STRAIGHT ANSWER
Which AI company uses the most water?
Nobody can say honestly from public disclosures. Google reported 10.523 billion gallons of data center water consumption in 2025, Amazon 9.4 billion liters of withdrawal in 2025, and Meta 2.974 billion liters of consumption in 2024. Different metrics, years, and boundaries; none is AI-specific.
The context
Google's figure is owned and operated facilities, withdrawal minus discharge, under limited third-party assurance. Amazon's covers leased, owned, and shared data centers. Meta's excludes construction water. A tidy leaderboard would outrun the evidence.
The published figures, side by side
Different boundaries, dates, and metrics. This is a reading aid, not a ranking. Do not add the rows.
| Figure | Value | Boundary | Period | Evidence | Source |
|---|---|---|---|---|---|
| Google, global data centers | 10.523 billion gallons consumed | Owned and operated; withdrawal minus discharge; limited assurance | 2025 | Reported · primary | Google 2026 Environmental Report |
| Amazon / AWS, global data centers | 9.4 billion liters withdrawn | Leased, owned, and shared facilities; withdrawal, not consumption | 2025 | Reported · primary | Amazon 2025 Sustainability Report |
| Meta, global data centers | 2.974 billion liters consumed | Operations only; construction water reported separately | 2024 | Reported · primary | Meta 2025 Environmental Data Index |
| Microsoft, fleet average WUE | 0.27 L/kWh | Intensity ratio, not a total; absolute fleet table not published in the update | FY2025 | Reported · primary | Microsoft, June 24 2026 |
What this answer does not say
- That Google is the thirstiest company. Gallons and liters, consumption and withdrawal, and 2024 and 2025 are not comparable.
- That any of these totals belong to one AI product.