10. New Haven, CN
Major Causes of Pollution: 3 (Traffic Congestion, Improper Sewage Disposal, Chemical Dumps)
Many people can testify to the beauties of New Haven. However, the city experiences problems that make it one of the dirtiest cities in the country. New Haven is a convergence zone for traffic between New York and Boston. As a result, air quality has been low, and the city has been named as one of the most air polluted in the region. Sewage and other chemical dumps also fill the waters and a lot of people may not be aware of that. One should take care when eating seafood in the area even with the city being a hub for delicious seafood.
