EU proposes A-to-G energy and water efficiency labels for data centres

Energy and water rating system for data centres

The European Commission introduced a regulatory proposal on Monday requiring data centre operators across the European Union to disclose their energy and water efficiency metrics. Under the proposed framework, all commercial facilities with an electrical capacity of 500 kilowatts or higher must report operational data through an EU-designed rating scheme. The system uses an appliance-style classification scale graded from A in green for top-performing sites down to G in red for the least efficient. Rather than capping total power draw or mandating direct operational limits, the rating evaluates resource efficiency, local water stress impact, grid flexibility, and the integration of on-site clean energy. The resulting sustainability labels will be automatically generated from operator reports and published directly to an open EU database.

Grid pressures and computing capacity growth

The regulatory initiative aligns with European Union plans to triple computing capacity over the next seven years to support artificial intelligence development and reduce dependence on United States technology firms. A June European Union report determined that data centres currently consume roughly 2.5% of total EU electricity. Projections by the International Energy Agency suggest this sector will exceed 3% of overall European electricity demand by 2030, with total installed operational capacity expanding from 12 gigawatts last year to 28 gigawatts by 2030. European officials noted similar pressures in the United States, where rapid data centre expansion has driven up local utility bills and triggered public criticism ahead of midterm elections.

Tripling our data centre capacity cannot mean tripling the pressure on our grids, our water and our energy bills.

Waste heat integration and energy flexibility

To improve ratings under the system, facility operators are incentivized to provide secondary services back to the regional power network and urban infrastructure. The EU assessment includes specific criteria for re-routing waste heat into municipal heating networks and establishing additional zero-emission power generation on site. Commission estimates indicate that capturing and reusing approximately half of the aggregate waste heat generated by European data centres would cover the entire residential heating demand of four million European households. European officials maintain that such measures are necessary to reconcile expanding computing demand with the bloc's target of achieving net-zero greenhouse gas emissions by 2050.

To ensure that the digital transformation truly works for our society, we must address the growing energy demand of data centres.

Legislative path, transparency disputes, and future standards

The proposal follows controversy from April, when an investigation by journalist collective Investigate Europe reported that 2024 energy efficiency legislation allowed companies like Microsoft to avoid site-by-site environmental disclosures by publishing only aggregated national statistics. The Commission defended the previous provisions on business confidentiality grounds while committing to the current standardized label. EU member states and the European Parliament hold a two-month period to review and potentially object to the proposed rules before they enter into force. The first automated facility labels will debut publicly in 2027, followed by a formal efficiency review by late 2028 and a separate legislative proposal in spring 2027 establishing mandatory minimum performance standards for new and retrofitted data centres.