The WHO/UNICEF Joint Monitoring Programme for Water Supply and Sanitation (JMP) reports every two years on progress towards the drinking-water and sanitation target under Millennium Development Goal 7. This target calls for halving the proportion of the population without sustainable access to safe drinking water and basic sanitation between 1990 and 2015. Estimates presented in its 2012 update report describe the situation at the end 2010 and supersede those of the JMP update published in March 2010.