11. Haiti
Percentage of population using improved drinking water sources: 57.70%
One of the few non-African countries on our list, Haiti was all over the news when in 2010, it got hit by a devastating earthquake, which according to different estimates caused the deaths of anywhere between 100,000 to 316,000 people! Maybe the destruction caused by the earthquake is the reason that the percentage of the population using improved drinking water sources actually reduced in the nation from 60.8% in 2000 to 57.7% in 2015.