### Question
What does pollution mean?


### Answer
**Pollution** has the following meaning in *40 CFR § 401.11*:

> the man-made or man induced alteration of the chemical, physical, biological and radiological integrity of water.

#### Citation:
  - *40 CFR § 401.11*
  - Heading: **Title 40—Protection of Environment > PART 401—GENERAL PROVISIONS > CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)**

