Look for water leak signs on your property. Look at your driveway, curb or street for evidence of water flow. The evidence may not be a steady stream of water; it may only be a puddle in your grass that never dries up, or a darker spot on dry concrete.
Start by taking a water meter reading before and after a two-hour period when no planed water is to be used. If the meter reading is not exactly the same as the beginning reading, you may have a water leak.