At the end of 2012, Forbes.com released a list of the 20 American cities considered the dirtiest in terms of groundwater pollution levels and air quality. Economic hardships have only exacerbated the problem in many of these metropolitan areas, and high pollution levels are detrimental to the overall quality of life for residents.
For those of you who aren’t aware, the Sperling rating below are based on an index where 1 is the worst and 100 is the best.
20. St.Louis, MO
Over 150 industrial sites dot the Missouri and Mississippi Rivers in this area, and chemicals are dumped into the rivers on a regular basis. The local Sperling Air Quality Index is 24, and the Sperling Water Quality Index is 44.