Air Quality

Outdoor air quality has improved since the 1990s, but many challenges remain in protecting Americans from air quality problems. Ground-level ozone, the main part of smog, and particle pollution are just two of the many threats to air quality and public health in the United States.

a middle-aged man enjoying a breath of fresh air
Air Aware

Learn more about protecting your health.

Air Quality Flag Program
image of the Air Quality Flag Program infographic

The Air Quality Flag Program alerts school communities to local air quality forecasts so they can take actions to protect children, especially those with asthma.

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Page last reviewed: June 28, 2021