[Code of Federal Regulations]
[Title 40, Volume 20]
[Revised as of July 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR143.2]

[Page 620-621]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 143_NATIONAL SECONDARY DRINKING WATER REGULATIONS--Table of Contents
 
Sec.  143.2  Definitions.

    (a) Act means the Safe Drinking Water Act as amended (42 U.S.C. 300f 
et seq.).
    (b) Contaminant means any physical, chemical, biological, or 
radiological substance or matter in water.
    (c) Public water system means a system for the provision to the 
public of piped water for human consumption, if such a system has at 
least fifteen service connections or regularly serves an average of at 
least twenty-five individuals daily at least 60 days out of the year. 
Such term includes (1) any collection, treatment, storage, and 
distribution facilities under control of the operator of such system and 
used primarily in connection with such system, and (2) any collection or 
pretreatment storage facilities not under such control which are used 
primarily in connection with such system. A public water system is 
either a ``community water system'' or a ``non-community water system.''
    (d) State means the agency of the State or Tribal government which 
has jurisdiction over public water systems. During any period when a 
State does not have responsibi1ity pursuant to section 1443 of the Act, 
the term ``State'' means the Regional Administrator, U.S. Environmental 
Protection Agency.
    (e) Supplier of water means any person who owns or operates a public 
water system.
    (f) Secondary maximum contaminant levels means SMCLs which apply to 
public water systems and which, in the judgement of the Administrator, 
are

[[Page 621]]

requisite to protect the public welfare. The SMCL means the maximum 
permissible level of a contaminant in water which is delivered to the 
free flowing outlet of the ultimate user of public water system. 
Contamimants added to the water under circumstances controlled by the 
user, except those resulting from corrosion of piping and plumbing 
caused by water quality, are excluded from this definition.

[44 FR 42198, July 19, 1979, as amended at 53 FR 37412, Sept. 26, 1988]