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In 2017, the average water consumption of households in Europe was estimated at 147 litres/day/person[3]. The daily minimum to meet basic human needs is estimated at 50 litres/day/person (Gleick, 1996) so the European average is comfortably above that threshold. Nevertheless, the average water supply to European households varies substantially on a national level, e.g. 115 litres/day/person in Belgium to 265 litres/day/person in Spain. Bernhard et al. (JRC, 2020b) have collected water use data of households for the period 2000 to 2013 at NUTS3 level. Aggregated to four categories of regions, based on climate and income, they find water uses varying between 112 to 159 litres/day/person; with the lowest values in cool/low income areas, and the highest in warm/high income areas.