Datacentres Hit 6% of UK and US Electricity, Sparking Community Backlash
Summary
- • Datacentres now consume 6% of electricity in both the UK and US, double the 2% global average
- • Global datacentre electricity use rose 15% in two years as annual investment nears $1 trillion
- • IDCA warns political pushback intensifies once datacentres exceed 5% of a national grid
- • 13% of US datacentre power is wasted on unused 'zombie' services, totalling over 3GW
Details
Datacentres consume 6% of electricity in the UK and US, more than double the 2% global average
UK figure is 5.9%, US is 6%. Singapore (19%) and Lithuania (11%) face even heavier grid burdens. The global average stands at 2%, underscoring how concentrated the strain is in a handful of nations.
Global datacentre electricity use rose 15% worldwide over the past two years
This outpaces overall global electricity demand growth. The IEA separately estimated datacentre energy use rose 17% in 2025 alone, against a 3% rise in total global electricity demand — meaning datacentres are consuming a rapidly growing share of all new power generation.
Annual global investment in datacentres is approaching $1 trillion, nearly 1% of the global economy
The scale of capital flowing into datacentre construction reflects the AI infrastructure race among hyperscalers. This investment level also means political and regulatory decisions made now will have long-lasting effects on energy systems and local communities.
UK grid connection queue for new datacentres grew 460% in the first half of 2025
Developers are reporting waits of several years to connect to the national grid. The UK government in early 2025 estimated datacentres used 2.5% of electricity but predicted this would quadruple to roughly 10% by 2030 — a projection the current 5.9% figure suggests is on track or ahead of schedule.
IDCA warns political and community resistance intensifies once datacentres exceed 5% of national grid consumption
The IDCA's research identifies this 5% threshold as a trigger point for societal backlash. Both the UK and US have now crossed it. The association is calling on tech companies to increase transparency about their expansion plans to reduce community frustration.
13% of US datacentre electricity powers zombie services — unused apps never switched off — totalling over 3GW wasted
The IDCA report notes this inefficiency is likely replicated globally and worsens as cloud computing adoption rises. Eliminating zombie consumption in the US alone would free up more than 3GW — equivalent to several large power stations.
Physical attacks on datacentres in the Middle East have prompted operators globally to unify physical and cyber security strategies
The IDCA report flags datacentres as critical infrastructure now facing a dual threat. Operators are being pushed to treat physical security as inseparable from cybersecurity — a significant operational and cost shift for the industry.
Greenpeace UK warns unchecked AI expansion risks higher energy bills, greater water stress, and extended fossil fuel dependence
Greenpeace UK chief scientist Doug Parr called for mandatory environmental impact assessments, greater transparency on water and energy use, and a ban on new polluting plants built specifically to power AI — reflecting growing civil society pressure on regulators.
There are now an estimated 10,000 datacentres worldwide; Microsoft's Wisconsin facility is the largest at 1.2 million sq ft
Microsoft bills its Mount Pleasant, Wisconsin datacentre as the world's most powerful. The scale of individual facilities is growing alongside the total count, concentrating power demand and infrastructure risk in specific geographic clusters.
Google developers significantly understated the carbon impact of two proposed UK AI datacentres
The misstatement of emissions projections adds pressure on regulators to require independent environmental assessments rather than relying on developer self-reporting, reinforcing the IDCA's transparency call.
Stat = quantitative data point, Financials = investment/spending figures, Infrastructure = grid and physical capacity, Policy = regulatory and governance, Insight = analytical finding, Security Alert = threat or risk, Market Impact = broader economic or societal effect, Industry Update = company or sector development, Legal = compliance or regulatory breach
What This Means
AI-driven datacentre expansion has moved from a background infrastructure story to a front-line energy and political issue: the UK and US have crossed the threshold the IDCA identifies as a trigger for serious community and regulatory pushback, and grid capacity constraints are already creating multi-year bottlenecks for new construction. The combination of soaring consumption, documented waste, understated environmental disclosures, and now physical security threats means governments face mounting pressure to impose transparency requirements and environmental assessments on an industry that has largely self-regulated its expansion. For anyone tracking AI's real-world costs — energy, water, emissions, and grid stability — this data marks a clear inflection point where the infrastructure underpinning AI is becoming a mainstream policy problem.