We must go by the readings on the meter to calculate your charges, so all we can do is suggest common problem areas for you to check, such as: Sprinkler systems: They use more water than most people think. You can read your meter anytime to keep up with your usage. If it is set to come on during the night, read the meter before you go to bed, then again the next morning before anyone uses any water to see how many gallons were used. Commodes: Sometimes they do not shut off automatically and this can run a lot of water through it while you're away. (Silent leak - described below) Leak in the line from meter to house: Sometimes a wet spot does not show on top of the ground. Water can leak from the line down into the ground.