[Code of Federal Regulations]
[Title 40, Volume 21]
[Revised as of July 1, 2007]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR131.4]

[Page 402]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 131_WATER QUALITY STANDARDS--Table of Contents
 
                      Subpart A_General Provisions
 
Sec.  131.4  State authority.

    (a) States (as defined in Sec.  131.3) are responsible for 
reviewing, establishing, and revising water quality standards. As 
recognized by section 510 of the Clean Water Act, States may develop 
water quality standards more stringent than required by this regulation. 
Consistent with section 101(g) and 518(a) of the Clean Water Act, water 
quality standards shall not be construed to supersede or abrogate rights 
to quantities of water.
    (b) States (as defined in Sec.  131.3) may issue certifications 
pursuant to the requirements of Clean Water Act section 401. Revisions 
adopted by States shall be applicable for use in issuing State 
certifications consistent with the provisions of Sec.  131.21(c).
    (c) Where EPA determines that a Tribe is eligible to the same extent 
as a State for purposes of water quality standards, the Tribe likewise 
is eligible to the same extent as a State for purposes of certifications 
conducted under Clean Water Act section 401.

[56 FR 64893, Dec. 12, 1991, as amended at 59 FR 64344, Dec. 14, 1994]