EU Commission Accused of Withholding Data Center Energy and Water Usage Metrics

Key facts

According to reporting by Mathieu Pollet, civil society advocates and watchdog organizations have lodged a formal complaint targeting the European Commission's handling of data center environmental disclosures. The dispute stems from requests filed under European transparency regulations seeking access to detailed reporting submitted by data center operators operating within the bloc.

The complaint alleges that the European Commission has kept key operational figures—specifically precise metrics covering electricity consumption, municipal and surface water intake, power usage effectiveness, and waste heat reuse—out of public reach. Submissions collected under EU reporting mechanisms were intended to create an accessible public database evaluating the environmental footprint of digital facilities. However, regulatory authorities allegedly restricted access to or withheld these submissions, citing proprietary business concerns, trade secrets, or procedural delays.

Complainants maintain that by restricting public availability of this data, the European Commission has breached statutory obligations under EU legislation designed to enforce transparency in environmental decision-making. The legal challenge seeks to compel the Commission to publish complete environmental datasets without administrative redactions that obscure the resource strain of individual facilities or localized clusters.

Why it matters

The regulatory friction over data center transparency carries direct ramifications for European energy security, municipal resource management, and climate goal compliance. As the European Union pursues a binding target to achieve climate neutrality by 2050 and reduce greenhouse gas emissions by 55 percent by 2030 compared to 1990 levels, industrial energy consumption has come under intense scrutiny.

Data centers represent one of the fastest-growing categories of electricity demand within Europe. In major hub markets such as Ireland, figures from the Central Statistics Office demonstrate that data centers consumed 21 percent of all grid electricity in 2023, exceeding the power usage of all urban households combined. Similar pressures affect major internet exchanges across Germany, the Netherlands, and France. Beyond electrical grids, high-density server racks rely heavily on evaporative cooling systems, consuming millions of liters of potable water daily during peak summer temperature events.

Without verified public disclosure of energy and water footprints, local municipalities, urban planners, and environmental advocates are deprived of critical data required to assess grid strain, approve facility permits, or evaluate municipal water allocations. Furthermore, lack of transparency creates market distortions, enabling operators to present vague sustainability pledges without standardized third-party verification. The outcome of the complaint could establish a crucial precedent regarding whether commercial secrecy claims can override public rights to environmental impact data in the high-tech sector.

The legal framework governing environmental transparency in the European Union rests on international treaties and internal legislation. The 1998 UNECE Convention on Access to Information, Public Participation in Decision-Making and Access to Justice in Environmental Matters—commonly known as the Aarhus Convention—establishes that public authorities must make environmental data accessible without requiring applicants to prove a legal interest. Within the EU, this principle is institutionalized through Regulation (EC) No 1049/2001 on public access to documents and Regulation (EC) No 1367/2006 (the Aarhus Regulation), which explicitly apply these obligations to EU institutions, including the European Commission.

In parallel, the European Union updated its energy policy landscape through the recast Energy Efficiency Directive (Directive (EU) 2023/1791), which entered into force in late 2023. Article 12 of the directive mandated for the first time that operators of data centers with an installed IT power demand of at least 500 kilowatts submit annual environmental performance metrics to a dedicated European database starting May 15, 2024. The directive was intended to measure power usage effectiveness (PUE), temperature set points, water usage effectiveness (WUE), renewable energy utilization, and waste heat utilization.

The European Commission was charged with aggregating this data and publishing an annual report detailing the environmental footprint of digital infrastructure across the internal market. However, implementation has faced friction between corporate requests for confidentiality—driven by hyper-scale cloud vendors and colocation providers seeking to protect proprietary design specifications and commercial client volumes—and statutory mandates prioritizing environmental transparency.

Reaction

Following the legal filing reported by Mathieu Pollet, institutional and industry stakeholders are expected to respond across administrative and regulatory bodies. The European Commission typically reviews formal administrative complaints before deciding whether to grant internal review or defend its disclosure determinations before the European Ombudsman or the Court of Justice of the European Union in Luxembourg.

While official responses from Commission spokespersons were not detailed in the initial report, standard procedure dictates that the executive body must evaluate whether the requested documents contain commercial secrets protected under EU law or fall under mandatory environmental disclosure exceptions where public interest overrides commercial confidentiality.

Environmental advocacy non-governmental organizations and digital rights groups have long argued that corporate confidentiality exceptions should not apply to basic resource consumption data such as megawatt-hours consumed or volume of water extracted. Conversely, industry trade associations representing data center operators have traditionally argued that unredacted reporting could expose sensitive operational capacity and client server utilization rates to commercial competitors or raise physical and cybersecurity concerns regarding critical national infrastructure.

What we don't know yet

The reporting by Mathieu Pollet leaves several procedural and technical details to be determined as the legal process unfolds. It remains unconfirmed precisely which specific directorates-general within the European Commission—such as DG Energy or DG Connect—are identified as respondents in the filing, or whether the complaint was submitted directly to the European Ombudsman or as an application to the General Court of the EU.

Additionally, the exact volume of facility data currently held within the Commission’s database remains unknown. It is unclear how many data center operators met the May 2024 reporting deadline, how many sought confidentiality exemptions, and to what extent national regulatory authorities contributed aggregated state-level figures. The scope of redactions applied to public-facing documentation also remains undisclosed, leaving open the question of whether the Commission intended to publish partial regional summaries rather than site-specific metrics.

What to watch

The progression of this dispute will hinge on several key legal and procedural milestones over the coming months:

This account is based on original reporting by Mathieu Pollet.