The European Commission has proposed EU data centre ratings from A to G for electricity and water efficiency, while existing reporting requirements have captured only 36% of covered facilities.
The system would apply to data centres with capacity above 500 kW. Facilities would receive separate grades based on Power Usage Effectiveness (PUE) and Water Usage Effectiveness (WUE).
Commission figures show 770 data centres submitted information during the first reporting period from May to September 2024. That represented about 36% of the estimated facilities subject to the reporting requirements.
Coverage varied sharply across member states. Six countries reported no data centres, while five declared only one or two.
Germany had more than 450 facilities estimated to fall within the rules but reported just under 350. France had more than 250 estimated facilities and declared fewer than 150.
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The Netherlands reported fewer than 100 data centres, while Spain submitted information for fewer than 50. It is also consulting on minimum criteria for data centres and plans to present a proposal in 2027.
Data quality posed another problem. The Commission said 70.1% of the information submitted passed an assessment covering the plausibility, accuracy and consistency of reported indicators.
Officials said they had since received preliminary information from at least 30% more data centres. The Commission called on member states to fully implement Article 12 of the Energy Efficiency Directive.
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The European Commission has proposed separate A-to-G ratings for data-centre electricity and water efficiency, while only 36% of facilities covered by existing reporting rules submitted data in the first reporting period.
