Water requires energy. When we move it, clean it, heat it and cool it—energy moves with it. These two precious resources come together seamlessly in our daily lives, but they can also jointly create significant energy savings. Unleashing the potential of the water-energy nexus will drive substantial energy savings to repower the EU while drastically reducing greenhouse gas emissions, says Hayati Yarkadas at Xylem Europe on Foresight Climate & Energy ahead of the first edition of the European Energy Efficiency Day.
The water-energy nexus refers to the link between energy use in water management and water use in energy production. Water and wastewater infrastructure account for 3.7% of the global electricity consumption. The good news is that any efficiency gains in one benefits the other.
And by using high-efficiency technologies, we can cut half of that energy consumption at zero or negative cost. This would be equivalent to removing 9.2 million fossil-fuelled cars per year and it would free up $40 billion to invest in other types of water infrastructure.
The nexus also holds the potential to generate large-scale energy and water savings across sectors and drastically reduce greenhouse gas (GHG) emissions—an important element to address the impending climate change crisis.
We must move to an energy-neutral wastewater sector to achieve climate neutrality in Europe.
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More information on Energy Efficiency Day here & Register here.
In a fast-changing political and economic environment, 2025 was a year of continued efforts to strengthen security, stability, and competitiveness for European businesses.
Throughout the year, our work demonstrated that energy efficiency is not only essential to achieving climate goals, but also a key driver of innovation, energy independence and sustainable long-term growth across Europe.
Strong engagement with policymakers, combined with the successful organisation of the 4th European Energy Efficiency Day, highlighted the importance of collaboration and dialogue in advancing shared objectives. Partnerships across sectors and institutions remained central to delivering impact and shaping effective energy policies.
Looking ahead to 2026, we will intensify our efforts to secure the regulatory certainty that can accelerate the energy transition, while providing businesses with the investment confidence they need and strengthening Europe’s competitiveness.
Read the full Activity Report here.