CH₄ + 2 O₂ → CO₂ + 2 H₂O

Keep that line in view. It’s high-school chemistry, it’s worth about two billion dollars, and almost nobody making decisions about data centers has ever been shown what it means.

A $2 billion project just died over water. Here’s the part nobody said out loud.

This year, county commissioners in Palm Beach County, Florida voted down a two-billion-dollar data center. A deciding concern, according to the record: unclear water estimates. The commissioners weren’t wrong to ask. Data centers built the ordinary way drink shocking amounts of water — millions of gallons a day for evaporative cooling in the big campuses — and towns from Texas to Virginia are lining up at podiums to say no.

Here’s the thing, though. The water problem everyone is fighting about is not a law of physics.

It’s a cooling design choice.

You’re kidding, right?

No. Look at the formula again. When you burn natural gas — the fuel most of these new power plants run on — the products are carbon dioxide and water. Burn one pound of methane and you create 2.25 pounds of water vapor. That’s not a trick. That’s what combustion is.

At almost every gas plant in America, that water goes straight up the stack and out into the sky. Vented. Wasted. Meanwhile, the data center next door runs evaporative chillers that drink the county’s aquifer to stay cool, and everyone stands in a hearing room yelling about it.

Now design the plant differently. Add condensing flue-gas recovery — known engineering, not science fiction — and you capture that combustion water instead of venting it. Run the numbers with every assumption on the table and it comes to roughly 78 to 103 gallons of new water for every megawatt-hour generated. Use the exhaust heat to drive absorption chillers — the same technology as a propane refrigerator, scaled up — and the servers get their cooling from waste heat, with zero evaporative water loss. Freeze some of that heat-made cold into ice overnight and you’ve built the cheapest battery ever invented, out of exhaust.

A campus designed this way doesn’t draw down the aquifer.

It makes water.

The one question every county board should ask

If you sit on a commissioners court, a city council, or a utility board anywhere a data center is proposed, you don’t need an engineering degree. You need one question:

“Is your cooling design evaporative — and if so, why?”

An applicant who can’t answer hasn’t done their engineering. An applicant who can deserves a different conversation than the one happening in hearing rooms right now. Either way, your county stops being told there are only two options — jobs or water — when the truth is you can have both, on purpose, by design.

The math, in public, with our name on it

Every number above is published with its assumptions stated — the reaction stoichiometry, the fuel heating values, the heat rates — on a live page you can check yourself: the Water Balance panel. If you find an error, tell us. That’s how numbers are supposed to work.

Who’s saying this?

We’re ArkLight Power, a Texas company that designs and operates behind-the-meter power for data centers — generation that goes in next to the facility, in months instead of interconnection-queue years, engineered from the first drawing to capture its water, hand back its cooling, and store its cold. One burn, three streams: power, cooling, water. We wrote this because the wrong story is winning votes, and boards deserve to decide with complete information.

Questions — from a county, a developer, or a newsroom — reach us at b@arklightpower.org. If your board wants the engineering presented in person or by video, no charge and no project on your docket required: ask.

CH₄ + 2 O₂ → CO₂ + 2 H₂O
Do you believe in science?