Governing Law and Regulations
Arizona Department of Environmental Quality (ADEQ) Water Quality Division
U.S. Environmental Protection Agency (EPA) Region 9
See ADDRESSES & CONTACTS for addresses and telephone numbers.
See national section for basic information and federal regulations.
Comparison: State vs. Federal
• Rules. Arizona has adopted the federal pretreatment standards by reference. See the national section PRETREATMENT STANDARDS for more information.
Arizona is authorized by the U.S. Environmental Protection Agency (EPA) to administer the federal National Pollutant Discharge Elimination System (NPDES) permit program, known as the Arizona Pollutant Discharge Elimination System (AZPDES) permit program in the state. For more information about the AZPDES permit program, see the state section NPDES PERMIT.
• Administration and enforcement. ADEQ's Water Quality Division provides federal NPDES permit applications and ensures permitted activities comply with state water quality standards, including pretreatment requirements.
AZ Admin. Code R 18-9-A906
The state requires that industrial users provide appropriate pretreatment technology including control equipment, such as equalization tanks or facilities, for protection against surges or slug loading that might interfere with or otherwise be incompatible with a publicly owned treatment works ...