Atlanta-Sandy Springs-Roswell, GA
- High ozone days per year: 37
- No. of days with unhealthy particle pollution: 2
- People with asthma: 393,770
- Population: 5,882,450
A sprawling area that ranks among the cities with the longest commuting times in the nation, the Atlanta metro area amasses most of its air pollution from automobiles. The city’s public transit system has yet to provide adequate service to many of the area’s rapidly developing suburbs.