This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
Both metal and copper oxidize when exposed to oxygen and this is a natural process. Copper that is exposed to the outside environment is more likely to turn green and that is why copper vases and decorative pieces in gardens are often green.
1 Blue or Green Color-A green or blue color is generally a result of copper in your water supply, or copper pipes and corrosive water (1). 2  The copper can cause staining of your fixtures and your laundry.3  Copper is regulated in drinking water by the EPA at 1.3 PPM. The addition of chlorine is used to kill off bacteria and other harmful microorganisms (2). 2  Metallic taste-Some water systems have a high mineral concentration giving the consumer a salty or soda taste. 3  In the case of Iron and Manganese, a strong metallic taste is readily detected (1).