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Amazon data centers used 2.5bn gallons of water in 2025
(www.datacenterdynamics.com)
This is a most excellent place for technology news and articles.
I would also like to know the answer to this.
I have a water-cooled PC and I only add water to it about once a year when the reservoir is around 2/3 full. My loop is water-tight, not air-tight, so water is slowly lost to evaporation.
I would think enterprise loops would be air-tight but perhaps the cost of implementing that is less than paying for water to be added