In the perspective of the World Water Day 2011 - "Water for Cities" (March 22, 2011), the Natural Resources Land and Water Division (NRL) of FAO has launched an inventory of environmental schemes provisioning water to cities. Up to date there have been several studies addressing the payment for watershed services around the world, conducted by various UN agencies, NGOs, etc. None of these studies so far has focused on the PES schemes providing the water supply for cities and industries, i.e. urban areas. In that sense this inventory is unique. The report offers a very useful inventory of identified PES - "water for cities" schemes around the world. The report can be used as basis for further pursuit of information and analysis of the most relevant cases at least, and possible replication of these cases, primarily in East Africa that has become an area of interest lately for the potential development of this market based scheme in order to address the water issues of the region.