Gallons per capita per day (GPCD) is a method utilized internationally to measure water use by drinking water suppliers. It is most commonly used to describe historical and current water uses, providing a baseline of water use that is not as susceptible to changes in population. GPCD is also used for planning purposes, allowing estimates of future demand requirements based on localized population projections. More sophisticated planning efforts utilize GPCD to determine conservation potential, track the results of program implementation, and calculate projections based on conservation adjusted GPCD.
Annual GPCD = (Total Gallons in System ÷ Permanent Population) ÷ 365. A 5-year average is used to account for weather variances
MEASURE ARCHIVED AND REPLACED BY THE 5 YEAR ROLLING AVERAGE FIGURE BEGINNING IN FY19