An acre foot of water is equal to 325,851 gallons.
That is the amount of water it takes to cover one acre of land with one foot of water.
How much water does the average household use? According to the Arizona Department of Water Resources (ADWR) each Arizona resident consumes an average of 146 gallons of water per day. At a rate of 146 gallons per day it would take over 6 years for the average residential user to consume an acre foot of water.