Subject: What would cause copper piping to turn Blue?

Hello,
I have asked everyone about the copper piping turning blue and no one can tell 
me. We are building a new home, and we have noticed all of the copper piping 
is turning blue through out the house. (basement) We are living in the 
basement right now. The basement is concrete on three sides and one side is 
open. You can leave a copper penny lay out and it turns blue. Also, my husband 
has a silver type belt buckle and it turned blue. I can tell you that we do 
have sulfur in our water, and we use a humidifer. Also, you can not take a 
shower with any silver jewelery on because it turns it black 
It has even turned my new copper door jams blue.
Thansk!
Sue

Re: What would cause copper piping to turn Blue?