Types of improved source and the estimated proportion of the global population using these as their primary source of drinking-water.

Source: UNICEF/WHO [5].aHouseholds using bottled water as their primary source of water for drinking are generally considered to use an improved source if one of the above sources is used for washing and cooking. The JMP estimates that 6% of the urban population and 1% of the rural population primarily use bottled water as their source of drinking-water.bAn estimated 3% of the global population use surface waters and a further 8% use “other unimproved sources” such as tanker trucks, unprotected dug wells, and unprotected springs.cPublished estimates include do not distinguish protected and unprotected. In the absence of data we assumed half are protected.