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  2. Underground Injection Control (UIC)

Public Hearing: Proposed Rulemaking for Arizona Underground Injection Control Primacy Program

Date and Time

Wednesday, June 25, 2025
5:00 pm - 8:00 pm MST
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Event Host

U.S. Environmental Protection Agency (EPA)

Event Type

Public Meeting

Description

Additional Public Comment

In addition to the virtual public hearing, EPA recommends submitting the text of your oral comments as written comments to the rulemaking docket identified by Docket ID No. EPA-HQ-OW-2025-0087 at www.regulations.gov. Alternatively, you can submit your oral testimony to UICprimacy@epa.gov.

As a result of EPA’s comprehensive review of the state’s application, the Agency is proposing to approve Arizona’s primacy application because EPA has determined that the application meets all applicable requirements for primacy approval under Safe Drinking Water Act (SDWA) section 1422 and because the State has demonstrated that it is prepared to implement a Underground Injection Control (UIC) program in a manner consistent with the terms and purposes of SDWA and all applicable UIC regulations. Upon approval, EPA would oversee Arizona’s administration of its UIC program.

On this page:
  • Registration
  • Details
  • Agenda
  • Updates
  • Access to the Hearing

Registration

To register to speak at the virtual hearing, please use the online registration form or contact the public hearing team by email at UICprimacy@epa.gov. You do not need to pre-register to speak at the virtual public hearing, but it is recommended.

If you require the services of an interpreter or special accommodations such as audio description, please pre-register for the hearing and describe your needs by June 18, 2025. EPA may not be able to arrange accommodations without advance notice.

Details

EPA will hold a public hearing to obtain public input on EPA’s intent to approve Arizona’s request to have primary enforcement responsibility (primacy) for the UIC program under the SDWA section 1422. EPA’s approval would allow the Arizona Department of Environmental Quality to authorize certain underground injection wells regulated under the federal SDWA and ensure compliance with UIC program requirements.

Each commenter will have three minutes to provide oral testimony.

EPA will make every effort to accommodate all speakers who register, although preferences on speaking times may not be able to be fulfilled. EPA may ask clarifying questions during the oral presentations but will not respond to the presentations at that time. Written statements and supporting information submitted during the comment period will be considered with the same weight as oral comments and supporting information presented at the public hearing.

EPA will follow the schedule as closely as possible on the day of the hearing; however, please plan for the hearing to run either ahead of schedule or behind schedule.

Agenda

On June 24, 2025, EPA will post on this page a general agenda for the hearing that will list pre-registered speakers in approximate order.

  • Agenda – TBD

Updates

Updates on the virtual hearing logistics will be posted on this page. Contact the public hearing team by email at UICprimacy@epa.gov if you have any questions about the virtual public hearing.

Access to the Hearing

The virtual public hearing link will be available on this page 5 minutes before the start of the hearing.

Links

  • REGISTER NOW (Zoom for Government)
  • Rulemaking Docket No. EPA-HQ-OW-2025-0087
  • More About Arizona's UIC Primacy Program
  • Arizona's UIC Program Primacy Application Website

Underground Injection Control (UIC)

  • Class I Industrial and Municipal Waste Disposal Wells
  • Class II Oil and Gas Related Injection Wells
  • Class III Injection Wells for Solution Mining
  • Class IV Shallow Hazardous and Radioactive Injection Wells
  • Class V Wells for Injection of Non-Hazardous Fluids into or Above Underground Sources of Drinking Water
  • Class VI Wells Used for Geologic Sequestration of CO2
Contact Us About Underground Injection Control
Contact Us to ask a question, provide feedback, or report a problem.
Last updated on May 19, 2025
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