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24 <br />Based on population projections in the Metropolitan Council's 2040 regional development framework, <br />Thrive MSP 2040, the region's population is expected to increase by approximately 30% percent <br />above the 2010 figure, to approximately 3.6 million. During this same period, municipal water demand <br />is expected to increase by a similar amount and account for the majority of the increase in total <br />regional water demand. Figure 11 highlights the top ten growing cities by decade. <br />75% of the population future growth is expected to occur in communities with public water supply <br />systems supplied by groundwater; 11% in communities where public water supply systems supply <br />surface water; 12% in communities with a groundwater -surface water mix (Saint Paul Regional Water <br />Services, Edina and Bloomington, and Burnsville and Savage); and 2% of future growth is expected to <br />occur in communities supplied by individual wells. <br />Figure 11. Top ten growing cities in the Twin Cities metropolitan area, by decade. <br />in the 2000s: <br />in the 1990s: <br />2010 to 2040: <br />The impact of this population growth on water supply was estimated using a per capita unit use <br />calculation for municipal water utilities in the seven -county metropolitan area (Metropolitan Council, <br />2014c). Future water demand projections are obtained by multiplying future population projections by <br />the estimated per capita unit use: <br />(Projected Water Use) = (Projected Population) X (Per Capita Water Use) <br />WATER SUPPLY MASTER <br />PLAN- Draft June 2015 <br />