Well I heard years ago that copper water-pipes are NOT good for your health. Nor of course is lead - they used this in lots of water pipes in some big cities, which they replaced gradually.... Copper as far as I know is a trace element that the body needs - but as it says only in TRACES - or small quantities. Might well be that one gets MORE than required thru copper pipes. One child I know had an enlarged liver and the doc thought this could be from the copper pipes.....