WQCC 25-75 (R) Triennial Review - Proposed Amendments to 20.6.4 NMAC, Standards for Interstate and Intrastate Surface Waters
The New Mexico Water Quality Control Commission (Commission) will hold a public hearing beginning at 9:00 a.m. on September 28, 2026, and continuing through October 1, 2026, as necessary. The Commission is receiving written comment on the proposed amendments to the rule at 20.6.4 NMAC until the adjournment of the hearing.
The federal Clean Water Act requires states to evaluate existing water quality standards (WQS), consider new scientific information, provide public participation opportunities, and amend WQS as necessary, every three years. This process is commonly referred to as the Triennial Review and culminates in a public hearing. NMED proposed amendments in this matter based on public comments on 20.6.4 NMAC, communication with the Environmental Protection Agency, federal guidance documents, monitoring and fish data, as well as internal comments and implementation concerns. The amendments include new and revised definitions, clarification of third-party rulemaking procedures and costs, revisions to segment descriptions to match hydrological breaks, WQS for wetlands, clarification of implementation language, updated references, as well as new or revised designated uses, criteria, and antidegradation requirements.
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The New Mexico Water Quality Control Commission (Commission) will hold a public hearing beginning at 9:00 a.m. on September 28, 2026, and continuing through October 1, 2026, as necessary. The Commission is receiving written comment on the proposed amendments to the rule at 20.6.4 NMAC until the adjournment of the hearing.
The federal Clean Water Act requires states to evaluate existing water quality standards (WQS), consider new scientific information, provide public participation opportunities, and amend WQS as necessary, every three years. This process is commonly referred to as the Triennial Review and culminates in a public hearing. NMED proposed amendments in this matter based on public comments on 20.6.4 NMAC, communication with the Environmental Protection Agency, federal guidance documents, monitoring and fish data, as well as internal comments and implementation concerns. The amendments include new and revised definitions, clarification of third-party rulemaking procedures and costs, revisions to segment descriptions to match hydrological breaks, WQS for wetlands, clarification of implementation language, updated references, as well as new or revised designated uses, criteria, and antidegradation requirements.
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