% Peak Day Demand - 0.6% Annual Demand 30% / 1,330 acre-ft (estimated) 5.4% / 249 acre-ft The conservation measures and programs that ACWW A currently follows, and has identified for the future within this report, are all possible to implement within the Authority's financial, legal and operational capabilities. Additional measures and programs are not possible to implement due to practical limitations. Although the Authority would meet its goal of a reduction of water use by 5%, the Authority would evaluate additional reductions in average day water demand by further modifying rate structures (i.e. Irvine Ranch Model). November 2006 27 Richard P. Arber Associates, Inc.