You should proceed straight to the looney bin...or go directly to jail! IF you succeed in finding a leak, or CREATING a larger leak, you will possibly encounter a much bigger surprise than you were expecting! And you will surely be BLAMED for it! There was a hillside washed away here in San Diego a couple of years ago, took 6 houses with it. The lawyers are still fighting over whether leaking mains, sewers, or storm drains caused the leak.
If the water is as obvious as you say, get the channel 10 news girl out there with a camera crew. Contact your city council person, county supervisor, whoever your local elected official is. Those things can get the water company interested.