03 Dar es Salaam, Tanzania
Dar es Salaam is one of the dirtiest cities in Africa. Make sure you stay away from Coco Beach, which is covered in garbage and full of seaweed. Its Mercer Health and Sanitation Index Score is 40.4. The water quality is comparable to taking a swim in raw sewage. Dar es Salaam is also home to Black Indian Crows, a bird species that has eliminated other bird populations; even chickens aren’t safe.