Repository of Documents

Arizona

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Title 18, Environmental Quality, Chapter 11, Department of Environmental Quality Water Quality Standards (PDF) (188 pp, 1.9MB): (Effective March 25, 2009) State regulation establishing water quality standards for surface waters of the state. Please note that not all parts of this document are effective for Clean Water Act purposes. See cover pages for more detailed information.; The corresponding provisions which are in effect for Clean Water Act purposes can be found in Title 18, Environmental Quality, Chapter 11, Department of Environmental Quality Water Quality Standards (2002) (PDF) (88 pp, 1.6MB) (Effective October 22, 2002). See cover pages for more info.
Amendments to Title 18, Environmental Quality, Chapter 11, Department of Environmental Quality Water Quality Standards (PDF) (14 pp, 108K): (Effective July 3, 2003) Amendments to water quality standards for surface waters of the state.
Implementation Guidelines for the Narrative Nutrient Standard (PDF) (28 pp, 2.1MB)
Implementation Guidelines for the State of Arizona Antidegradation Standard (PDF) (29 pp, 2.9MB)
Interim Whole Effluent Toxicity Implementation Guidelines for Arizona (PDF) (2 pp, 190K)
Federal Regulations, Section 131.31 (PDF) (2 pp, 124K): Federal regulations establishing nutrient water quality criteria and aquatic life uses for specific waterbodies in Arizona.