Per Capita Water Use is measured as gallons per person used per day (GPCD). This measure is simply the amount of water used every day for a given geography and use, divided by the number of people.
For Arizona, our GPCD for residential uses has fallen dramatically over the past two decades, especially in Phoenix. This decrease demonstrates the success of water conservation efforts, including the movement toward low-water landscaping alternatives. The GPCD measure allows us to manage our own water use and it also allows water planners and policy makers to compare our water use to other places across the country.
Per Capita Water Use is updated annually and is available for: