Overview

• Los Angeles, Bakersfield, and Fresno rank highest for ozone and particle pollution, according to the American Lung Association.
• Nearly 40% of Americans live in areas with failing air quality grades, particularly affected by particle pollution.
• Particle pollution is linked to severe health risks, including cardiovascular and respiratory diseases, and brain damage.
• West Coast cities, heavily impacted by industry and wildfires, dominate the list of areas with the worst air quality.
• Cities with the cleanest air, like Bangor and Honolulu, generally have lower population densities and less industrial activity.