The argument
Artificial intelligence rests on physical infrastructure: data centres, semiconductors, electricity generation, cooling and critical minerals. Debate has concentrated on bias, privacy and labour disruption. The piece argues the least examined dependency is freshwater. The footprint has three components: indirect water use at the power stations supplying data centres, direct on-site consumption for evaporative cooling, and embedded water in semiconductor manufacture. The piece takes the second and third. Data centres. Servers run constantly and generate heat that must be removed, and water-based cooling handles the thermal loads of dense AI hardware far better than air. A 100 MW hyperscale facility in the United States consumes around two million litres a day, roughly the draw of 6,500 households. Globally, data-centre consumption sits near 560 billion litres a year and could approach 1,200 billion litres by 2030. Because it is usually drawn from municipal potable supply, the most accessible source, stressed regions see facilities competing with communities and agriculture. Semiconductors. Half the steps in chip fabrication require ultra-pure water, and around 90 per cent of water consumption at the manufacturing stage goes into producing it. A large plant processing 40,000 wafers a month can use up to 18 million litres a day. Over a year that is comparable to the consumption of a town of 60,000 people. The consequences are permits under closer scrutiny, moratoria on new construction, drought restrictions on manufacturing, and reputational exposure. The responses are closed-loop and direct-to-chip cooling, hybrid and dry systems, reuse within the same watershed, and replenishment. Reclaimed water has now been brought into leading-edge semiconductor processes. The conclusion is that scale is gated less by the volume of water available than by the quality of the stewardship around it.Related
- The next AI bottleneck, the build-out that creates this demand.
- Sustainable investing, how the bank approaches environmental factors in portfolios.
- What Bordier publishes, the research series this piece belongs to.
- Bordier in Singapore, the entity that publishes this series.
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