Out of the California cities that ranked the worst for ozone and particle pollution in 2025, the Fresno and Sacramento ...

Reno and other Nevada cities ranked worse than Los Angeles for air pollution, according to the American Lung Association’s ...

More than 156 million Americans live among unhealthy levels of air pollution, an annual report from the American Lung ...

The most heavily polluted places remain on the West Coast, although the Canada wildfires made the air quality for dozens ... Oregon; Los Angeles-Long Beach; Sacramento-Roseville; Seattle ...