### Question
How is the term PM–10 defined?


### Answer
The term **PM–10** is defined in *42 U.S.C. § 7602* as the following:

> particulate matter with an aerodynamic diameter less than or equal to a nominal ten micrometers, as measured by such method as the Administrator may determine

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

