EU Label for Data Centres: How Europe Wants to Measure AI’s Hunger for Energy and Water

Europe is trying to put a number on something that has been hard to compare: how hungry a data centre is for power and water. The European Commission has drafted a mandatory sustainability rating that would work a bit like appliance labels, with reported data turned into a public score. If it survives the political process, it could start showing up in 2027.

The plan sits on Article 33 of the EU Energy Efficiency Directive and uses the existing European data centre database as its base. Facilities with at least 500 kilowatts of installed IT power demand would be in scope, while smaller sites could join voluntarily. The label would track Power Usage Effectiveness, Water Usage Effectiveness, and the renewable share of electricity, split into guarantees of origin, power purchase agreements and on-site generation.

The tricky part is the green electricity claim. Under the draft, guarantees of origin would have to line up with consumption in time, come from the same bidding zone, and be backed by generation assets no older than ten years. That is meant to stop operators from making a site look cleaner on paper by buying certificates alone. The labels would be generated automatically from reported data, updated once a year and published.

This is not just transparency theatre. The rating is meant to influence access to sustainable finance and public procurement, and it is also expected to feed into the planned Cloud and AI Development Act. That matters because the power draw is only heading one way: the International Energy Agency expects data centres worldwide to more than double their electricity use by 2030, to around 945 terawatt hours. Google’s own data centres, the source notes, went from 14.4 to 30.8 million megawatt hours in four years.

Europe is trying to avoid the uglier shortcuts seen elsewhere. In the US, gas is the quick answer when new grid links and renewables take too long, and that has brought air-pollution complaints, higher household bills and a lot of self-congratulation from people with turbines. In Europe, emissions trading, climate targets and pricey gas make that route less appealing, while grid capacity remains a bottleneck in places like the planned Google site in Kronstorf in Upper Austria. Nuclear is the other fallback, but it is a slow one, and the label does not treat it as renewable anyway.