If we determine a high meter reading to be accurate, follow these step-by-step instructions to check for a water leak:
Make sure water is not being used (e.g. dishwasher, washing machine, shower, air conditioner, irrigation, etc.).
Go to your water meter, remove the lid and write down your water meter reading. If you have a radio type meter you will need to shine a light on the meter to activate the solar readout. Please be sure to replace the lid.
Wait 20 to 30 minutes, keeping all water off.
Go back to your meter and see if the reading has changed.
If the reading has changed, that means water is moving through the meter without usage in the house, and thus, probably means there is a leak.
To further isolate the leak, shut off the water main to the house and repeat the above steps. If the reading still changes, it most likely means there is a leak between the meter and the house.