Proper grounding involves connecting things to be grounded to "bonding points". Ground zero of the bonding points is the rod in the ground for your electrical service. It may not be right at the meter (especially if you have a concrete floor) but there WILL BE a ground rod and it should be shown in the house plans.
Water pipes are well down the list of places you should start looking to ground to as most modern water installations (and remodels) use a lot of PVC and PEX instead of copper and steel. To be considered a ground, steel pipe must run for a least 10' underground. It hasn't been safe to assume that steel pipe was used all the way to the meter for more than 50 years. Natural gas lines are the same story.
For what many consider the definitive work on the subject of electrical codes, visit
Mike Holt