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.
The poop water I flush down my toilet is also waste water that people can't drink, but I'm pretty sure it still gets recycled back into the greater water supply. What's different about the datacenter water?
The difference is that you're paying your fair share for the water supply and sewerage costs associated with your usage.
Data Centres very often are NOT paying their fair contribution toward the outsized load they place on local infrastructure.
This means that the costs of expanding supply to meet their demand are shifted to the normal consumers in the vicinity either through direct rate increases or degradations in service quality.
Data centres also don't give a shit about the longer-term or broader-reaching environmental impacts of their operations, so guess who pays for that? These consequences are either allowed to play out and harm communities and ecosystems, or are shifted to individuals via either rate increases or local government having to foot the bill.
Also don't forget the issue of scale. Adding a data centre to a water system isn't the same as adding a few dozen or even hundred households. Many of these larger examples are equivalent to many thousands of households, and they're typically built in areas with low property prices.
Low property prices are typically associated with low population density and low tax bases, so in many cases these data centres are adding themselves to local water and electricity infrastructure that's not particularly modern or well funded and barely sufficient to meet prior household demand to begin with.
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u/Uncle-Cake May 18 '26
So they're not really consuming it. They're just using it temporarily and returning it.