No. Sonic can't tell you exactly where the leak is, just that it exists, and approximately how much water is escaping. Sometimes Sonic can provide a clue. If the leak starts around the time an appliance starts drawing water, there's a reasonable chance that the two events are linked. 

You can also look for the leak yourself by checking around the base of all appliances that use water such as dishwashers, washing machines, boilers and so on, and checking all of your taps, showers, bathtubs and outdoor taps. If you can't find the source it's often wisest to shut off the water and call a plumber to investigate.