Ah, the water-use BS again. In Europe, other than in the US, water use for data centers is strictly regulated. You cannot just do open-loop cooling and use a tap-water -> chiller -> sewer line. Things have to be closed-loop so there is no water consumption beyond the initial filling. The only thing you could get away with is to mist your outdoor units on the one or two hottest days per year. But even that is getting more and more restricted.