To protect and enhance public health and the environment in Arizona.

• Through consistent, science-based environmental regulation; and clear, equitable engagement and communication;
• With integrity, respect, and the highest standards of effectiveness and efficiency;
• Because Arizonans treasure the unique environment of our state and its essential role in sustaining well-being and economic vitality, today and for future generations.

Learn More about ADEQ | View > 

ADEQ has focused on five strategic issues that led to the creation of five-year tangible outcomes that benefit public health and the environment.

• June 2 | ADEQ Comments on the March 24, 2025, WOTUS Notice: The Final Response to SCOTUS | View Letter >
• May 21 | ADEQ Comments on continued funding for the Colorado River Basin Salinity Control Program | View Letters >
• April 4 | ADEQ Comments on the draft National Recommended Ambient Water Quality Criteria for the Protection of Human Health for PFAS | View Letters >
• February 24 | ADEQ Comments on the EPA's draft revisions to the Water Quality Standards Handbook | View Letters >
• February 11 | ADEQ & the Arizona AgBMP Committee Request a Comment Period Extension for the EPA's Proposed  “Air Plan Revisions; Arizona” | View Letters >
• January 3 | ADEQ Comments on the EPA's Proposed Deadline Extension for the Regional Haze Third Planning Period | View Letter >

Past Years Comments and Testimony | View >