Water meter to a PVC pipe to a metal pipe. Why?
Besides the reasons given in the other answer (available or preferred material), there might be a problem related to corrosion and/or grounding/earthing which means to require an electrically separated pipe system for each building.

In the past, earthing/grounding via the provider's metal pipes was a common procedure, nowadays it may be even prohibited, i.e. a special ground rod/grounding system is necessary.