Reading a water meter is similar to reading an automobile odometer. Most meters have a seven-digit number on the face called the readout (see illustration). This shows the total of gallons used since the meter was installed. When water passes through the meter, all of the numbers revolve, except the last one on the right, which is fixed at zero. The large sweep hand registers for this last increment - revolving one time for every ten gallons used. If you have a meter that reeds in cubic feet, one revolution of the sweep hand is equal to 7.78 gallons. The last number is not fixed in place.Figure Your Water Use
To calculate your water use, pick a starting point at which to read your meter; record the reading and date. A day or two later, read your meter again. Subtract the first reading from the second to find out how much water was used. For example:

Monitor Your Water Use
Read your meter on a regular basis to track water use. Keep a record of all readings. You will be able to detect trends from season to season and year to year. If your household changes in any way that affects water use (e.g., new family member, plumbing upgrade, etc.), you will be able to determine the effect of the change.   Locate your Meter
The water meter is usually located near the curb in front of the house or business. It is in the ground, housed in a concrete or plastic box. Carefully remove the meter box lid using a tool such as a large screwdriver.  Visually examine the area around the meter to ensure your safety (Bees and Black Widow Spiders may nest in meter boxes.)  A cap covers the face of the meter. Lift this cap to read the meter.