Most Polluted Cities in the US

Pollution in the United States

The American Lung Association released a list of the most polluted cities in the US. These cities have heavy particle pollution, a mix of tiny solid and liquid particles that are in the air we breathe. Particle pollution hurts lung function, causes breathing difficulties and can damage your heart.

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Review Date: 
January 6, 2014

Last Updated:
July 1, 2014