[sohex]

I think this article hand waves and side steps what I see as two notable issues.

The main one is aquifer depletion. The consumptive vs withdrawal argument mostly holds water, but consumptive is a sliding scale. Evaporative cooling for data centers is solidly at the far ‘truly consumptive’ end of that scale because the consumed water will not reenter the local watershed. That’s problematic because aquifers are very slow to refill. So this is genuinely a concern in water stressed areas.

The other is the weak growth model. I suspect we’re only going to see faster and faster growth of data centers in coming years, making the consumption there more exponential than linear. Meanwhile the majority of the other consumptive consumers are strongly tied to demographics and population growth is slowing everywhere. For example agricultural water use in the US has held steady or even declined in recent years.

In fairness, part of that agricultural decline in use is from advancement in technology and methodology and we’ll likely see the same with data centers, but those numbers are unpredictable.

On the whole I agree that the concern over data centers in terms of water (and electricity) usage is overblown to an extent, but I think we do need to pay closer attention to the points that actually matter when looking at the situation.