You’re rationing water. Your borewell is drying up. You’re budgeting for tanker deliveries like school fees. And just a few kilometres away, a gleaming data centre is quietly drinking millions of litres of freshwater — every 24 hours — just to keep its servers cool. Welcome to Bengaluru’s most uncomfortable paradox.
Bengaluru Water Crisis vs. Data Centres — Key Numbers
| Metric | Data |
|---|---|
| Bengaluru’s Daily Water Demand | 2,600–3,000 MLD (million litres/day) |
| Cauvery Supply Available | ~2,000 MLD |
| Daily Shortfall (BWSSB estimate) | 775 MLD |
| Govt borewells already dry | ~14,000+ |
| Data centres in Karnataka | 32 operational (31 in Bengaluru) |
| Water per 1 MW data centre | ~68,500 litres/day |
| Water per 20 MW AI facility | ~1.4 million litres/day |
| Bengaluru data centre water permissions | ~812.9 million litres/year |
| India’s projected data centre water use by 2030 | 358 billion litres/year |
| Groundwater extraction in Bengaluru Rural | 169% of permissible limit |
The Scale of the Problem Is Staggering
Bengaluru, India’s Silicon Valley and its fastest-growing metropolis, is sitting on a ticking water bomb. Each day, the city requires between 2,600 and 3,000 million litres of water for domestic and industrial use, with around 2,000 MLD pumped from the Cauvery — and a significant share of the city’s government borewells have already run dry.
Meanwhile, the AI boom is supercharging the city’s data centre footprint. Out of 32 data centres currently operational in Karnataka, 31 are located in Bengaluru, with Whitefield alone hosting seven major facilities at nearly 120 MW of capacity.
Here’s the gut punch: a 20 MW facility — common among newer AI-focused campuses — requires approximately 1.4 million litres of water daily, equivalent to the daily needs of around 27,000 urban households.
The Paradox Nobody Wants to Talk About
Residents in several parts of Bengaluru track tanker arrivals like train schedules. Yet state policy actively incentivises data centre expansion, with the Union Budget 2026 announcing a tax holiday until 2047 for foreign companies setting up data centres in India.
The environmental math simply doesn’t add up. Bengaluru’s Devanahalli area — fast emerging as a new data centre hotspot — has no perennial water source, relying solely on groundwater, with extraction already at 169% of permissible limits and no net groundwater available for future use.
As researcher Khushbu Birawat from Paani Earth put it bluntly: “I don’t think it’s wise for new data centres or any water-intensive industries to come up in Bengaluru.”
What Happens Next?
India’s data centre water consumption is projected to more than double from 150 billion litres in 2025 to 358 billion litres by 2030. Without mandatory water disclosures, sustainability mandates, and alternative cooling technologies, Bengaluru’s residents will keep paying for tankers while server farms drink for free.
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