If your property has more than one water meter attached to one building, it is likely that the meters are reading for different uses of the water (ie. property, fire emergency and irrigation). You can normally tell what a meter is reading by looking at the numbers it produces.
If a property has three meters and one reads far lower than the other two, it is mostly likely a fire system. If one fluctuates during winter months, then it is likely an irrigation meter. The third is most likely the property meter. These are usually accurate, however the best way to determine what a meter is reading is to call the utility company, a service WegoWise is more than happy to perform.