CDC - 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.

Learn about the Air Quality Flag Program! Check out our new infographic!

Get your daily air quality forecastExternal

Particle Pollution Course

Evidence-based, Accredited Training for Healthcare Professionals

Air Pollutants

Learn about major air pollutants.

Smoke Sense

Download the 2018 Updated Smoke Sense App

Air Pollutants

Air Quality and Emergencies

Get information about wildfires, volcanic emissions (releases), and other events that can affect our air quality.

Air Quality Resources for Professionals

Helpful resources about air quality for public health professionals.

Infographics

Learn about the Air Quality Flag Program!

Ozone and Your Health

Learn how ground-level ozone can harm your health — and what you can do to protect yourself.

Particle Pollution

Read about the negative health effects of particle pollution — and find steps you can take to prevent them.

Public Health Issues

Find information on public health issues related to air quality, including asthma, heart disease and stroke, and more.

FEMA-Provided Trailer Study

In the aftermath of Hurricane Katrina, FEMA provided either mobile homes or travel trailers to displaced Gulf Coast residents who had lost their homes in the hurricane.

Page last reviewed: May 4, 2018

Content source: National Center for Environmental Health