The world’s water has never been under greater pressure, with unprecedented demands for use in human consumption, agriculture, industry and power generation. How can a growing global population ensure that water remains available, clean and sustainable? The Water Integrity Global Outlook 2016 (WIGO) captures a growing recognition of the need for good governance and measures to eliminate corruption to improve sector performance. It emphasizes the need for transparency, accountability and participation (TAP) to achieve the UN Sustainable Development Goals (SDGs), particularly SDG 6 on water and sanitation. WIGO highlights how institutional fragmentation and corruption undermine resources and services. It demonstrates how integrity and good governance have become international and national priorities and outlines tools and techniques that make improvements achievable. It makes recommendations for action by governments, sector actors, the private sector and civil society bodies.