Water-Intensive Data Centres: Reasons, Concerns & Gaps

India’s data-center capacity reached over~1,500 MW in 2025 and is expanding rapidly, intensifying concerns over water-stressed cities.

Current Facts and Data

Capacity Surge: India’s data-centre capacity reached 1.4–1.6 GW in 2025.
Future Expansion: Capacity is projected to reach approximately 5 GW by 2030.
Water Intensity: Data centres consume 1.5–2.5 litres per kWh.
Daily Demand: A 20-MW center may consume 1–1.2 million liters of water daily (MLD).
Investment Pipeline: Nearly $30 billion investment supports India’s data-centre expansion.

Reasons for Data Centres Water Demand

Heat Generation: High-density AI workloads generate substantial heat; India’s data-centre capacity exceeded 1,500 MW in 2025.
Evaporative Cooling: Cooling towers dissipate heat through evaporation, with Indian centres consuming 1.5–2.5 L/kWh.
Freshwater Dependence: A 20-MW data centre can require around 1–1.2 MLD of water, depending on cooling technology.
Water Quality: Evaporation concentrates dissolved salts, causing scaling and corrosion and requiring freshwater make-up.
Climate Sensitivity: Water demand rises during hot, dry months, while clusters could reach 5–10% of municipal demand.

Water-Security Concerns

Urban Competition: Data-centre clusters could consume 5–10% of municipal water, intensifying competition during drought years.
Groundwater Depletion: High-TDS groundwater needs additional treatment, while over-extraction accelerates aquifer depletion and borewell failures.
Seasonal Vulnerability: Cooling demand peaks during hot, dry months, coinciding with India’s seasonal water scarcity.
Pollution Externalities: Around 80% of urban water returns as sewage, creating major pollution risks without adequate treatment.

Government Initiatives

BIS Standards: BIS standards establish Water Usage Effectiveness, Cooling Efficiency Ratio, and Carbon Usage Effectiveness for data-centre resource monitoring.
District Cooling: Bureau of Energy Efficiency’s 2023 Guidelines recommend treated water for cooling-tower make-up, reducing freshwater dependence.
Groundwater Regulation: Ministry of Jal Shakti guidelines regulate groundwater extraction, requiring permissions and conservation measures for infrastructure projects.
Environmental Safeguards: Environmental Impact Assessment rules require qualifying projects to assess water availability, water balance, and greywater recycling.
Treated-Water Reuse: NITI Aayog’s 2025 workshop promoted treated wastewater for emerging needs, including data centres, strengthening circular water management.

Regulatory Gaps

Investment Bias: State policies prioritise power concessions, land incentives and tax benefits, while water governance remains secondary.
Supply Assurance: Water is treated as an assured utility rather than a resource, despite data centres potentially consuming 5–10% of municipal demand.
Groundwater Blindspot: Groundwater extraction relies on generic Central Ground Water Authority permissions, lacking data-centre-specific safeguards.
Disclosure Deficit: India lacks standardised mandatory reporting of Water Usage Effectiveness, source mix, and wastewater reuse.
Planning Gap: Data-centre approvals rarely assess city-level water carrying capacity, increasing risks in water-stressed regions.

Way Forward

Wastewater Revolution: Mandate treated used water for cooling, following Chennai’s wastewater-reuse approach to reduce freshwater dependence.
Water-Positive Centres: Promote advanced cooling such as immersion and direct-to-chip cooling to minimise evaporative water consumption.
Smart Water Budgets: Assess projects against city-level carrying capacity, particularly in water-stressed states such as Maharashtra and Tamil Nadu.
Price for Conservation: Introduce differential pricing so data centres financially prefer treated wastewater over freshwater.
Digital Water Audits: Mandate Water Usage Effectiveness, source-wise disclosure, and water audits, making water footprints as visible as energy footprints.

“The cloud must not drain the aquifer”; sustainable cooling and wastewater reuse can make India’s digital growth water-secure and resilient.

Reference: Hindustan Times

PMF IAS Pathfinder for Mains – Question 814

Q. Cooling the digital economy could heat up India’s water crisis. Analyse the regulatory gaps and water-security challenges posed by India’s expanding data-centre ecosystem and suggest a sustainable policy framework. (250 Words) (15 Marks)

Approach

Introduction: Write a contextual introduction about water-intensive data centers in India.
Body: Write about regulatory gaps and water-security challenges posed by India’s expanding data-centre ecosystem, and suggest a sustainable policy framework.
Conclusion: Emphasize water-smart, circular cooling and accountable data-centre governance to reduce freshwater dependence, protect urban water security, and enable sustainable digital growth.