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<br />Water Quality Impacts of Colorado River Deliveries <br /> <br /> <br />. Increases basin salinity <br />. Restricts groundwater <br />replenishment <br />. Restricts the use of <br />recycled water <br />. Causes adverse economic <br />impacts to water <br />consumers <br /> <br /> <br />. Increases basin perchlorate <br />. Restricts groundwater <br />replenishment <br />. Causes potential adverse <br />impacts to drinking water <br />quality as perchlorate. <br />regulations are developed. <br /> <br />Metropolitan Water District <br /> <br />. Regional Water Quality <br />Control Board Basin Plan <br />Objectives <br />. California Department of <br />Health Services secondary <br />Drinking Water Standard <br />. Metropolitan's salinity <br />objective. <br />. Customer acceptance <br /> <br />. New Federal <br />Environmental Protection <br />Agency water quality <br />standards pending (-2007). <br />. New California Department <br />of Health Services water <br />quality standards pending <br />(-2004) <br />. State Regional Water <br />Quality Control Board <br />Actions beginning to limit <br />perchlorate discharges. <br />. California Department of <br />Health Services secondary <br />drinking water standard. <br /> <br />. Reducing salinity requires <br />use of more State Water <br />Project water for blending. <br />. Increased State Water <br />Project water blending <br />requires accelerated <br />construction of alternative <br />disinfection process at <br />treatment facilities to meet <br />the Microbial! <br />Disinfection By-Products <br />Rule for State Water <br />Pro'ect water. <br /> <br />. Reducing perchlorate <br />requires use of more State <br />Water Project water for <br />blending. <br />. Increased State Water <br />Project water blending <br />requires accelerated <br />construction of alternative <br />disinfection process at <br />treatment facilities to meet <br />the Microbial! <br />Disinfection By-Products <br />Rule for State Water <br />Project water. <br />. Ability to meet low <br />perchlorate standard with <br />blending requires <br />aggressive cleanup of <br />perchlorate contamination <br />at Henderson, Nevada. <br />. Additional treatment <br />processes to remove <br />perchlorate may be <br />required. <br /> <br />April 29,2003 <br />