Air Quality Report: From Best to Worst in America.

Bergen County in northern New Jersey, which borders New York City, received a failing grade for its poor air quality, with 15 days of high ozone levels recorded from 2019 to 2021. The county is often congested with high levels of car and bus traffic due to its location near the George Washington Bridge, the busiest suspension bridge in the world. Trenton's Mercer County on the Pennsylvania border also earned a failing grade in the annual report with 10 days of high ozone days. The report, released by the American Lung Association, noted that the number of counties with failing air quality grades in New Jersey decreased from six to two since the period from 2017 to 2019 amid an improving trend nationwide.