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ATTACHMENT 1 Policies for Sustainable Water Supplies 1. While accounting for population growth and the uncertainty brought about by climate change, increase reliability and decrease variability: 85% deliveries once every 10 years and 70% deliveries once every 30 years. This is equivalent to a 97.5% average annual reliability. • The goal is to meet or exceed water demand on a regular basis while minimizing water supply shortfalls when they occur. 2. Actively promote water conservation for residential, commercial, irrigation, and institutional customers, with a long-term goal of a system-wide annual potable use below the water use target pursuant to the corresponding year's State reported gallons per capita per day target. 3. Diversify the sources of water supply to reduce dependence on imported water from outside the region (e.g., the Sacramento-San Joaquin Delta) and on any one water source. 4. Not exceed the City's annualized average groundwater pumping quota of 3,500 AFA from the Livermore Valley Main Groundwater Basin. 5. Work with the City's partners (e.g., DERWA) to maximize potable and/or non-potable reuse of the City's wastewater. • Except for brine production during the process, the goal is 100% recycling of wastewater generated in the City for beneficial reuse. 6. Maximize the emergency recovery ability of the water supply portfolio. • The goal is to ensure continuing supply of water or to minimize water supply shortfalls to customers during emergency situations including a major pipeline break, supply contamination, or interruption of deliveries due to earthquake, flood, or other disaster. Consider, for example, the availability or ease of building redundancy in conveyance for each water supply source. 7. Maintain the safety and quality of the City's water supply as defined by adopted State and Federal regulations while working towards reducing water hardness. 8. Avoid and/or mitigate environmental impacts during a water supply's life cycle. 9. Ensure that costs to the City's rate payers for implementing water supply initiatives are acceptable. • Collaborate with project partners and seek funding opportunities. 10. Ensure that the ultimate beneficiaries of the water supply equitably participate in the funding of the costs associated with the acquisition and delivery of the water supply into the City's service area. New planned developments should realize water supply without burdening existing customers. • The City should consider making appropriate water rate adjustments to support these water supply initiatives.