04 Port Harcourt, Nigeria
According to The National, Nigeria’s Port Harcourt international airport was recently voted the worst in the world. Its Mercer Health and Sanitation Index Score: 46.8*. They explain the staff is unhelpful; there is a lack of seating, broken air conditioning and a tent for an arrivals hall. Compared to the entire city, the airport is nothing. The people living in Port Harcourt are at a serious health risk because waste disposal is contaminating Nigeria’s rivers.