Looking back on 25 years of water, sanitation and hygiene monitoring, the report provides a comprehensive assessment of progress since 1990. The MDG target for drinking water was achieved in 2010 but the world has missed the sanitation target by almost 700 million people. In 2015, 663 million people still lack improved drinking water sources, 2.4 billion lack improved sanitation facilities and 946 million still practice open defecation.