12. Eritrea
Percentage of population using improved drinking water sources: 57.80%
Next on our list of countries with least access to clean water is Eritrea. Not only does almost half of population of Eritrea not receive clean water, but the government does not even proffer the citizens basic human rights. According to Human Rights Watch, Eritrea is one of the worst countries in the world when it comes to human rights violation, with random arrests, lack of religious tolerance and unfair treatment in general. In fact, the nation has no independent non-governmental organizations since 2001!