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.
Learn about physical activity and air quality. Check out our new infographic!
Air PollutantsThe EPA has identified six pollutants as "criteria" air pollutants.
Air Quality and EmergenciesGet information about wildfires, volcanic emissions (releases), and other events that can affect our air quality.
Air Quality Resources for ProfessionalsHelpful resources about air quality for public health professionals.
Ozone and Your HealthLearn how ground-level ozone can harm your health — and what you can do to protect yourself.
Particle PollutionRead about the negative health effects of particle pollution — and find steps you can take to prevent them.
Public Health IssuesFind information on public health issues related to air quality, including asthma, heart disease and stroke, and more.
- Page last reviewed: April 2, 2014
- Page last updated: May 5, 2016
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