Water Quality Standards Regulations: Navajo Nation
Presented are water quality standards in effect for Clean Water Act (CWA) purposes for this tribe.
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 "Tribal 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. Additionally, please note the documents may also contain provisions that EPA does not have the authority and duty to act on under the Clean Water Act because the provisions are not water quality standards.
Authority to Administer Standards Program
This tribe was granted treatment in a manner similar to a state (TAS) on January 20, 2006. The tribe was also granted TAS on May 23, 2019, based on a supplemental TAS application, for additional lands.
Tribal Standards in Effect for CWA Purposes
The tribe’s initial water quality standards were approved on April 11, 2006. The standards include designated uses, antidegradation, and other policies and procedures establishing water quality standards for waters of the tribe.
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Navajo Nation Water Quality Standards (pdf)
(Effective March 17, 2021)
Federally Proposed or Promulgated Standards
- None at this time.