At the current rate, the world will miss the MDG sanitation target by over 700 million people. Southern Asia and Sub-Saharan Africa are especially off track in terms of sanitation coverage. Various estimates of investment needs to meet the MDGs in developing countries were produced since the Millennium Declaration. The most recent estimates of financial needs for the sector by World Health Organization (see Hutton and Bartram, 2008, Pruss-Ustiin et al.,