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Figure 1. Indoor household use by fixture <br />*The "Other` category includes evaporative cooling, humidification, water softening, and other uncategorized indoor uses. <br />Indoor Use <br />Toilet flushing is the largest indoor use of water in single-family homes, followed by faucets, showers, clothes <br />washers, leaks, bathtubs, other/miscellaneous, and dishwashers (see Figure 1). <br />Mandated reductions in toilet flush and clothes washer volumes and shower and faucet flow rates have <br />contributed to the declines in residential water use. REU2016 showed indoor water use at 138 gallons <br />per household per day (gphd). A sample of new homes built according to EPSs WaterSense New Home <br />Specification Version 1.0 had an average daily per household water use of 110 gphd (DeOreo et al. 20112). <br />Hot Water <br />In a sub -sample of 94 homes, the average <br />household hot water use was 45.5 gphd, <br />which accounted for 33.2% of total indoor <br />water use. Showers and faucets each <br />consumed substantially more hot water <br />than all the other end uses combined. For <br />showers, the average daily household hot <br />water use was 17.8 gallons, and for faucets, <br />15.4 gallons. <br />Table 1. Average daily hot water use per household <br />Shower <br />39.1% <br />17.8 gphd <br />Faucet <br />33.8% <br />15.4 gphd <br />S <br />W <br />4.4 gphd <br />Bath <br />sss� <br />2.6 gphd <br />�� <br />4.8% <br />2.2 gphd <br />Leak <br />4.6% <br />2.1 gphd <br />ssss <br />2.0% <br />0.9 gphd <br />Toilet <br />0% <br />_ <br />Toilet <br />Faucet <br />Shower <br />Clothes washer <br />Leak <br />Bath <br />Other* <br />Dishwasher <br />24% <br />20% <br />20% <br />16% <br />13% <br />3% <br />3% <br />2% <br />32.6 gphd <br />27.0 gphd <br />26.9 gphd <br />22.0 gphd <br />17.8 gphd <br />4.4 gphd <br />4.0 gphd <br />2.2 gphd <br />*The "Other` category includes evaporative cooling, humidification, water softening, and other uncategorized indoor uses. <br />Indoor Use <br />Toilet flushing is the largest indoor use of water in single-family homes, followed by faucets, showers, clothes <br />washers, leaks, bathtubs, other/miscellaneous, and dishwashers (see Figure 1). <br />Mandated reductions in toilet flush and clothes washer volumes and shower and faucet flow rates have <br />contributed to the declines in residential water use. REU2016 showed indoor water use at 138 gallons <br />per household per day (gphd). A sample of new homes built according to EPSs WaterSense New Home <br />Specification Version 1.0 had an average daily per household water use of 110 gphd (DeOreo et al. 20112). <br />Hot Water <br />In a sub -sample of 94 homes, the average <br />household hot water use was 45.5 gphd, <br />which accounted for 33.2% of total indoor <br />water use. Showers and faucets each <br />consumed substantially more hot water <br />than all the other end uses combined. For <br />showers, the average daily household hot <br />water use was 17.8 gallons, and for faucets, <br />15.4 gallons. <br />Table 1. Average daily hot water use per household <br />Shower <br />39.1% <br />17.8 gphd <br />Faucet <br />33.8% <br />15.4 gphd <br />Clothes washer <br />9.7% <br />4.4 gphd <br />Bath <br />5.7% <br />2.6 gphd <br />Dishwasher <br />4.8% <br />2.2 gphd <br />Leak <br />4.6% <br />2.1 gphd <br />Other <br />2.0% <br />0.9 gphd <br />Toilet <br />0% <br />0.0 gphd <br />Total <br />45.5 gphd <br />'Nearly 100 percent of the 25 new homes studied in DeOreo etal. 2011 met the following efficiency criteria: clothes washers with ca- <br />pacities of s30 gallons per load (gpl), shower flow rates s2.5 gallons per minute (gpm), and toilet flushes s 2.0 gallons per flush (gpf). <br />RESIDENTIAL END USESOF WATER, VERSION 2: EXECUTIVE REPORT 1 5 <br />