On a Sunday morning in July 2026, passengers arriving at Gatwick Airport, the UK's second busiest, found a surreal scene: toilets locked, restaurants shuttered, and travellers sitting on floors because there was nowhere else to go. A power failure at a water treatment works had cut off running water to both terminals, turning a routine departure into a scramble for bottled water and basic hygiene. For anyone who has ever relied on an airport's infrastructure, the question is: how can something as fundamental as water disappear from a major transport hub, and could it happen again?
Water supply disruptions at airports are rare but not unheard of, and they expose a hidden vulnerability in the systems that keep travel running. At Gatwick, the problem began with a power outage at SES Water's Bough Beech treatment works, which supplies water to parts of Kent, Surrey, south London, and the airport itself. Without electricity, the treatment plant could not process water, and the network lost pressure. SES Water described the situation as "a highly unusual and complex issue," and even after power was restored, it took hours for the system to refill and treat water before it could flow again. While flights continued to operate, every other service that depends on running water—toilets, bars, restaurants, hand-washing stations—was forced to close. Staff handed out bottled water for drinking, but that did little to solve the sanitation problem.
“Why a power failure at a water works left Gatwick's toilets and restaurants closed—and what it reveals about airport infrastructure vulnerability.”
Why do airports depend so heavily on a single water supplier? Airports are like small cities: they need massive, continuous water supplies for drinking, flushing, fire safety, and food preparation. Most are connected to the public water grid and rely on local treatment works, just like any town or business. When that supply fails, there is rarely a backup—airports do not typically have on-site reservoirs or independent treatment facilities. Gatwick's contingency plan involved distributing bottled water and deploying additional staff to help passengers, but that could not restore flushing toilets or reopen closed restaurants. Passengers reported confusion, with some saying they saw no announcements or bottled water distribution, and others noting that lounges and seating areas were also closed, leaving families with no option but to sit on the floor.
For UK readers, this incident matters because Gatwick is a gateway for millions of holidaymakers and business travellers every year. While the outage did not cause flight cancellations, it turned the passenger experience into an ordeal. The disruption also affected homes and businesses in the surrounding area, as SES Water reported interruptions in postcode areas TN11, RH1, RH6, and RH10. The broader lesson is that critical infrastructure—including water supplies to major transport hubs—is vulnerable to a single point of failure. Airports, water companies, and regulators may now face pressure to review resilience plans, such as installing backup water storage or emergency connections to alternative supplies.
Q: What causes water outages at airports? Water outages at airports are most often caused by problems in the public water network, such as power failures at treatment works, burst mains, or contamination events. In Gatwick's case, a power failure at a water treatment works stopped the supply of treated water to the airport and surrounding areas.
Q: Why can't airports simply use bottled water for toilets? Bottled water can be handed out for drinking, but toilets require large volumes of water to flush—typically 6–9 litres per use—and airport plumbing is not designed to be filled manually. Without running water in the pipes, toilets cannot be flushed, and alternative sanitation systems (like chemical toilets) are not practical in an airport terminal.
Q: How common are airport water outages in the UK? Major water outages at UK airports are very rare. This was a highly unusual event, described by SES Water as a "complex issue." However, smaller disruptions, such as temporary low pressure or maintenance shutdowns, can occur, though they are usually resolved quickly and often go unnoticed by the public.
What happens next? SES Water has restored power and treatment at Bough Beech, but the company warned it would take time for the full network to return to normal. Gatwick Airport said it was working closely with the water company to minimise future impacts. The incident may prompt reviews of contingency planning at major transport hubs, particularly around backup water supplies and communication with passengers. For now, travellers are advised to check with their airport or airline for real-time updates, and perhaps pack a bottle of water—just in case.