Water Quality Standards Regulations: Confederated Tribes of the Colville Reservation

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

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 "Tribal 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.

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

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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)
• 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) (7 MB) , 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

• TAS Application for the Confederated Tribes of the Colville Reservation (pdf) (11.03 MB)
• Addendum Letter: TAS Application for the Confederated Tribes of the Colville Reservation (pdf) (521.37 KB)
• Fact Sheet: Confederated Tribes of the Colville Reservation Water Quality Standards Program Authority (pdf) (505.51 KB)

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Tribal Standards in Effect for CWA Purposes

• None at this time.

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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)
• Proposed Rule Federal Register Notice (pdf) (824.73 KB, July 15, 1988)
• Final Rule Federal Register Notice (pdf) (1.02 MB, July 6, 1989)