Top 10 Dirtiest Cities in the World in 2018

7. Port au Prince, Haiti

Our Index Score: 37.5
It is the most populous city in Haiti. The capital has dangerous water and air contamination levels. Despite being central to the economic development of Haiti, Port au Prince lacks pollution controls. This has contributed to the prevalent environmental issues that bedevil the city.
The city has had various environmental disasters lately, including the 2010 earthquake, cholera outbreak and Hurricane Mathew. Cholera outbreaks are common, and are caused by the poor sanitation systems.
The other source of its dirt is its population; more than three million people. This large population contributes to the production of 5000 tons of solid waste every day. The worrying aspect is that public service usually collects a paltry 7% of the garbage produced.