### Question
How is the "best available controls" defined?


### Answer
The term **best available controls** is defined in *42 U.S.C. § 7511b* as follows -

> the degree of emissions reduction that the Administrator determines, on the basis of technological and economic feasibility, health, environmental, and energy impacts, is achievable through the application of the most effective equipment, measures, processes, methods, systems or techniques, including chemical reformulation, product or feedstock substitution, repackaging, and directions for use, consumption, storage, or disposal

#### Citation:
  - *42 U.S.C. § 7511b*
  - Heading: **CHAPTER 85-AIR POLLUTION PREVENTION AND CONTROL > SUBCHAPTER I-PROGRAMS AND ACTIVITIES > Part D-Plan Requirements for Nonattainment Areas > subpart 2-additional provisions for ozone nonattainment areas**

