Number of people with and without access to an improved water source, World, 1990 to 2015

The absolute number of people with and without access to an improved water source. An improved drinking water source includes piped water on premises (piped
household water connection located inside the user’s dwelling, plot or yard), and other improved drinking water sources (public taps or standpipes, tube wells or
boreholes, protected dug wells, protected springs, and rainwater collection).