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AI uses less water than the public thinks

californiawaterblog.com

41–50 of 425 posts

Re: AI uses less water than the public thinks

#41
post #36
post #25

Greater than $0 in cost of living increases for people living near these things is too much.

Are you saying any industry that brings in net new jobs with above median wages is bad? Or just ones with few employees and high additional property tax revenue?

If we could magically guarantee that our [starry-eyed|gullible|treacherous] political leaders didn't give back most of those property taxes before the DC even broke ground...

Re: AI uses less water than the public thinks

#43

I don’t really get the water concerns in datacenter cooling. Even if a lot of water was used for cooling with every prompt (which he argues against here, but, even if )… water “used up” by cooling just comes out a little hotter, right? Maybe evaporated. Then it’ll come back in the form of rain. This isn’t an industrial chemistry process that leaves some toxic waste in the water. Or an agricultural one that puts water…

The absolute strongest complaint is that DCs consume treated, potable water, which is less abundant / easily re-created than any old non-potable source. (Of course the easy solution here is DCs just ingest / treat their own non-potable source. Or utilities charge rates sufficient to price in the externality of drawing down more potable water. The economics still work for DCs if they need to treat their own water -- the fundamental problem is that utilities are underpricing their potable water, so DCs prefer it all else being equal.)

Re: AI uses less water than the public thinks

#44
post #3

This is a bit of a dead horse, but the magnitude of how off the public is on this continues to amaze me. Pete Buttigieg did a Tulsa town hall a week or so ago where someone cited it taking "10,000 gallons of water just to generate one photo".[0] [0]: https://www.youtube.com/watch?v=MCc-ipWVShY&t=1h5m43s

That's populism for ya, and it's sadly extremely effective. Meanwhile, both China and India are giving free electricity, providing dollar-for-dollar capex subsidizes, and 25 year tax exemptions to build data centers [0][1]. Love how HN wants to strangle the infrastructure that underlies our entire industry and why HNers get paid. It really highlights how much of the opposition to AI comes from the "chattering classes…

AI Datacenters are not how all or probably even most HNers get paid...

> Most data centers colo multiple types of compute, not just those dedicated to inference or model training. Additonally, strangling the economics of the infrastructure layer makes entire ecosystems move abroad.

Sure but we are talking about whether the enormous investment into AI infrastructure is prudent or not. Also I reckon most people on here made a living just fine before everything moved to remote data centers, and many if not most HNers workloads could run on individual machines... But that's another conversation.

Re: AI uses less water than the public thinks

#45
post #36
post #25

Greater than $0 in cost of living increases for people living near these things is too much.

Are you saying any industry that brings in net new jobs with above median wages is bad? Or just ones with few employees and high additional property tax revenue?

When the new jobs number increases to four (or even three) digits people will take that more seriously.

Re: AI uses less water than the public thinks

#47

I don’t really get the water concerns in datacenter cooling. Even if a lot of water was used for cooling with every prompt (which he argues against here, but, even if )… water “used up” by cooling just comes out a little hotter, right? Maybe evaporated. Then it’ll come back in the form of rain. This isn’t an industrial chemistry process that leaves some toxic waste in the water. Or an agricultural one that puts water…

The water isn’t gone but if it comes back as rain, it at least has to be cleaned again, since data centers probably don’t use raw rainwater for cooling.

It’s probably still not too bad but there’s at least some work done that’s „used up“ by letting tap water (or probably demineralized water used for cooling) evaporate.

Re: AI uses less water than the public thinks

#48
post #36
post #25

Greater than $0 in cost of living increases for people living near these things is too much.

Are you saying any industry that brings in net new jobs with above median wages is bad? Or just ones with few employees and high additional property tax revenue?

I'm concerned with the ones that create temporary jobs, few permanent ones, drive up water and electrical rates and then help deskill other industries.

Re: AI uses less water than the public thinks

#49

Usually when people compare data center water usage to golf course water usage I feel a lot better about the whole thing.

Compare it to alfalfa and you’ll be laughing your ass off at how much water alfalfa consumes.

~340 acres of alfalfa in California growing year round uses as much water as Google’s data center in The Dalles uses in one year.

That data center used 550M gallons for evaporative cooling in 2025, which is 1687 acre-feet of water.

One acre of alfalfa in California uses ~5 acre-feet of water per acre of alfalfa per year. There are around a million acres of alfalfa grown in California, or 5 million acre-feet of water per year on alfalfa. Which is used to feed cows.

Re: AI uses less water than the public thinks

#50

I don’t really get the water concerns in datacenter cooling. Even if a lot of water was used for cooling with every prompt (which he argues against here, but, even if )… water “used up” by cooling just comes out a little hotter, right? Maybe evaporated. Then it’ll come back in the form of rain. This isn’t an industrial chemistry process that leaves some toxic waste in the water. Or an agricultural one that puts water…

Just 30 mins from where I live data centers are having an impact on water used for farming.

https://www.theguardian.com/global-development/2024/sep/25/m...

https://www.bbc.com/news/articles/cx2ngz7ep1eo

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