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Underground Storage Tank Updates


The Arizona Department of Environmental Quality (ADEQ) has made final amendments to state underground storage tank (UST) rules. The amendments incorporate new federal regulations and implement a UST plan review process for inspection and approval of newly installed, modified, and permanently closed tanks previously conducted by the State Fire Marshal. The final rule adopts changes to federal regulations that were in effect as of Oct. 13, 2015. Technical corrections have also been made to existing Articles 3, 4, 5, and 8. The amendments are effective, as of Jan. 1, 2020.


  • Former Arizona UST Rule | View >
  • 2015 Federal UST Rule Revision | View >
  • First Draft Proposed Rule for Public Discussion | View >
  • Second Draft Proposed Rule for Public Discussion | View >
  • Notice of Proposed Rulemaking | View > 
  • Notice of Final Rulemaking (effective January 1, 2020) | View >
  • UST Rule Updates Summary | View >