The European Commission has introduced a new rating system for data centers to track energy and water efficiency. Facilities will be assigned grades from A to G based on their Power Usage Effectiveness (PUE) and Water Usage Effectiveness (WUE) metrics. These ratings will be generated automatically using data that operators with at least 500 kW of IT capacity are already required to report.
The first electronic labels are scheduled to be generated by August 15, 2027, with annual updates to follow. For energy efficiency, a PUE of 1.15 or lower earns an A grade, while values above 1.9 receive a G. For water usage, an A grade requires a WUE of 0.1 or less, whereas values exceeding 1.0 are categorized as G. Labels will also include information on renewable energy sources and heat reuse.
Data centers currently account for approximately 2.5% of the European Union's total electricity consumption. The European Commission projects that total installed capacity will rise from 12 GW in 2025 to 28 GW by 2030, driven largely by the expansion of artificial intelligence and high-performance computing.
The European Commission has also initiated a 12-week public consultation process to develop mandatory minimum efficiency standards for data centers. Proposals are being accepted until December 14, with formal legislative initiatives expected in the second quarter of 2027. These future regulations may set specific performance thresholds for both new and existing facilities.
