More than 600 million people around the world lack improved drinking water sources, according to a June 2015 UNICEF and World Health Organization (WHO) report on sanitation and drinking water. The Joint Monitoring Program (JPM) formed by the two organizations has monitored sanitation and drinking water progress since it set the Millennium Development Goals (MDGs) 15 years ago. The MDGs challenged the global community to reduce the proportion of the population without safe drinking water and basic sanitation by half. Although the global target for drinking water was met in 2010, the least developed countries have yet to meet it.