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6 <br />Moving Toward water Sustainability: Outcomes <br />Introduction <br />The Master Water Supply Plan's goal is a sustainable water supply for the region, which supports the <br />broader regional vision of moving toward sustainability described in Thrive MSP 2040. <br />This chapter identifies some measureable outcomes that can be tracked to monitor progress toward <br />the goal of sustainability. These outcomes will help reduce the water supply issues identified in <br />Chapter 5. <br />Sustainable water use <br />This Master Water Supply Plan has a single overarching goal: The region's water supply is sustainable <br />now and in the future. The region's water supplies will be considered sufficient and sustainable when: <br />• Sustainable amounts of groundwater are planned and use <br />• Demand exceeding sustainable groundwater withdrawal rates is supplied by the most feasible <br />combination of conservation, surface water, reclaimed wastewater and stormwater reuse <br />• Legislative changes are made that align agency directions on all aspects of water supply <br />Regional groundwater modeling indicates that the maximum amount of groundwater that can be <br />sustainably withdrawn in the region, if pumping is expanded in areas near existing high capacity wells, <br />is approximately 400-500 million gallons per day. Subregional and local hydrogeologic conditions <br />affect the amount of groundwater that can be withdrawn in different parts of the metropolitan area. <br />Table 1 summarizes the subregional estimates of sustainable groundwater withdrawal rates. Demand <br />above these rates may require new investments - either exploration of new well fields and expanded <br />distribution or development of new sources and/or more aggressive water conservation. <br />WATER SUPPLY MASTER <br />PLAN- Draft June 2015 <br />