Grey water footprint is a concept used for water footprint accounting. It refers to the volume of water needed to dilute pollutants to such an extent that the quality of the ambient water remains above agreed water quality standards.
Perspectives are different frameworks from which to explore the knowledge around sustainable sanitation and water management. Perspectives are like filters: they compile and structure the information that relate to a given focus theme, region or context. This allows you to quickly navigate to the content of your particular interest while promoting the holistic understanding of sustainable sanitation and water management.