### Question
How does SAFETY OF PUBLIC WATER SYSTEMS define secondary drinking water regulation?


### Answer
Under *42 U.S.C. § 300f*, **secondary drinking water regulation** is defined as:

> a regulation which applies to public water systems and which specifies the maximum contaminant levels which, in the judgment of the Administrator, are requisite to protect the public welfare

#### Citation:
  - *42 U.S.C. § 300f*
  - Heading: **CHAPTER 6A-PUBLIC HEALTH SERVICE > SUBCHAPTER XII-SAFETY OF PUBLIC WATER SYSTEMS > Part A-Definitions**

