Authority to Administer Standards Program

The Confederated Tribes of the Colville Reservation (CTCR) were granted treatment in a manner similar to a state (TAS) by EPA on May 2, 2018.

• Press Release: EPA Approves Colville Tribes’ Application to Implement Water Quality Standards Program (May 3, 2018)
• [See Cover Letter and Decision Document: Approval of the Confederated Tribes of the Colville Reservation for TAS for Sections 303(c) and 401 of the CWA ], including the following:
  • Appendix A, Supporting Information
  • Appendix B, Responses to Comments
  • Appendix C, Maps of the Colville Reservation and Waters

EPA approved the CTCR application for TAS for CWA Section 303(c) Water Quality Standards (WQS) and 401 Certification programs for all waters within the boundaries of the Colville Reservation. EPA determined that the CTCR met the requirements of CWA Section 518(e) and 40 C.F.R. § 131.8, and therefore approved the tribe's application.

Materials from the Previous Comment Opportunity

• [See TAS Application for the Confederated Tribes of the Colville Reservation ]
• [See Addendum Letter: TAS Application for the Confederated Tribes of the Colville Reservation ]
• [See Fact Sheet: Confederated Tribes of the Colville Reservation Water Quality Standards Program Authority ]

Tribe Standards in Effect for CWA Purposes

At this time, there are no approved tribal water quality standards.

Federally Proposed or Promulgated Standards

• Federal Water Quality Standards Regulations for the Confederated Tribes of the Colville Reservation (40 CFR 131.35) (Effective August 7, 1989)
• [See Proposed Rule Federal Register Notice ]
• [See Final Rule Federal Register Notice ]

• Final Rule Federal Register Notice (PDF)(8 pp, 1 MB, July 6, 1989)
• Proposed Rule Federal Register Notice (PDF)(7 pp, 845 K, July 15, 1988)
• Cover Letter and Decision Document: Approval of the Confederated Tribes of the Colville Reservation for TAS for Sections 303(c) and 401 of the CWA (PDF)(22 pp, 7 MB)
• TAS Application for the Confederated Tribes of the Colville Reservation (PDF)(359 pp, 12 MB)
• Addendum Letter: TAS Application for the Confederated Tribes of the Colville Reservation (PDF)(2 pp, 534 K)
• Fact Sheet: Confederated Tribes of the Colville Reservation Water Quality Standards Program Authority (PDF)(2 pp, 518 K)