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!
cars and pollution coming from them

Particle Pollution Course

Evidence-based, Accredited Training for Healthcare Professionals

City Fact Pollution

Air Pollutants

Learn about major air pollutants.

Wildland Fire Sensors Challenge

Winners Announced!

Wildland Fire Sensors Challenge

Page last reviewed: May 4, 2018