When does copper leach to water? Conflicting faqs I have heard conflicting reports:

Copper leaches to water only when the water is high in acid or the Copper is corroded.
Copper leaches to water any time, especially when it is new copper or the water is hot.

Which one would be correct?
The second answer would be correct in an analytical context as the auto-ionization of water decreases in pH as temperature increases. And new copper does not have the surface of reacted material to shield the metal underneath, as such, scenario 2 always occurs, scenario one occurs faster, however, it's conditional statement that the water be acidic and the copper be corroded are invalid.
Cheers,