http://waterfootprint.org/en/resources/interactive-tools/water-footprint-assessment-tool/

The Global Water Footprint Assessment Standard is the internationally accepted methodology for conducting a Water Footprint Assessment (WFA). WFA provides comparable quantification of water consumption and pollution and robust analytics that can be used to understand water dependencies in direct operations and supply chains, for products, facilities and companies and at different geographic scales. 

The standard can be used to:

Calculate the green, blue and grey water footprint of water used for industry, agriculture and domestic water supply;

Conduct a water footprint sustainability assessment which includes criteria for understanding the environmental sustainability, resource efficiency and social equity of water use, for both consumption and pollution; 

Use the results of the water footprint accounting and sustainability assessment to identify and prioritise the most strategic actions to be taken in local, regional, national and global scales, individually and collectively.

Other languages available here: http://waterfootprint.org/en/resources/publications/water-footprint-assessment-manual/
"/> http://waterfootprint.org/en/resources/interactive-tools/water-footprint-assessment-tool/

The Global Water Footprint Assessment Standard is the internationally accepted methodology for conducting a Water Footprint Assessment (WFA). WFA provides comparable quantification of water consumption and pollution and robust analytics that can be used to understand water dependencies in direct operations and supply chains, for products, facilities and companies and at different geographic scales. 

The standard can be used to:

Calculate the green, blue and grey water footprint of water used for industry, agriculture and domestic water supply;

Conduct a water footprint sustainability assessment which includes criteria for understanding the environmental sustainability, resource efficiency and social equity of water use, for both consumption and pollution; 

Use the results of the water footprint accounting and sustainability assessment to identify and prioritise the most strategic actions to be taken in local, regional, national and global scales, individually and collectively.

Other languages available here: http://waterfootprint.org/en/resources/publications/water-footprint-assessment-manual/
"/> Water Footprint Assessment Manual: Setting the Global Standard