Amazon just told the world how thirsty its cloud computing empire really is. The company disclosed that its global data center operations withdrew approximately 2.5 billion gallons of water in 2025, marking the first time Amazon has publicly accounted for this particular resource drain.

The numbers behind the disclosure

Despite aggressively expanding its data center footprint to keep pace with AI demand, Amazon says water withdrawals at sites it directly owns and operates actually fell by 2% compared to the prior year.

The company’s water usage effectiveness, or WUE, hit 0.12 liters per kilowatt-hour in 2025. That figure represents a 52% improvement since 2021. The industry average sits around 0.84 liters per kilowatt-hour. Amazon’s number is roughly seven times better than that benchmark.

Amazon also reported returning about two-thirds of the water it used through community infrastructure projects. The company says it’s now 75% of the way toward its goal of becoming “water positive” by 2030, meaning it would return more water to local communities than it consumes through direct operations.

On the recycled water front, Amazon plans to expand the use of recycled water for cooling across more than 120 US data centers by 2030. That initiative alone is projected to save over 530 million gallons of fresh drinking water annually.

Why data centers are so thirsty

Data centers generate enormous amounts of heat. Water-based cooling systems are one of the most effective ways to manage that heat, which is why the industry drinks so deeply from local water supplies.

US data centers collectively consumed an estimated 17 billion gallons of water in 2023. Amazon’s 2.5 billion gallon withdrawal represents a meaningful but relatively modest slice of that total, particularly given the company’s dominant position in cloud computing through AWS.

What this means for investors

The 52% improvement in water usage effectiveness since 2021 is the kind of metric that appeals directly to ESG-focused investors. Returning two-thirds of consumed water through community projects adds another layer to the story, though the details of how that water is “returned” and whether it actually offsets local impact deserve closer scrutiny.

For the broader cloud computing market, Amazon’s disclosure likely pressures competitors like Microsoft and Google to provide comparable transparency. Microsoft has already published some water consumption data, reporting significant year-over-year increases tied to its AI investments. Google has done the same, with similarly uncomfortable growth trends.

Investors watching this space should track not just the efficiency ratios but the absolute withdrawal figures year over year, alongside the geographic distribution of that consumption. A data center that’s water-efficient by global standards but located in a water-stressed community still creates political and regulatory risk that the headline numbers won’t capture.