New York-Newark-Jersey City, NY-NJ-PA
- High ozone days per year: 102
- No. of days with unhealthy particle pollution: 1
- People with asthma: 1,640,663
- Population: 20,320,876
Although the area’s public transportation system, including hybrid busses, curbs emissions, New York City’s greater metro area is still one of the most polluted in the country. According to the American Lung Association, stricter regulations on soot in the area could save 3,000 lives every year.