Attempted to locate water leak in yard. Pumped out all water and turned water on at meter. Meter is not turning and functions properly when hose bib in use. This leak is potentially on the city side. After city utilities department inspected their side they stood firm it was customer side leak. I further investigated ground water source and installed gauge on hose bib. After pressuring system I turned meter off and gauge held 70 for over 30 min. In conclusion, this water leak is from the cities source.