The Mekong Region Water and Sanitation (MEK-WATSAN) Initiative was formulated in response to the GMS initiative as a collaborative effort between UN-HABITAT, the Governments of the Greater Mekong Sub-region and ADB. The objective of the MEK-WATSAN Initiative is to support the participating countries in the Greater Mekong Sub-region (GMS) attain their water and sanitation related Millennium Development Goals (MDGs).