Google’s single data center in Council Bluffs, Iowa consumed 1 billion gallons of fresh water in 2024. One facility. One year. Enough to supply every home in Iowa for five days.
The reason they need fresh water is pure chemistry. Evaporative cooling towers work by running water over hot surfaces and letting it evaporate. 80% of the water a data center pulls in literally vanishes into the atmosphere as steam. You can’t recycle steam.
The remaining 20% becomes concentrated mineral waste. Calcium, magnesium, silica. Every cycle through the cooling loop makes the water more corrosive. After enough passes, it starts clogging pumps and eating through heat exchangers. Multi-million dollar equipment destroyed by limescale.
Recycled wastewater carries even more of these minerals from the start. You could treat it, but less than 1% of U.S. water is recycled. Most cities don’t even have separate pipes to deliver reclaimed water to industrial customers. A data center wanting to use recycled water would essentially need to build its own treatment plant on site. Meanwhile, municipal potable water costs almost nothing.
So they just drink from the tap. Across all its data centers, Google used 8.1 billion gallons in 2024, nearly double what it used three years earlier. The company claims its water stewardship projects “replenished” 4.5 billion gallons. Those projects aren’t even in the same watersheds where they’re pulling the water. Same playbook as carbon offsets. Consume locally, offset globally, call it sustainable.
The trajectory is the real story. U.S. data center water consumption could quadruple by 2028. That’s 68 billion gallons for cooling alone, before the 211 billion gallons consumed indirectly through electricity generation. Two-thirds of new data centers since 2022 are being built in regions already facing water scarcity.
Nobody’s asking why they use fresh water. They’re asking what happens to the towns sharing a water main with a facility that drinks like 50,000 people showed up overnight.
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