### Question
How does SUBCHAPTER N—EFFLUENT GUIDELINES AND STANDARDS define standard of performance?


### Answer
Under *40 CFR § 401.11*, **standard of performance** is defined as:

> any restriction established by the Administrator pursuant to section 306 of the Act on quantities, rates, and concentrations of chemical, physical, biological, and other constituents which are or may be discharged from new sources into navigable waters, the waters of the contiguous zone or the ocean.

#### Citation:
  - *40 CFR § 401.11*
  - Heading: **PART 401—GENERAL PROVISIONS > SUBCHAPTER N—EFFLUENT GUIDELINES AND STANDARDS > SUBCHAPTER N—EFFLUENT GUIDELINES AND STANDARDS**

