Note: if you live in a southern climate, most meters are outside near the curb. For northern climates where freezing is an issue, most meters are located in the basement.
Note: The best time to take a reading is in the early morning when your new system will be on most of the time. This should be done when there is no other water running in the house. i.e laundry, showers, etc. This info is also available from your local water provider.
Note: This should be in a garage, basement, or outside in an accessible location or next to the electric breaker panel.