According to a new WaSH (Water, Sanitation and Health) Performance Index developed by the Water Institute at the University of North Carolina at Chapel Hill’s Gillings School of Global Public Health, the Dominican Republic is among those countries showing stagnation or decline in recent years compared to their peers. Other countries that are also at the bottom of the list are the Gambia, Ghana, Samoa, and Timor-Leste.
Among the most populated countries in the world, Pakistan, China and Nigeria were top performers (ranked 5, 11 and 18 respectively). Conversely, Russia, the Philippines and India were bottom performers (ranked 72, 83 and 92).
The Index compares how countries are improving water and sanitation compared to best-in-class countries at similar levels of development, the Index provides a fair comparison of progress on them.
http://www.waterworld.com/articles/2015/05/new-index-reveals-unexpected-leaders-in-water-sanitation-progress.html