13. Mauritania
Percentage of population using improved drinking water sources: 57.90%
Mauritania, a country located in the midst of Northwest Africa, has actually done quite some work in the water department as its access percentage given above used to be 42% in 2000. An increase of almost 16% is commendable but clearly, the nation still has a long way to go before it is able to provide its entire population with clean water.