The Mekong Region is now home to some 250 million people. Countries within the Greater Mekong Subregion (GMS) have witnessed rapid economic growth in recent years. The rapid growth has far outstripped the extension of basic services, such as water and sanitation, and the lack of these services is becoming a constraint to environmentally sustainable growth.
The urban population in the GMS is around 33.73 million, and it is estimated that around 24.53 million (72% of the total population) still do not have access to either safe water and/or adequate sanitation.