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Figure S1. Effect of using different cleaning practices at the use stage (DA=Direct Application, FS=Full Sink). Results are split by their contribution across life cycle stages, using the Pfister midpoint method which assesses water stress from blue water consumption (Pfister et al, 2009).

Figure S2. Comparison of the Pfister midpoint result for the manufacturing stage at London plant using the method at two different spatial levels (country vs. grid cell).

Table S1: list of ingredients in Fairy hand dishwashing product.

Table S2: Ingoing parameters in inventory model for formulation, packaging, distribution and use of Fairy hand dishwashing product.

Table S3: End of life infrastructure data for Spain and Germany applied in the inventory model for Fairy hand dishwashing product.

Table S4: Inventory method results for the cleaning of 10 plates in Spain, using the Direct Application method and an electrical boiler.

Table S5: Midpoint method results for the cleaning of 10 plates in Spain, using the Direct Application method and an electrical boiler. All methods are in Leq except for the Swiss ecological scarcity method which is expressed in kUBP. The water scarcity indices are used for the Milà -i-Canals method: one based on a water use per capita ratio (WRPC) and one based on a water use per resource ratio (WUPR).

Table S6: Endpoint method results for the cleaning of 10 plates in Spain, using the Direct Application method and an electrical boiler.

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