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Water: State, Tribal & Territorial Standards

Repository of Documents: Arizona


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Title 18, Environmental Quality, Chapter 11, Department of Environmental Quality Water Quality Standards (PDF) (133 pp, 2.9MB)
(Effective April 13, 2010) 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. EPA has not yet acted upon the nutrient control criteria included in this document.

In addition, there are standards related to the FBC, PBC, A&W, and FC designated uses, as well as the elimination of DWS criteria for strontium and tritium (radiochemicals) (R18-11-109.G.3 and G.4), and the elimination of numeric criteria for specific OAWs (R18-11-112.H) that have not yet been acted upon. Please see the cover page for a complete list of these standards.

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) (78 pp, 1.4MB) (Effective October 22, 2002). 

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 
Federal regulations establishing nutrient water quality criteria and aquatic life uses for specific waterbodies in Arizona.

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