07 DATADOCK , FRANCE

Website : www . heg . com Datadock is located in Strasbourg , France , and uses water wells that were custom-built specifically for the servers . Using plentiful groundwater sources at a temperature of just under 54 °, the centre manages to hit a PUE of 1.18 . The water not only extracts the heat from the servers , but the whole system is designed to ensure zero pollution and zero waste . All leftover water can be reused again to cool off the servers .