The truth about data center water usage

This one is about data centers, not home upgrades, but it touches on a debate you may have heard about: how much water AI computing centers use. A data center engineer explained that water use mostly comes down to design choices, not some fixed cost of running these facilities.

Older data centers often used evaporative cooling, spraying water to cool air, because it saved energy even though it used a fair amount of water. A 300-megawatt facility with this setup might use around 150 million gallons a year, comparable to irrigating about 550 acres of soybeans, and less than a similarly sized power plant using water for cooling. But newer facilities, built to handle far more powerful computer chips, have shifted to liquid cooling, where fluid runs directly to the chips. This lets the system carry heat away at higher temperatures, so it can often be released outside using dry coolers or closed-loop systems with little or no water at all. Many modern data centers now use water mainly for restrooms and kitchens rather than cooling.

The engineer noted that building a huge data center still uses water for things like dust control and construction, so some local water complaints may be real even if ongoing operations use little. For homeowners, there is no direct action here. This is background on a public debate over AI's resource footprint, not a program or rebate affecting household energy bills or upgrades.