The IWA World Water Congress & Exhibition is a high-profile event that attracts 5,000 water professionals, companies and institutions from across the globe. It is a biennial event organised by the International Water Association (IWA) that has been held in previous years in the cities of Montreal, Vienna, Beijing, Marrakech, Melbourne, Berlin and Paris. The event is a valuable and unique opportunity for the community of world-leading water professionals to meet, exchange ideas, explore the state of the art and debate the key issues underlying the science and practice of water. It is also where the entire water community congregates once every two years and where IWA specialist groups showcase their work and plan for future activities.