Defines: blue water, green water, grey water, water scarcity footprint, water availability, water degradation, direct/indirect water use, etc.

Here is the based on your request for “ISO 14046 Water Footprint PDF 19” — which refers to ISO 14046:2014 Environmental management — Water footprint — Principles, requirements and guidelines , specifically in relation to clause/section 19 (typically Annex B or an informative section in the 2014 document).

Must include: water sources, geographic detail, characterization models, exclusion of green water from scarcity, uncertainty analysis.

Optional but required if goal includes water quality. Uses fate, exposure, and effect factors for eutrophication, acidification, ecotoxicity, etc.