Criteria Air Pollutants
The Clean Air Act requires EPA to set National Ambient Air Quality Standards (NAAQS) for six commonly found air pollutants known as criteria air pollutants. Together with state, tribal and local air agencies we work to attain the standards throughout the country.
Managing Air Quality
![](https://www.epa.gov/sites/default/files/styles/large/public/2017-08/particulate-matter.jpg?itok=uqCA0kfD)