Increased uptake and use of data to inform decision-making and ensure accountability will be crucial for achieving SDG 6. Achieving universal access to safe and affordable drinking water requires extending access to the 844 million people who still lack even a basic water service. It also requires progressively improving the quality of sen/ices for the 2.1 billion people who lack water that is accessible on premises, available when needed and free from contamination. Universal access also implies providing access in services in schools, health-care facilities and other institutional settings.