Water Quality Standards Regulations: New Mexico

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

The EPA is posting these standards as a convenience to users and has made a reasonable effort to assure their accuracy. For each document listed under "State Standards in Effect for CWA Purposes", the EPA has made a reasonable effort to identify parts of the standards that are disapproved or are otherwise not in effect for CWA purposes. Additionally, please note the documents may also contain provisions that the EPA does not have the authority and duty to act on under the Clean Water Act because the provisions are not water quality standards.

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

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State Standards in Effect for CWA Purposes

• Standards for Interstate and Intrastate Surface Waters, Title 20, Chapter 6, Part 4 (2024) (pdf) (5.14 MB)
  (Effective June 13, 2024) 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. Refer to cover pages for more information. The corresponding provisions which are in effect for Clean Water Act Purposes can be found in the 2020 Standards:
  • Standards for Interstate and Intrastate Surface Waters, Title 20, Chapter 6, Part 4 (2020) (pdf) (1.48 MB)
    (Effective July 24, 2020) Not all standards are in effect for Clean Water Act purposes; refer to cover pages for more information.

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Federally Proposed or Promulgated Standards

• None at this time.