A medium-sized data center uses the same amount of energy as around 300,000 households.
"There are two stages to the cooling system. First, server-level cooling moves the heat from the server to a heat exchanger, which involves no water loss or water consumption. However, the second stage moves the heat from the heat exchanger to the outside environment using water to cool. Water evaporation is usually the most efficient way to do this job."
https://ktar.com/arizona-technology-news/data-centers-environment/5686066/