• State Standards in Effect for CWA Purposes
• Federally Proposed or Promulgated Standards

State Standards in Effect for CWA Purposes

• [See Title 18, Environmental Quality, Chapter 11, Department of Environmental Quality Water Quality Standards (2011) (PDF)]
  (Effective December 23, 2016) State regulation establishing water quality standards for surface waters of the state. Please note that not all parts of this document are effective for CWA purposes.  See the cover page for more information.
• [See Amendments to Title 18, Environmental Quality, Chapter 11, Department of Environmental Quality Water Quality Standards (PDF)]
  (Effective July 3, 2003) Amendments to water quality standards for surface waters of the state.
• [See Implementation Guidelines for the Narrative Nutrient Standard (PDF)]
• [See Implementation Guidelines for the State of Arizona Antidegradation Standard (PDF)]
• [See Interim Whole Effluent Toxicity Implementation Guidelines for Arizona (PDF)]

Federally Proposed or Promulgated Standards

• 40 CFR §131.31  Arizona

Top of Page

• Title 18, Environmental Quality, Chapter 11, Department of Environmental Quality Water Quality Standards (2016) (PDF)(67 pp, 828 K)
• Amendments to Title 18, Environmental Quality, Chapter 11, Department of Environmental Quality Water Quality Standards (PDF)(15 pp, 158 K)
• Implementation Guidelines for the Narrative Nutrient Standard (PDF)(29 pp, 2 MB)
• Implementation Guidelines for the State of Arizona Antidegradation Standard (PDF)(30 pp, 3 MB)
• Interim Whole Effluent Toxicity Implementation Guidelines for Arizona (PDF)(3 pp, 242 K)