News · 2026-10-01

Investigation exposes gaps in Europe’s data-centre resource reporting

Lighthouse Reports’ September 30 investigation found major gaps in access to European data-centre energy and water records, despite an existing reporting obligation. Separately, the European Commission says the first filing round received information from 770 sites, about 36% of its estimated eligible population. These findings expose weaknesses in collection and public visibility, but they do not establish a count of AI facilities refusing to report.

Key facts

• The Commission records 770 reporting sites in the May–September 2024 first round.
• That was about 36% of an estimated eligible population, with some lower national thresholds included.
• Lighthouse published its cross-border investigation September 30, 2026.
• The primary reporting source is Lighthouse Reports’ investigation, alongside the Commission’s official assessment.

Lighthouse Reports calls the investigation “Data Centre Silence.” Its reporters sought the information behind a familiar debate: how much electricity and water do data centres consume, and can communities inspect those costs when facilities expand? The issue matters to AI infrastructure, but the regulated population is broader than AI. A site can serve many customers and workloads, and these records do not label its consumption as model training or inference.

The investigation involved freedom-of-information requests across all 27 European Union member states and requests for underlying Commission data. Lighthouse says ten countries told reporters they did not hold figures for their own facilities, while six invoked blanket commercial confidentiality. Its methodology and legal argument explain the resulting transparency complaint. A filed complaint is not a ruling that the Commission violated environmental-information law.

The Dutch comparison is striking but needs careful reading. Records disclosed by RVO covered 104 facilities. The Dutch Datacenter Association estimated 186 commercial sites above the threshold at the end of 2025. Those figures suggest an inventory and visibility problem. They do not prove that exactly 82 facilities violated the reporting rule: one number counts disclosed records, while the other counts an industry-defined set of commercial facilities.

NL Times’ report adds that public electricity figures existed for 44 centres and water figures for 47. RVO reportedly said it held additional data for some sites but did not provide figures. That distinction prevents a missing value in a public spreadsheet from being treated automatically as an unsubmitted return.

Imagine a city trying to publish building energy use. Three problems can produce the same blank cell: the city has not identified the building, its owner has not filed, or the city has the number but withholds it. The remedy differs in each case. Better inventories solve the first, enforcement addresses the second, and disclosure rules govern the third. The European data-centre story includes all three possibilities rather than one verified list of refusals.

The Energy Efficiency Directive generally triggers reporting at 500 kilowatts of installed information-technology power demand. That refers to the nominal power of computing equipment, not simply the site’s grid connection or total building load. Annual reports include energy and water consumption, capacity, heat recovery, renewable energy, and other operational indicators. Sites used entirely for defense or civil protection are exempt.

The delegated regulation permits defined estimates or partial coverage where a colocation operator cannot obtain customer information. It also structures the Commission’s public release in aggregated form. A reporting system can therefore collect information without giving residents access to each named facility’s full consumption record.

The Commission’s assessment makes the completeness problem explicit. Its estimated denominator draws on several sources and includes lower thresholds used in some member states, including Germany. The reported 36% should not be converted into a precisely audited share of known sites above a uniform 500-kilowatt threshold. The Commission called for better compliance and accelerated enforcement.

Dutch RVO guidance also distinguishes confidentiality from non-compliance. Operators must justify withholding particular answers against the public interest. The legal materials reviewed establish an administrative route to require remediation, but not a fixed automatic euro fine that can responsibly be quoted for every missing return.

The strongest counterargument to Lighthouse’s transparency critique is that the reporting framework explicitly protects confidential commercial information and requires aggregated Commission publication. Lighthouse argues those protections are being applied too broadly under environmental-access obligations. That legal disagreement remains unresolved in the reviewed record.

For AI readers, the practical consequence is an evidence gap beneath ambitious infrastructure plans. Ground Truth’s coverage of Bain’s revenue scenario asks what would make a major buildout economically sustainable; resource disclosure asks what communities can verify about its physical costs. Better reporting would improve that debate. The caveat is that the current numbers describe data centres generally and cannot quantify AI’s own share of the footprint.

Primary source, verified: read the paper →

Ground Truth. (2026, October 1). Investigation exposes gaps in Europe’s data-centre resource reporting. Ground Truth. https://groundtruth.day/news/eu-data-centre-reporting-public-data-gap.html

@misc{groundtruth:eu-data-centre-reporting-public-data-gap,
  title  = {Investigation exposes gaps in Europe’s data-centre resource reporting},
  author = {{Ground Truth}},
  year   = {2026},
  month  = {oct},
  url    = {https://groundtruth.day/news/eu-data-centre-reporting-public-data-gap.html}
}

Topics: infrastructure · energy · water · transparency · policy