This side event at the UN 2023 Water Conference will aim to galvanize action and leadership on systems strengthening for sustainable WASH services and bring additional partners to this initiative. The event will encourage Member States and other partners to make commitments to the Water Action Agenda and move towards high level political support to sector reforms and to strengthen accountability and systems change. The key messages of the event include the importance of political leadership, collaboration, and accountability to improve sustainability and strengthen systems for WASH services for all, for ever. The expected actions from the event include demystifying systems approaches, showcasing concrete actions for WASH systems strengthening, and making commitments towards sustainability and systems strengthening, including addressing climate change. The event will also discuss methods for monitoring progress and ensuring long-term success through collaboration and mutual accountability.