Data Centres' Growing Water Problem

Imagine a data centre's servers generating genuinely enormous heat continuously, and traditional cooling systems managing that heat largely through water-based evaporative cooling, meaning India's data centre boom, covered under the capacity expansion discussion elsewhere on this site, carries a direct, quantifiable water cost, roughly 150 billion litres consumed in 2025, projected to more than double to around 358 billion litres by 2030 as capacity keeps expanding.

This water intensity creates a genuine tension similar to the sugarcane water stress discussed elsewhere on this site, data centres increasingly concentrate in specific metro regions, covered under the Mumbai-Chennai hub discussion elsewhere on this site, and several of these same regions already face meaningful water stress for drinking water and other uses, meaning large-scale data centre water consumption competes directly with existing municipal and agricultural water demand in exactly the locations where new capacity keeps getting built.

The industry's primary technical response has been shifting toward liquid cooling systems, which use meaningfully less water than traditional evaporative cooling towers, CtrlS Datacenters' Kolkata campus, launched in 2025, specifically adopted liquid cooling to manage this exact concern, part of a broader industry shift where operators increasingly treat water efficiency as a core design consideration for new facilities rather than an afterthought addressed only after construction.

This water challenge connects directly to the data centre power demand discussion covered elsewhere on this site, both water and electricity represent genuine, physically constrained inputs that data centre expansion consumes at scale, meaning India's AI infrastructure ambitions, covered throughout this page, depend not just on chip availability and capital investment but on whether the country can sustainably supply the water and power these facilities require without meaningfully straining resources needed elsewhere in the same regions.