Our water systems are facing unprecedented complexity, driven by climate volatility, urbanisation, population growth, and rising expectations from customers and regulators. Meeting these challenges requires more than infrastructure, it demands smarter, integrated systems. This keynote will explore how Severn Trent is leading a digital transformation through the concept of Connected Catchments: a shared digital ecosystem where data, models, and decisions interact seamlessly across sectors in real time. We will showcase how this approach enables predictive, collaborative, and cost-effective investment decisions by viewing the catchment as a circular system. Building on our existing capabilities, such as hydraulic models, digital twins, and data science, we are scaling up through modular platforms like the Common Data Platform and introducing advanced digital enablers. These include AI-driven predictive modelling, multi-modal data integration, synthetic data for resilience. Beyond technology, we will address the strategic and cultural challenges that underpin success: creating shared ontologies for interoperability, establishing ethical AI governance, and forging partnerships across sectors. We will also explore how regulatory frameworks can evolve to support innovation while safeguarding public and environmental interests. This keynote will demonstrate that Connected Catchments is not a distant vision, it’s the next logical step in our roadmap to deliver smarter, sustainable water management. Attendees will leave with insights into how AI and digital ecosystems can transform infrastructure planning and unlock value through collaboration.