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38 <br />currently operates eight wastewater treatment plants, with an average flow of 250 million gallons per <br />day. The design capacity of these plants if 358 million gallons per day. Planned 2040 system capacity <br />is 372 million gallons per day and long term (beyond 2040) is 500 million gallons per day. <br />The effluent quality and level of treatment varies among the existing wastewater treatment plants. <br />Additional treatment would generally be needed to match reclaimed water quality requirements. <br />Cost is a key factor in evaluating the feasibility of wastewater reuse. In 2014, Metropolitan Council <br />evaluated reclaimed water demand, water quality needs, and estimated costs in the Southeast Metro. <br />Potential users included in a possible reuse scenario included Flint Hills Refinery, residential and <br />commercial toilet flushing and irrigation in areas of growth between 2010 and 2040, and agricultural <br />irrigation north of and east of the Empire Wastewater Treatment Plant. The treatment and distribution <br />system incremental costs (above the existing treatment) to provide reclaimed water ranged frm $5 to <br />$10 per 1,000 gallons. Key factors driving costs are treatment requirements, distribution costs, and <br />seasonality of use. <br />Estimated amount of water available to the metro area <br />Considering that the metro area has access to water from several sources including stormwater, <br />reclaimed wastewater, surface water and groundwater and based on our current understanding of <br />water supply sustainability, the region can sustainably access about 4 billion gallons per day. <br />Although the region generally has enough water to meet current and future demand from all available <br />sources, each source is limited and is vulnerable to a variety of factors. The only single source capable <br />of supplying the region's demand is surface water, which is also the most vulnerable to drought and <br />contamination. <br />Figure 17. Comparison of historical and projected needs versus sustainable sources. <br />1000 <br />3,000 <br />21)00 <br />MOO <br />Jr <br />WATER SUPPLY MASTER <br />PLAN- Draft June 2015 <br />1 <br />1 .COG <br />aoo <br />(718 600 esbowidinso <br />2L 7.0Q <br />.ruo <br />8 BOO <br />t <br />a <br />oaaE Grp <br />rs <br />aomrepar <br />mhistivor <br />l *[ 'ef&LO•r i>&,esserealHeads. <br />▪ Wass0Rar' ,k,arar#kr SalMeedS <br />- Capcmov <br />,Pur.01ruemara •mean Etroge <br />hutalithr Cerro Olt &frue[114 <br />kauiNar rovra PO Wrote <br />