ADEQ: Arizona Department of Environmental Quality, Arizona's Official Web Site
Our mission is to protect and enhance public health and the environment
Water Quality Division: Monitoring & Assessment
The program fulfills Clean Water Act requirements for water quality monitoring and assessments. Specific activities include providing critical information on water quality conditions and establishing water quality standards. ADEQ staff collects water quality data on streams, lakes, and groundwater throughout the state. The data collected is used to support the state’s biennial water quality assessment report.
ADEQ's Assessment and Monitoring team sample a stream at Aravaipa Canyon Wilderness

Informative Links About Water Quality Monitoring





Arizona's Integrated 305(b) Assessment and 303(d) Listing Report describes the status of surface water in Arizona in relation to state water quality standards. The report contains a 303(d) list of Arizona's impaired surface waters requiring the development of a Total Maximum Daily Load (TMDL) and fulfills requirements of the federal Clean Water Act sections 305(b) (assessments), 303(d) (impaired water identification), and 314 (status of lake water quality).

The 2012/14 Status of Water Quality in Arizona 305(b) Assessment Report has been broken down into sections for easier viewing and downloading.

Maps depicting the Assessed and Impaired Waters are available for viewing via ADEQ’s Interactive GIS eMaps web application. The maps are located under "Water Quality."

NOTE: This report does not provide information about the quality of water being provided by Arizona's public drinking water systems. See Safe Drinking Water for more information.

Impaired and Not Attaining Waters Lists - The 2012/14 303(d) has been approved by EPA and is now final.

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