alt Hacker NewsA pretty easy 'optional' comparison would be golf course watering. I saw a much more detailed write up on this that I can't find now, but a quick google shows 500 billion gallons a year for US golf courses and 180 billion gallons a year for all data centers, not just AI data centers.
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The problem with these numbers though is water isn't really lost in those processes and has another dynamic: you can't really bank it. There's tons of ecosystems where the biggest problem is we have to ensure a certain amount of water goes through them to keep them alive.
And so in that context all water usage is not equal: watering a golf course where run off goes back to local estuaries is different to evaporative cooling is different to industrial or residential usage.
I mean, I know a lot of people who are also against golf courses for very similar reasons
Possibly one of these, shared to HN in the past year:
https://www.construction-physics.com/p/how-does-the-us-use-w...
https://www.construction-physics.com/p/i-was-wrong-about-dat...