ADEQ is the implementing agency for ensuring compliance with underground storage tank (UST) regulations established by the United States Environmental Protection Agency (EPA) and with Arizona-specific program requirements. The purpose of the UST Program is to protect public health and the environment from UST releases (i.e., spills, leaks, emissions, etc.) of petroleum and other regulated hazardous substances into groundwater, surface water or soils | Learn More >

UST Operations

UST owners and operators with regulated UST systems must ensure that they are operating in compliance with applicable requirements including: financial responsibility; UST system maintenance, testing, and repair; reporting suspected releases; and operator training | Learn More >

Leak Prevention (Noncorrective Action)

Leak prevention activities, also known as noncorrective actions, are proactive measures designed to prevent future releases. These include UST system replacements, UST system removals, baseline assessments, and sampling to investigate a suspected release | Learn More >

Cleanup (Corrective Action)

The work necessary to investigate, analyze, and conduct cleanup activities for releases from UST systems are called corrective actions. UST owners and operators are required to conduct corrective actions in accordance with regulatory requirements and timeframes. Failure to address corrective action requirements in a timely manner may result in costly enforcement actions and may lead to soil and groundwater contamination, potential third-party liability, and devaluation of the subject property and potentially adjacent properties | Learn More >

Guidance Documents & Other Resources

ADEQ has developed guidance documents to provide UST related information and assistance | View >

Testimonials

ADEQ has helped owners, operators and property owners throughout the state prevent leaks and manage cleanups. Read what is being said about ADEQ's UST programs | View Testimonials >