Well then the governments gonna play hell with homeowners huh? Every house in the world has copper plumbing (except the 3rd worlds) but in general if it was bad it would have been banned like Lead (lead pipes/paint banned in 1978) for water supply.... we require a daily dose of copper in which we dont really get any from plumbing unless it sits for extremely long periods.
every thing is bad for us in large doses, doesnt matter what it is, but if we got so much from copper pipes as they claim then we would be replacing those pipes sooner than soon as the copper has to errode somewhere. dissolve like candy...just putting an idea there, it doesnt happen. Copper actually produces a protective coating inside.