Water meters are read from left to right in units of 100 cubic feet. Read only the first four numbers starting with the numbers on the far-left side of your meter.
For example, if the left four digits of your meter read 2590 and the prior meter read was 2580, this means you have used 10 units or 7,480 gallons of water. (1 unit = 100 cubic feet = 748 gallons.)
Note: A few meters are five-digit reads. If your last meter read was five digits, read the first five numbers starting with the numbers on the far-left side of your meter.