EU proposes energy and water rating labels for big data centres

The European Commission proposed rules requiring European data centres of 500 kilowatts and above to disclose energy and water efficiency under a new EU labelling scheme, as Brussels plans to roughly triple data-centre capacity to support AI while worrying about grids and water.

HARDWARE desk — Europe is trying to grow AI compute capacity and force transparency on the power and water those buildings burn, before any hard efficiency floors land.

The proposal targets facilities with a capacity of 500 kW and above. Operators would have to disclose energy and water efficiency using an EU-designed labelling system. 500 kW means 500 kilowatts of IT load — the power the computers inside the building draw, not the offices around them. File the 500 kW cutoff and the labelling system as Reuters’ and Euronews’. This desk did not measure a site.

The scheme does not impose limits on total energy or water use, and it does not require data centres to disclose their total power use. File that no-limits and no-total-power line as Reuters’. A label that says how efficient a building is, is not a cap on how much it may burn. Do not read this publication as a consumption ceiling. None is in the rule Reuters describes.

Operators would also disclose how their water use sits against water stress in the local area, and whether they can offer services to the local energy system, such as reusing waste heat. Water stress means the local area is already short of water. Waste heat is leftover warmth from the servers, which a site might send into a local heating network. File those two disclosure lines as Reuters’.

Why Brussels is moving, still Reuters: the EU wants to triple its data-centre capacity over the next seven years, to support artificial intelligence and to cut reliance on US Big Tech. That growth, Reuters says, risks straining power grids, depleting water, and raising CO2 emissions if the buildings’ energy and water use is not controlled. The rating scheme is meant to make efficiency public, so companies have a reason to build cleaner facilities. File the triple-over-seven-years ambition and the grid, water, and CO2 risk as Reuters’. This desk is not forecasting a build-out.

Scale, still Reuters, citing an EU report from June: data centres currently account for around 2.5% of EU electricity. That share is expected to jump. Capacity is expected to more than double by 2030, to 28 gigawatts from 12 GW last year. A gigawatt is a billion watts — the size of a large power plant or a whole computing campus, not one server. File the 2.5%, the more-than-double line, and the 28 GW / 12 GW pair as Reuters’, from that June report. Do not collapse “more than double, to 28 GW by 2030” into the separate “triple over seven years” ambition. They are two different sentences in the same wire.

Euronews, the same day, uses a different clock for the growth aim: Brussels wants to triple data-centre capacity by 2035. It also cites EU figures that European data centres used 68 terawatt-hours of electricity in 2024 and are expected to use 114 TWh by 2030 — about 3.2% of EU electricity, up from 2.5%. A terawatt-hour is a year’s worth of electricity. File the 2035 year and the 68 / 114 / 3.2% lines as Euronews’. Do not merge Euronews’ 2035 with Reuters’ seven-year line into one date. This desk did not add the meters.

EU countries and lawmakers have two months to object, Reuters says, or the rules enter into force. File that two-month window as Reuters’. Publishing the text on 21 Sep 2026 is not the same as stickers already on the buildings. This desk is not calling the label live today.

Minimum performance standards are still planned later. Euronews says the Commission is stopping short of a hard ceiling on energy or water, and that minimum performance standards — a floor, so new facilities are not built below a set efficiency — will be announced in 2027, according to a Commission official. Reuters says the new label could be a precursor for mandatory minimum standards the EU is still developing. File the 2027 floor as Euronews’, via that official, and the precursor line as Reuters’. The label is a transparency step first.

Do not claim hard consumption ceilings are already law. Do not invent a cap in kilowatts, litres, or a banned efficiency number. Do not treat a company’s lobby edits, a water-band request, or a confidentiality clause as Commission findings. Those are not in the Reuters account of the rule.

Plain English for the rest of the card: kW = kilowatts of IT load, the power the computers inside the building draw. GW / gigawatt = a billion watts. TWh / terawatt-hour = a year’s worth of electricity. delegated regulation = a Commission rule that can enter into force unless EU countries or the European Parliament object. labelling scheme / rating scheme = a public efficiency label, not a cap on power or water. water stress = the local area is already short of water. waste heat = leftover warmth from the servers. This filing is the published rating scheme. It is not a consumption ceiling.

PRIMARY here: the European Commission’s 21 Sep 2026 publication of the Delegated Regulation establishing a common Union rating scheme for data centres, Directorate-General for Energy — Tier A PRIMARY, the original record. INDEPENDENT: Reuters’ same-day Brussels dispatch by Kate Abnett, via the Global Banking & Finance Review syndication, plus Euronews’ same-day Marta Pacheco story. The publication of the regulation and annexes is the Commission page. The 500 kW labelling requirement, the no-limits and no-total-power lines, the water-stress and waste-heat disclosures, the triple-over-seven-years ambition, the 2.5% / more-than-double / 28 GW / 12 GW scale, and the two-month objection window are Reuters-attributed. The 2027 minimum-performance line, the no-hard-ceiling line, the triple-by-2035 phrasing, and the 68 TWh / 114 TWh / 3.2% figures are Euronews-attributed. NOT claimed: a hard consumption ceiling already in force, a cap in kilowatts or litres, a named efficiency grade this desk scored, that labels are already on buildings, that 28 GW is the same claim as tripling, a lobby edit as a Commission finding, that this desk read a meter or sat in the briefing, a stock tip, or investment advice. Distinct from the already-filed big-tech-ai-300bn-guarantees, emerald-ai-google-nvidia-aema, crusoe-3-9b-series-f, and google-finland-13-billion-ai-infrastructure.