This story unpacks cities with the highest amount of ozone, or “smog”, as per the American Lung Association’s recent State of the Air report.
Now that you are aware of how air quality is determined and how it affects you let’s dive into the most polluted cities in the United States.
Average number of high ozone days: 177.3.
Average number of high ozone days: 92.2.
Average number of high ozone days: 86.7.
Average number of high ozone days: 54.
Average number of high ozone days: 41.2.