Water Quality Standards Regulations: Morongo Band of Mission Indians

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.

• What is a New or Revised Water Quality Standard Under CWA 303(c)(3)? - Frequently Asked Questions (pdf) (108.04 KB)

Authority to Administer Standards Program

The Morongo Band of Mission Indians was granted treatment in a manner similar to a state (TAS) on April 3, 2018.

Tribal Standards in Effect for CWA Purposes

The Tribe's initial water quality standards were approved on January 20, 2026.

• Morongo Band of Mission Indiana: Ordinance 39 - Surface Water Quality Protection Ordinance (pdf) (629.48 KB) (Effective January 20, 2026) Tribal regulations establishing water quality standards for surface waters of the tribe. Please note that not all provisions are in effect for CWA purposes. Refer to cover page for more information.

Federally Proposed or Promulgated Standards

• None at this time.