The Data Centre Water Crisis Nobody Is Talking About

The energy consumption of AI data centres has received significant attention from investors, regulators, and the public. The water consumption has received almost none. This is a significant oversight. A single large-scale data centre can consume millions of litres of water per day for cooling — water that is drawn from local aquifers, rivers, and municipal supplies, and that is largely evaporated rather than returned to the source. As AI workloads drive data centre density and power consumption to new heights, the water footprint of digital infrastructure is becoming a material issue for investors, operators, and the communities in which these facilities are located.

The scale of the problem is illustrated by a single statistic: Microsoft disclosed in its 2023 environmental report that its global water consumption increased by 34% year-on-year, driven primarily by the expansion of its AI infrastructure. Google reported a similar trajectory. The hyperscalers are investing heavily in water-efficient cooling technologies — liquid cooling, adiabatic cooling, closed-loop systems — but the pace of efficiency improvement is being outrun by the pace of capacity expansion. The net result is that aggregate water consumption by the data centre industry is rising rapidly, even as water efficiency per unit of compute improves.

The investment implications are twofold. First, data centre development in water-stressed regions — the American Southwest, parts of Southern Europe, and several Asian markets — faces increasing regulatory and community opposition that can delay or block projects entirely. Investors in data centre development need to incorporate water risk into their site selection and underwriting processes, not as an ESG checkbox but as a genuine constraint on project viability. Second, the companies developing water-efficient cooling technologies — liquid immersion cooling, rear-door heat exchangers, advanced adiabatic systems — are addressing a problem that will only grow in importance, and represent a compelling investment opportunity in their own right.

At Lensbridge, we incorporate water risk into our assessment of digital infrastructure assets as a standard part of our due diligence process. In a world of increasing water scarcity, the data centres that will retain their value are those that have been designed with water efficiency as a first-order constraint, not an afterthought.