Blue stains in shower / sink

[HayZee518]

have your water checked for high concentrations of chlorine. chlrine reacts with the copper to form a blue hue.

[regression]

Hello all, I have noticed blue stains in our shower and sink. I just started researching this and it sounds like the pH of our water might be too acidic. Anyone have any insight? I am still trying to find info on this, but my fear is we will need to replace pipes, which sounds expensive depending on where they are in the house...