What started in 1991 as a symposium has grown into an international meeting place for scientists, policy makers, and private sector and civil society actors. Last year, around 3,200 participants from more than 130 countries gathered in Stockholm. During the week-long event, they network, exchange ideas and foster new thinking around the most pressing water-related challenges, ultimately inspiring collaborative action and bridging science, policy and practice. Organiser Stockholm International Water Institute (SIWI) aims to stimulate the development of innovative policies and scientifically based solutions to water- related challenges. Director Katarina Veem is impressed with the high level of participants and international engagement at World Water Week.