[kleton]

The Meta FTW data centers use evaporative chillers, but they re-condense the water so that it's a closed loop.

[sdenton4]

Yeah, the funny thing about the water claims is that there's a pretty simple technological fix: closed loop exists, and seems to be simply the better choice going forward as new DCs are built (excepting of course things like musk's 'rolling coal' bullshit).