What cities in the US have air pollution advisory days? I just learned that Phoenix, AZ often as %26quot;Air pollution advisory days%26quot; in which people are cautioned to limit time outside due to poor air quality. What other cities in the US have similar systems?

Best Answer - Chosen by Voters

Philadelphia, Pa has it 67% 2 Votes

Other Answers (1)

• I think most cities in Southern California do. 33% 1 Vote