AI Water Consumption Statistics 2026 and Key Findings
AI-summarised brief · reviewed before publication
A peer‑reviewed study estimates that operational AI systems consumed between 312.5 billion and 764.6 billion litres of water in 2025, excluding supply‑chain and end‑of‑life impacts. The wider data‑centre sector’s electricity‑associated water footprint was 4.5 trillion litres that year, with AI accounting for roughly one‑fifth of that use. The United Nations University projects the total data‑centre water footprint to reach 9.3 trillion litres by 2030. Google’s Gemini Apps text prompt used 0.26 mL of water, while Mistral’s 400‑token response required 45 mL under a broader lifecycle approach. Alphabet, Microsoft, and Meta reported 10,869 million gallons, 8,170 megalitres, and 3,123 megalitres of water use respectively in recent fiscal years. These figures illustrate that AI’s water demand is real, concentrated at infrastructure and watershed levels, and varies widely with model size, output length, and cooling design.
💡 Why It Matters
- · The data reveal that AI’s hidden water consumption rivals that of entire data‑centre operations, underscoring a critical, often overlooked environmental cost that could shape future sustainability standards.