### Question
How is the term area source defined?


### Answer
The term **area source** is defined in *42 U.S.C. § 7412* as the following:

> any stationary source of hazardous air pollutants that is not a major source

#### Citation:
  - *42 U.S.C. § 7412*
  - Heading: **CHAPTER 85-AIR POLLUTION PREVENTION AND CONTROL > SUBCHAPTER I-PROGRAMS AND ACTIVITIES > Part A-Air Quality and Emission Limitations**

