Water Quality Standards Regulations: Oklahoma

Presented below are water quality standards in effect for Clean Water Act (CWA) purposes for this state.

EPA is posting these standards as a convenience to users and has made a reasonable effort to assure their accuracy. Also, for each document listed under "State Standards in Effect for CWA Purposes", EPA has made a reasonable effort to identify parts of the standards that are disapproved or are otherwise not in effect for CWA purposes.

On this page:

State Standards in Effect for CWA Purposes
Federally Proposed or Promulgated Standards

State Standards in Effect for CWA Purposes

[See Oklahoma's Water Quality Standards (Chapter 45) ]
(Effective May 10, 2016) State regulation establishing water quality standards for surface waters of the State. Please note that not all parts of this document are effective for Clean Water Action purposes. See cover page for more detail.
[See Implementation of Oklahoma's Water Quality Standards (Chapter 46) ]
(State Effective Date of July 1, 2013) State regulation providing water quality standards implementation procedures.

Federally Proposed or Promulgated Standards

None at this time.

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Oklahoma's Water Quality Standards (Chapter 45) (PDF)(130 pp, 2 MB)
Implementation of Oklahoma's Water Quality Standards (Chapter 46) (PDF)(49 pp, 472 K)