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<br />GILCRBS'l MBU I.DOOR WAtZR U8E. WI.orBR 1992-93 VB. 1993-9. <br />Group House- 1992-93 1993-94 Decrease 95 Pereen~ <br /> holds Gallons Gallons Gallons Confidence <br /> . /1. 000 I /1. 000 I 11.000) Interval <br />Devices-Ins~alled 169 24.43 17.14 7.28 ..82 9.75 <br />Devices-Drop Off 30 18.70 17.23 1. 43 -4.59 7.45 <br />110 DeVices 21 22.62 18.71 3.90 -0.47 8.28 <br />TOTALS 220 23.47 17.31 6.16 4.07 8.26 <br /> <br />'Iou, SOil hlullkold. wUeh rmhtd dnleu ,eu ellllnmd frol the .tatiltlell nalf.lI heelOll of <br />Illperltl'e vlter Ilterl, Ir I ehlDge of teDlaef durlag the etudJ. <br /> <br />The Devices tnstalled group had the greatest water uae the first <br />vinter and the greatest decrease the second winter of 7,280 gallons <br />on average or a 30' reduction. The group without devices reduced <br />their water use by 17\. The group who request.ed to install the <br />devices themselves had only an 8\ decrease in water use from one <br />year to the next. This group had the lowest average water use the <br />first winter, vhich .ay account for the smaller decrease. <br /> <br />Using an analysis of variance, the three groups did not differ frOD <br />each other significantly in water use during each of the winters. <br />nor in their decrease in water use. The 95' confidence intervals <br />show that the Device Installed group had a significant decrease in <br />water use and that the Total group had a Significant decrease in <br />water use between the two winters. <br /> <br />Although the three groups seesed to differ in their decreased Water <br />use (7.28. 1.43, 3.901, with the large variabili~y within the three <br />groups and the relatively small Drop ort and 10 Device group sample <br />eize, the differences were not statistically significant. <br /> <br />Tbe results of tbe anelyais indicate that there were significant <br />reductions in water use from one winter to the next but no <br />statistical difference in tbe amounts conserved between those with <br />and without the conservation devices. The data for individual <br />bousebolds showed tbe largest water users the first winter had the <br />greatest conservation during the second winter, as would be <br />expected. The data alao indicate that all households are leveling <br />out in their winter water use to an average of approximately 5,700 <br />gallons per household per sonth. <br /> <br />A second method of analYZing the results is to review monthly <br />wastewater tlow rates trom one year to the next. Tbe table below <br />shows the amount of wastewater treated by the Town's system during <br />the winter months. <br /> <br />c:::, <br />