The European Union is turning data-centre sustainability reporting into a public labelling system.
The new delegated regulation establishes a common Union rating scheme for data centres. The reporting obligation is not new. The next step is the creation of electronic labels based on information that operators already communicate to the European database.
According to the European Commission, the broader package has three main parts: a report to the European Parliament and Council on data-centre energy efficiency, the rating scheme and label, and a public consultation on possible minimum performance standards for data centres.
The minimum performance standards consultation is open until December 14, 2026, with the Commission saying final publication of a proposal is planned for the second quarter of 2027. Those future standards could address energy efficiency, water use, waste-heat reuse, grid services and other sustainability criteria.
What operators already have to report
Under the existing framework, EU Member States must require owners and operators of data centres in their territory with installed IT power demand of at least 500 kW to make information on energy performance and sustainability publicly available. Delegated Regulation (EU) 2024/1364 introduced the European database and set the first reporting deadlines: September 15, 2024, then May 15, 2025, and every year after that.
The European Commission’s September 2026 report says the database includes information about the reporting data centre, operational information, energy and sustainability indicators, ICT capacity indicators and other reported metrics. Examples include energy consumption, water consumption, waste heat reused and renewable energy consumption.
The data is not treated as a public dump of every site-level KPI. Individual data-centre information remains subject to confidentiality protections, except for information that appears on the public label. The database also publishes aggregated information, including Member State-level figures.
What the new label will show
The first electronic labels are due to be generated by August 15, 2027, and every year after that. Each label will be automatically created by the European database for reporting data centres that have communicated the required information and key performance indicators.
The label will use Power Usage Effectiveness, known as PUE, and Water Usage Effectiveness, known as WUE, as core class indicators. The annexes to the new regulation set PUE classes from A to G, with class A at PUE of 1.15 or less and class G above 1.9. WUE classes also run from A to G, with class A at WUE of 0.1 or less and class G above 1.0.
The label is also designed to show wider context. The annexes list items such as the data-centre name, type, operator, reporting period, location, size category, QR code, entry into operation, energy-source breakdown, cooling degree days, whether the facility provides grid flexibility functions, and whether it is ready for waste-heat reuse.
That context matters because a single efficiency number can be misleading without location, climate, facility age, size and cooling choices. The annexes say each label will be accompanied by a Commission document explaining factors such as the relationship between PUE and climate, the trade-offs between PUE and WUE, the relevance of local water stress, and possible reasons a facility does not offer waste heat for reuse.
Why the EU is pushing now
The Commission’s report says EU data centres consumed 68 TWh of electricity in 2024 and are expected to reach 114 TWh by 2030, or 3.2% of EU electricity demand. It also cautions that those projections may be revised upward because of fast-growing digital services and AI adoption.
The first reporting period shows both progress and limits in the available data. The Commission says 770 data centres reported in the first reporting period, representing about 36% of the estimated EU total falling under the reporting requirement. Six Member States reported zero data centres, and five reported fewer than three, which limits the picture in those countries.
Data quality is another issue. The Commission says 70.1% of the reported data was deemed reliable after checks for plausibility, accuracy and consistency. It also reported preliminary data from at least 30% more data centres in the second reporting period, with a subsequent report still being prepared.
The reported performance data explains why labels and future standards are being considered. In the first reporting period, the average reported EU PUE was 1.36 based on reliable values from 681 data centres. The average reported WUE was 0.58, calculated from 458 data centres with reliable WUE values and total water consumption above zero. Only 67 data centres reported some waste-heat reuse, and the report says approximately 1.8% of total heat generated by data centres was being reused in the EU, while warning that this figure may not be fully representative.
What this means for cloud and AI buyers
The label is not a global rule for every cloud provider and does not automatically apply to facilities outside the EU. Its direct compliance burden sits with covered EU data-centre operators, with voluntary participation possible for operators of smaller data centres and facilities that have not yet entered operation under the new scheme.
The indirect effect may be broader. For enterprise technology procurement, the EU label could become another due diligence signal alongside security certifications, data-residency controls, service-level commitments and emissions reporting. For AI services in particular, it may give buyers and policymakers a more consistent way to discuss the power and water profile of the infrastructure behind compute-heavy workloads.
The system also gives local communities and governments more structured information as they evaluate grid capacity, cooling water demand and heat-reuse options. The Commission has framed the rating scheme as a resource for policymaking and procurement, not only as an environmental disclosure tool.
What happens next
The labels will normally remain valid until August 15 of the following year. If a Member State has not confirmed that reporting is complete by then, validity can be extended until reporting is completed and a new label is issued, or until December 31 of the same year at the latest.
The regulation will enter into force on the twentieth day after publication in the Official Journal of the European Union. It also requires the Commission to assess the regulation by December 31, 2028, and every three years after that, with possible revisions covering additional sustainability indicators, certification or auditing, low-emission energy treatment, label design and simplification.
The near-term signal is clear: data-centre electricity and water use is becoming less of a private facilities metric and more of a structured public reporting category in the EU. The first wave of labels in 2027 will show how much practical value the system delivers for regulators, operators, customers and communities watching the growth of AI-era infrastructure.
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