Amazon wants to help the Colorado River, but we still don’t know how much water the company uses

In June, Amazon disclosed that its data centers used 2.5 billion gallons of water globally in 2025, including those it owns, leases, or shares. Data centers Amazon owns and operates directly reduced their water consumption by 2 percent in 2025 compared to the year prior, according to the company. It attributes gains to a 52 percent improvement in water efficiency since 2021. The company says it uses 0.12 liters of water per kilowatt-hour of electricity, claiming that’s about seven times more efficient than the industry average for data centers.

Amazon’s annual sustainability report shares water use per unit of power (l/kwh) for its data centers since 2021, but not the company’s total water use over that time period. Sustainability experts and environmental advocates caution against assessing a company’s sustainability by efficiency measurements alone. The more efficient a technology becomes, the more resources it might ultimately consume as companies start using it more, according to an economic concept called Jevons paradox . That makes it important to track how much water a company is using overall, as well as how much it needs in each place it operates during demand peaks when supply is most limited.

For comparison, Microsoft’s latest sustainability report discloses its data centers’ total water use since 2020, while Google’s report shares water use for global operations since 2021 with a breakdown by location. All three tech giants have had to abandon data center projects after facing community opposition, Reuters reports . Unlike other tech companies, Amazon’s warehouses also have a massive physical footprint that isn’t reflected in the company’s data center disclosures.

A Guardian investigation in 2025 alleges that Amazon obscured how much water the company uses by deciding not to account for how much it takes to generate electricity, considered a “secondary” water use. Concerned about “reputational risk,” executives decided to only address “primary” water use at its facilities when calculating progress toward sustainability goals. The numbers Amazon recently shared about its data center water use also exclude water consumption stemming from electricity generation .

While data centers often use water for cooling systems, a majority of a data center’s water footprint stems from this “secondary use.” Power plants need water to cool equipment and turn turbines using steam, and in 2021, Amazon used 10.5 billion gallons (39.7 billion liters) of water in 2021, according to the Guardian report citing an internal leaked document. That’s about as much as 95,000 US households consume.

In an email to The Verge , Amazon spokesperson Margaret Callahan says the Guardian report “relied on cherry-picked data from an outdated document that misrepresents our water strategy — making the conclusions fundamentally wrong and misleading” and that a “document’s existence doesn’t guarantee its accuracy or finality.”

Callahan didn’t provide more data on how much water Amazon has used in total over the years. She pointed out that the company is 75 percent toward its goal of becoming water positive, returning 3 gallons for every 4 that it used last year.

In its announcement today, Kara Hurst, chief sustainability officer at Amazon, compares the new Colorado River initiative to the company’s previous climate targets.

”Through the Climate Pledge, we’ve seen what happens when companies tackle a problem together: progress accelerates. We’re bringing that same model to the Colorado River because water and climate are deeply connected,” Hurst says.

Amazon’s carbon footprint, however, grew 16 percent in 2025 — a trend happening across the tech industry as companies race to make advances in AI.