Comment by edude03
I asked a friend who works on datacenter this so it's secondhand information but - apparently it's cheaper to use mist cooling where you essentially spray cold water on hot parts and it evaporates off instead of the normal closed loop system that you'd see in a home water cooling for example. And while it's not destroyed, it means you need a constant supply of clean water, and the evaporated water doesn't necessarily go back to the body of water you got it from.
Kind of crazy we let them blow through our limited clean water supplies just because it's cheaper