ADEQ's Leaking Underground Storage Tank program investigates and coordinates efforts to clean up leaking USTs once a release has occurred. These efforts may include overseeing cleanups performed by the leaking UST owner, operator or by a volunteer who is willing to assume responsibility. ADEQ also may perform corrective actions itself using consultants who are on state contract.

• When a UST Release Occurs
• Forms and Guidance
• Bulletins
• Contacts

UST owners and operators are required to notify ADEQ within 24 hours of a release or suspected release of an underground storage tank. Call (602) 771-4303 or 4255 to make a report, or phone (602) 771-4289 to speak with a UST program representative. You may also call ADEQ toll free at (800) 234-5677.

Leaking UST Statistics

• Number of Releases Reported - 8,022
• Number of Releases Closed - 5,728