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<br />Table 6. Subgroup Definitions <br /> <br />Water Use Audit Group Taps General Population Taps <br />gal/day <br /> Number Percentage Number Percentage <br /><115 72 14 2,923 24 <br />115 - 160 68 13 2,350 19 <br />160 - 195 58 11 1,752 14 <br />195 - 240 53 10 1,960 16 <br />240 - 280 100 19 1,235 10 <br />280 - 320 69 13 754 6 <br />320 - 800 100 19 1,432 12 <br />Total 520 100 12,406 100 <br /> <br />The predicted change in water use for the subgroups of the general population were <br />calculated using 19.9 percent as the average water reduction for the audit group and <br />the subgroup definitions. These numbers were used to compute an overall average <br />for the general population. The average is a predicted reduction in water use of 17.7 <br />percent, with 95 percent of the population expected to have a water savings between <br />14.5 and 20.9 percent. <br /> <br />Based on the results from the audit group, the above analysis indicates that 17.7 per- <br />cent reduction in water use could occur if the general population were to have retro- <br />fit devices installed. However, this result must be carefully used. Many variables <br />affect water use. While the analysis did reduce the number of variables by excluding <br />those homes that had a change in ownership during the analysis period, it does not <br />address many others. Such variables include a change in family size, change in water- <br />using appliances, a more conservative use of water due to raised awareness by hav- <br />ing the audit done and weather conditions. See Table 7 for estimated water savings <br />for the general population. <br /> <br />On December II, 1993, the City Focus advertisement featured an article as a follow- <br />up to the grant project. Called, Water Conservation for your Home, the article re- <br />ported the results of the retrofit project and outlined ways homeowners could <br />perform their own water use assessment and retrofit. (Attachment N). <br /> <br />11 <br />