How much water does the San Diego region use every year? What’s the average per capita water use?
In 2006 the San Diego region used 687,253 acre-feet of water. (An acre-foot is roughly 326,000 gallons, or enough water to supply two average families for a year.) Per capita use varies widely depending on local climate, rainfall levels, residence characteristics and other factors. Overall, however, the average per capita Municipal and Industrial water in the Water Authority service area in 2006 was 173 gallons a day. If everyone takes the “20-Gallon Challenge,” we could conserve about 10 percent of our water use.
