8. Milwaukee, WI
Major Causes of Pollution: 3 (Heavy Industry, Lake Dumping, Traffic Congestion)
One of the main industries in the largest city in Wisconsin is the heavy industry, contributing to pollution in different areas of the Milwaukee. Lake Michigan remains as a hazard and danger to citizens that fish and water may prove deadly. As such the government has put heavy restrictions on how much one can eat from the lake. The city is also one of the dirtiest in terms of air pollution and chemicals and dust can be tasted from the air despite the wind bought about by the nearby lake.
There are more polluted cities to see as we continue this list of 16 dirtiest cities in America.