Water that is supplied to a manufacturing process, usually withdrawn from surface water bodies, groundwater, collected from rainfall, supplied by municipalities, etc.

In the ZDHC Gateway Supplier Profile section, user can select from three types of Incoming Water: Blue, Green, and Grey.
-Blue refers to the use of freshwater; surface water, ground water, or municipality supplied water.
-Green references to stored rainwater.
-Grey refers to water previously used for industrial or domestic purposes and is without faecal contamination.