Ground-level Ozone Pollution
Reducing ozone pollution makes breathing easier.
Ozone can be “good” or “bad” for health and the environment depending on where it’s found in the atmosphere.
Stratospheric ozone is “good” because it protects living things from ultraviolet radiation from the sun.
Ground-level ozone, the topic of this website, is “bad” because it can trigger a variety of health problems.
EPA regulations help states reduce ozone levels in outdoor air.
Setting and Reviewing the Standards
Air Quality Where You Live
- View current and forecasted air quality conditions across the U.S.
- Explore current locations of wildfires
- Review data from air quality monitors across the world
Note: AirNow is experiencing extremely heavy traffic and may be slow. Visit an alternate map showing air quality from fires.