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• A regional conjunctive use WTP has the advantages of being a cost effective approach, increases <br /> groundwater sustainability, provides mostly softened water, reduces chloride discharges to the <br /> Mississippi River, and does not rely on one water source. The disadvantages of a regional <br /> conjunctive use WTP is that it changes water taste and odor and does not provide fully softened <br /> water in the summer. <br /> • Constructing individual lime softening groundwater WTPs (Status Quo) has the advantages of <br /> providing fully softened water and reduces chloride discharges to the Mississippi River. The <br /> disadvantages of individual lime softening WTPs is that it is the most expensive approach and relies <br /> on one water source. <br /> • A cost of service example indicates that grant funding will be an integral part of implementing a <br /> regional surface water supply system to make the project viable. <br /> • In the absence of a project driver, Northwest Metro cities are likely to continue to utilize <br /> groundwater and construct iron and manganese removal water treatment plants. At this point, none <br /> of the Northwest Metro cities have water treatment plants, although 2 are in the planning stages <br /> (Ramsey and Corcoran). <br /> • The Northwest Metro communities are embarking on this study at an optimal time. The water <br /> systems are not fully developed and significant growth is planned. <br /> Page—ES-8 I METROPOLITAN COUNCIL <br />