To read a typical water meter, simply read across the numbers in the box. The current reading for the sample meter here is 0369200 gallons. Some meters have only six digits instead of seven, but they are read exactly the same way. The 0 on the far right is a fixed number and never changes. Each number on the round dial represents one gallon, so from 0 to 1 is one gallon, 1 to 2 is one gallon, etc. One complete turn of the red needle is 10 gallons.