### Question
How is the "industrial source" defined?


### Answer
The term **industrial source** is defined in *42 U.S.C. § 7651a* as follows -

> a unit that does not serve a generator that produces electricity, a “nonutility unit” as defined in this section, or a process source as defined in section 7651i(e) [5](#7651a_5_target) of this title

#### Citation:
  - *42 U.S.C. § 7651a*
  - Heading: **CHAPTER 85-AIR POLLUTION PREVENTION AND CONTROL > SUBCHAPTER IV&ndash;A-ACID DEPOSITION CONTROL**

