### Question
How is the "NAAQS" defined?


### Answer
The term **NAAQS** is defined in *42 U.S.C. § 7602* as follows -

> national ambient air quality standard

#### Citation:
  - *42 U.S.C. § 7602*
  - Heading: **CHAPTER 85-AIR POLLUTION PREVENTION AND CONTROL > SUBCHAPTER III-GENERAL PROVISIONS**

