New Mexico
Environment Department

Contact Information:
(505) 827-2855 MAIN // 1-800-219-6157 (toll free)
Environmental Emergencies:
505-827-9329 (24 hrs)

Surface Water Quality

2013 Triennial Review

Executive Summary: The New Mexico Environment Department (NMED) petitioned the Water Quality Control Commission (WQCC) at its July 8, 2014 regular public meeting to conduct the triennial review of New Mexico’s Water Quality Standards, 20.6.4 NMAC.  A review of the Standards on a three-year basis is required by Section 303(c) of the federal Clean Water Act (CWA).  Along with the petition, NMED presented its proposed amendments and narrative explanation.  The Boards & Commissions Administrator docketed the matter as WQCC 14-05(R).  The changes made during this Triennial Review included: 

  • Segment-specific standards for aquatic life protections in the Mimbres and San Juan River basins;
  • A new temporary standards provision in NMAC;
  • Updates to the piscicide provision in NMAC for applications under the EPA permit program and for public input or hearing requests when applications are not covered under an EPA permit;
  • Listing of ephemeral waters under Section NMAC pursuant to Subsection C of Section NMAC; and
  • Clarifications of criteria applicability, updates to methods and corrections of grammatical errors.


Document Author Date
Public Notice SWQB April 28, 2014
Public Comment Draft  SWQB April 28, 2014
WQCC Hearing Petition Request SWQB June 25, 2014
Order for Hearing WQCC July 8, 2014
Scheduling Order WQCC July 10, 2014
Procedural Order WQCC July 10, 2014
Hearing Notice in NM Register SWQB October 30, 2014
Pleading Log for WQCC 14-05(R) WQCC Various Dates of Filing
Scheduling Order Modified WQCC January 30, 2015
Hearing Notice for Newspaper  SWQB ~August 1, 2015
Hearing Transcripts (Vol. 1, 2, 3 and 4) WQCC October 13-16, 2015
Final Order and Statement of Reasons WQCC January 10, 2017
Integrated Rule 20.6.4 NMAC  SWQB March 2, 2017
Submittal Letter to EPA SWQB  
EPA’s Response and Technical Support Document (TSD) EPA June 8, 2017
EPA’s Approval for CWA and Revised TSD EPA August 11, 2017
WQCC Response to TSD WQCC