Traditional Air Quality Indices Apr 28, 2012 9:32:05 GMT -5 Quote Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by Lisa Petrison on Apr 28, 2012 9:32:05 GMT -5 Here is a list of the most polluted cities in the U.S. (according to government criteria).www.forbes.com/sites/morganbrennan/2012/04/27/americas-most-polluted-cities/