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Figure 8. Relative volumes of water used by metro area communities for the period 2003-2012 for residential (blue), industrial <br />(green) and commercial (purple) uses. (darker colors indicate higher use) <br />Residential <br />Residential water use is the largest category of municipal water use in the metropolitan area, and is <br />the highest priority water use. Between 2003 and 2012, approximately 63% of municipal water was <br />used by residents for drinking and cooking, bathrooms and laundry, and for outdoor uses like lawn <br />watering. During the 2003-2012 time period, metropolitan area residents each used an average of <br />about 94 gallons per day for residential purposes. However, this amount varied from community to <br />community and from summer to winter. In some communities, summer water use is more than three <br />times that of winter water use, while other communities use water more evenly throughout the year. As <br />a region, approximately 23% of residential water is used outdoors, mostly for irrigation. <br />Figure 9. Estimated percent of residential water consumption by type of use, metro area, 2003-2012. <br />Indoor: <br />Clothes <br />Washer <br />17% <br />Indoor: <br />Faucets <br />1 2% <br />Indoor: <br />Leaks: <br />10% <br />Indoor: tithe r <br />4% <br />While domestic water use is the State's first priority, this is generally assumed to mean indoor use. <br />Outdoor water use is considered nonessential use and the first to be curtailed during an emergency, <br />although enforcement is challenging because this use is distributed among so many people and <br />locations. <br />Commercial <br />WATER SUPPLY MASTER <br />PLAN- Draft June 2015 <br />