The UK's water crisis is a ticking time bomb, and the country's datacentre plans are at the heart of the problem. As the demand for AI and data storage soars, the water industry is sounding the alarm, warning that the government's plans are 'fatally flawed' and 'explicitly exclude' the water needs of datacentres. This is a critical issue that demands urgent attention, as the consequences of ignoring it could be dire.
The Water-Data Centre Conundrum
The relationship between water and datacentres is a complex one. Datacentres require vast amounts of water for cooling, and the more powerful the servers, the more water they need. This is a critical aspect of their operation, and it's not just about keeping things cool. Water is essential for the very functioning of these facilities.
Water UK, the trade body representing water companies, has highlighted a critical oversight in the government's plans. In their briefing to MPs, they pointed out that the government's water forecasts fail to account for the water demands of datacentres. This is a significant issue, as it means that the country's water resources are being managed without a full understanding of the impact of datacentres.
A Flawed Forecast
The briefing from Water UK is a stark reminder of the potential consequences of ignoring the water needs of datacentres. By excluding them from water forecasts, the government is essentially assuming that the country will always have enough water. But this assumption is flawed, and it's a dangerous one at that.
The Environment Agency's national framework for water resources, published in June 2025, also failed to include an estimate of the water demands of datacentres. This is a missed opportunity to address a critical issue, and it's a sign that the government is not taking the water crisis seriously.
The Impact of Datacentres
The impact of datacentres on water resources is significant. As Water UK pointed out, datacentres are already being built in water-stressed areas, with more than three-quarters located in the south and east of England. This is a worrying trend, as it means that the water crisis is being exacerbated by the very facilities that are meant to drive economic growth.
The trade body warned that any new datacentre growth in these areas 'may be impossible' without policy change. This is a critical issue, as it means that the government's plans for AI growth zones could be at risk. The pressure on the water network is already high, and adding more datacentres without addressing the water crisis could be a recipe for disaster.
The Water-Hosepipe Ban Conundrum
The situation is further complicated by the hosepipe ban, which has been imposed on millions of people in water-stressed areas. Water companies have cut leakage by around 40% since privatisation, but there is still a long way to go. The hosepipe ban is a necessary measure, but it's not a long-term solution.
Greenpeace has highlighted a shocking fact: water companies are wasting five times more water through leaky pipes than even a national hosepipe ban would save. This is a critical issue, as it means that the water crisis is being exacerbated by the very companies that are meant to manage water resources.
The Role of Datacentres
The role of datacentres in the water crisis is a complex one. On the one hand, they are a critical part of the digital economy, and their growth is essential for the future of AI. But on the other hand, they are a significant drain on water resources, and their impact on the water crisis cannot be ignored.
The government has designated datacentres as critical national infrastructure, but this could be a double-edged sword. While it ensures that datacentres are protected, it also means that water companies may be powerless to restrict their water use. This could risk datacentres being prioritised over households at times of peak water demand.
The Way Forward
The way forward is clear: the government must address the water crisis head-on. They must publish a drought hierarchy to set out which sectors are prioritised in times of water shortages. This is a critical step, as it will ensure that the water crisis is managed fairly and effectively.
The government must also take decisive measures to secure water supplies and meet higher demand. This includes record levels of infrastructure investment and building new reservoirs. But it also requires a long-term strategy to manage water resources effectively, and to ensure that the water crisis is not exacerbated by the very facilities that are meant to drive economic growth.
In conclusion, the UK's water crisis is a critical issue that demands urgent attention. The government must address the water needs of datacentres, and manage water resources effectively. Only then can we ensure a sustainable future for the country's digital economy, and for the people who depend on its water supplies.
