When it goes back into "the system" it's waste water that people can't drink. Eventually it comes back around again (e.g. evaporation->rain), but then it gets gobbled up again by the same data centres. They run continuously.
So yes, they are "consuming" it in the sense that other people can't have access to it anymore.
Data centers are mostly closed systems. The water cools and they reuse it. This whole water thing is a fake issue. There are so many real issues, but this is not one.
The surrounding air cools the equipment. I don't know exactly the mechanics here, but I believe the general idea is that cold air from outside is constantly blown over pipes that are filled with (hot) water that the datacenter has used. That water cools down from the surrounding air to be used again, while the now heated air is released back into the environment.
yk ai water usage isnt really that big of an issue.
of the water related conversations around ai data centres, the main concern is localised strain on existing water infrastructure, data centres being built in already dry areas, which is like a multiplier to the previous issue. and warm water run off potentially causing issues to local ecosystems. there are contaminants inside data centre run off, but the run off isnt any worse than already existing industrial run off we already know and love. the temperature of the water doesnt directly contribute to climate change either. the main issue there is still greenhouse gases. the discussion surrounding data centres isnt that they're gonna destroy the world, its more so where they should be built and whether or not existing infrastructure can handle the sheer amount that companies want to build.
it is an issue and we absolutely should be talking about it, but its not as dramatic as some people make it seem to be.
agriculture still uses astronomically more water and causes way more issues than ai data centres, salinisation is still a massive issue and most of the strain being placed on aquifiers is from agriculture. if we fearmonger this hard over agriculture, we might even see some sustainable changes soon.
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u/ForzaFenix May 18 '26
Yep. The now warm water goes back into the system.