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<br />CDIVI <br /> <br />~ 200 <br />u <br />c.. <br />~ <br /> <br />~ 150 <br />::J <br /> <br />s.... <br />Q) <br />~ 100 <br />co <br />::::::s <br />c <br />c <br /><( <br /> <br />Application for the Water Conservation Grant Program, <br />Town of Erie <br /> <br />250 <br /> <br /> - - <br />- <br /> - <br />- - I---- <br />- I---- <br />- I---- <br /> I I I I <br /> <br />50 <br /> <br />o <br /> <br />2001 <br /> <br />2002 <br /> <br />2003 <br /> <br />2004 <br /> <br />2005 <br /> <br />Figure 3 Historical Per Capita Water Use <br /> <br />As shown in the equation below, per capita demands for the service area were <br />estimated by dividing potable system water demands by the total residential <br />population. This excludes non-potable uses such as irrigation of Vista Ridge Golf <br />Course, the Erie Commons development, open space and parks, reservoir storage, <br />and raw water transmission losses. <br /> <br />P -t d d Total potable water use (gal/day) <br />er cap. a eman s == <br />Total population x 365 days <br /> <br />Figure 4 shows the average water use by sector from 2001 to 2005. These data show <br />that residential households comprised 64 percent of Erie's total water consumption. <br />Unbilled water is the second highest consumptive use, at 15 percent. This includes <br />pipe leakage, unmetered water use, and meter error. Unmetered water is used for fire <br />fighting, street cleaning, sewer cleaning, and flushing. Construction uses and <br />commercial uses were the next highest water consumers, while parks and institutional <br />sectors represented the categories of least use. <br /> <br />\\densvrOl \projects\9228 - erie\conservation plan\grant application\water conservation grant progralTI application final.doc <br /> <br />4 <br />