Access to an improved water source refers to the percentage of the population with reasonable access to an adequate amount of water from an improved source, such as a household connection, public standpipe, borehole, protected well or spring, and rainwater collection. Unimproved sources include vendors, tanker trucks, and unprotected wells and springs. Reasonable access is defined as the availability of at least 20 liters a person a day from a source within one kilometer of the dwelling.
More than 2.6 billion people—over 40 per cent of the world’s population—do not have basic sanitation, and more than one billion people still use unsafe sources of drinking water.
Four out of every ten people in the world don’t have access even to a simple latrine.
Five million people , mostly children, die each year from water-borne diseases.