Water Quality Standards Regulations: Louisiana

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 Louisiana Administrative Code (LAC) Title 33, Part IX, Chapter 11 - Surface Water Quality Standards ]
(Effective January 13, 2020) 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 Act purposes. View cover page for more information.

Federally Proposed or Promulgated Standards

40 CFR §131.41 Bacteriological criteria for those states not complying with Clean Water Act section 303(i)(1)(A)

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Louisiana Administrative Code (LAC) Title 33, Part IX, Chapter 11 - Surface Water Quality Standards (PDF)(58 pp, 2 MB)