Uh oh, we in the Tampa Bay area have a problem, then. Most homes are now constructed with Schedule 40 PVC.
There's been a continuing problem with copper pipe; the solder flux reacts with chemicals in the water supply and water lines built with copper are prone to developing pin-hole leaks. In my brand new house that I lived in for 14 years, I had to have leaks repaired on 4 different occasions. One of those was beneath the slab in the garage. I had to chisel and jack hammer a section of the slab out to repair the leak. That was a real pain. Others were in the wall between rooms. That resulted in having to replace sections of drywall that were water damaged and/or had to be removed to get to the pipes to repair them.
I believe drinking-water systems use CPVC.