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<br />Residential Surveys <br /> <br />Description <br /> <br />The water utility identifies residential customers who use the most water and targets them <br />for water use surveys or audits. Direct contact is made by phone or mail to offer an audit. <br />Residential surveys should include: checks for leaks on the property at the meter, faucets, <br />toilets and other fixtures; checks for toilet flush volumes as well as flow rates of <br />showerheads and faucet aerators; replacement of showerheads and faucet aerators with <br />water saving devices; and recommendations for water-conserving irrigation scheduling. <br /> <br />Water Savings <br /> <br />A recent study found that water savings from residential surveys would be about 10 <br />gallons per capita per day (gpcd) for indoor uses. Reduction in irrigation use was <br />estimated at 10 percent.s Savings like these can be achieved by auditing high-volume <br />water users who consume 25 percent more water than average customers. <br /> <br />Residential Ultra Low Flush Toilet Retrofit Program <br /> <br />Description <br /> <br />This retrofit program encourages homeowners to replace conventional toilets with ultra- <br />low flush (ULF) models. Conventional toilets deliver between 3.5 to 7 gallons per flush. <br />In 1992, federal law set the standard for new toilets at 1.6 gallons per flush. <br /> <br />Water Savings from ULF Retrofits <br /> <br />Water savings from ULF toilet replacements have been well documented in the <br />Residential End Uses of Water Study (Mayer and DeOreo, 1999). The study found that <br />homes with conventional toilets used approximately 56 gallons per household per day <br />(gphd) for flushing purposes. Homes exclusively using 1.6 gallons per flush fixtures <br />used 27 gphd. These data suggest a savings in a typical single family residence of29 <br />gphd or approximately 10,600 gallons per year. <br /> <br />Residential Plumbing Retrofits <br /> <br />Description <br /> <br />This is considered the "classic" water conservation program in which non-efficient <br />showerheads and faucet aerators are replaced with new low-flow models, and toilet darns <br />are fitted into toilet tanks to reduce flush volumes. In order to implement this practice, a <br />utility targets residential homes for retrofits, and at least 10 percent of the target group is <br />refit each year. <br /> <br />s Memorandum o/Understanding Regarding Urban Water Conservation in California, California Urban <br />Water Council, Amended September 16,1999. pg. 17. <br /> <br />12 <br />