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With four areas of the U.K. now facing drought conditions, from the University of Surrey shows that helping households use less water means first understanding their everyday habits—and getting the public onboard attempts to change those habits.

A collaboration between Surrey academics and more than 100 professionals across the water sector has revealed a major knowledge gap: despite government targets to cut household demand, the sector still has many unanswered questions about how to change behavior.

England is projected to face a daily shortfall of 5 billion liters of freshwater by 2055. The Environment Agency plans to meet 60% of that gap through demand reduction—but there's growing recognition that achieving this will require more than just installing smart meters and fixing leaks.

Led by researchers at the University of Surrey's Institute for Sustainability, the project brought together stakeholders from 60 organizations—including nine U.K. water companies, policy bodies, manufacturers and innovators. Through workshops, surveys and webinars, they identified 24 pressing questions the sector must answer before it can roll out effective strategies for reducing domestic water use.

Professor Benjamin Gardner, lead author of the white paper and Professor of Psychology at the University of Surrey, said, "Most people don't know how much water they use. The sector has focused on smart meters, which will raise awareness of water use—but smart meters alone won't cut it.

"The real challenge is in helping people to better recognize and understand how they use water and supporting them to continue doing their everyday activities, but in a more water-wise way. To do that, the sector needs to make better use of behavioral science."

The study highlights three priority areas for action:

• Partnering with behavioral scientists to understand how people make water-use decisions and what influences them.

• Improving knowledge sharing across the sector to accelerate learning and collaboration.

• Using smart sensors to better understand water usage behind-closed-doors—to unobtrusively gain accurate insight into domestic habits—such as toilet flushing and showering—which are difficult to measure via self-reporting.

Dr. Pablo Pereira-Doel, co-author of the white paper and Human Insight Lab co-lead at the University of Surrey, said, "Technology and behavior change should work hand in hand. We need to design solutions that fit into real people's lives—that means understanding the barriers they face, the routines they follow, and what actually motivates change. The sector has the tools, but to use them effectively, it must put people at the heart of the strategy."

The behaviors ranked most important to address were fixing in-home leaks, reducing shower length, and improving toilet flush habits. But the researchers stress that simply encouraging people to use less water won't work without a solid understanding of the psychological and social factors that shape behavior.

This white paper presents a shared research agenda to help the sector make informed, evidence-based choices—integrating behavior change with technological solutions to secure the U.K.'s water future.

Nicci Russell, CEO of Waterwise, the U.K.'s leading independent voice on water efficiency, said, "Understanding how people use water in their daily lives is absolutely essential if we're going to close the growing gap between supply and demand. Consumer culture has shifted dramatically over the past few decades, and our water systems simply haven't kept pace.

"Research into behavior helps us design smarter policies, technologies and communications that support people to use water more wisely. We can't afford to ignore the human factor. Water efficiency isn't just about infrastructure—it's about people, choices, habits, and values. We must meet people where they are, and that starts with understanding what drives how we use water at home and at work."