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The Future: <br />Conservation Potential <br />.................................................................................................................................... <br />Substantial indoor and outdoor conservation potential exists in the <br />single-family sector. With 100 percent occurrence of higher efficiency <br />devices, indoor household water use could drop 35 percent or more, <br />to below 40 gallons per capita per day. Aggressive outdoor water <br />conservation could reduce outdoor use even further. <br />.................................................................................................................................... <br />More efficient appliances and fixtures have contributed to significant reductions in residential indoor water <br />use, but there remains much potential for additional savings. In REU2016, more than half of residences did <br />not meet the study's efficiency criteria for clothes washers and toilets, and 20 percent did not meet those <br />standards for showers (see Figure 6). In addition, households that currently over -irrigate could change their <br />habits and substantially reduce their outdoor use. <br />Figure 6. Percent of homes meeting efficiency criteria, REU1999 and REU2016 <br />Efficiency criteria include: clothes washers <30 gal/load, toilets <2.2 gal/flush, showers <2.5 gal/minute. <br />Clothes 60% <br />washer <br />Toilet <br />Shower <br />5% <br />0 10% 20% <br />3U% <br />10 1 RESIDENTIAL END USESOF WATER, VERSION 2: EXECUTIVE REPORT <br />4E% <br />37% <br />REU1999 <br />REU2016 <br />75d/o <br />80% <br />40% 50% 60% 70% 80% <br />96% <br />