Millennium Development Goal 7: Ensure environmental sustainability
Target 7C: Halve, by 2015, the proportion of people without sustainable access to safe drinking water and basic sanitation
Indicator 7.8: Proportion of population using an improved drinking water source
Despite an increase in drinking water coverage from 56 per cent in 1990 to 65 per cent in 2008, the population in Africa relying on unimproved drinking water sources increased from 281 million in 1990 to 344 million in 2008.

Even so, 285 million people in Africa have gained access to an improved drinking water source since 1990.
Source: AMCOW Snapshot of Drinking Water and Sanitation in Africa– 2010 Update
Reference: http://www.childinfo.org/files/Africa_AMCOW_Snapshot_2010_English_final.pdf, p3