Data / Federal rules / 2025-08513

Arizona Underground Injection Control (UIC) Program; Class I-VI Primacy

The Environmental Protection Agency published this proposed rule in the Federal Register on May 19, 2025. Comments closed on July 3, 2025.

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What the agency says

The U.S. Environmental Protection Agency (EPA or Agency) has received a complete Underground Injection Control (UIC) primacy application from the State of Arizona requesting primary enforcement responsibility (primacy) for Class I-VI injection wells under the Safe Drinking Water Act (SDWA) section 1422. The EPA's approval of the State's UIC program primacy application would allow the Arizona Department of Environmental Quality (ADEQ) to authorize underground injection for all underground injection wells regulated under the Federal SDWA and ensure compliance with UIC program requirements. The EPA proposes to issue a final rule approving Arizona's application to implement the UIC program for Class I-VI injection wells located within the State, except those on Indian lands. The EPA proposes amendments to reflect this proposed approval of Arizona's UIC program primacy application.

Key facts

Document number: 2025-08513
Type: Proposed rule
Action: Proposed rule
Agency: Environmental Protection Agency
Published: May 19, 2025
Comments due: July 3, 2025
Dates: Comments must be received on or before July 3, 2025. Public hearing: The EPA will hold one virtual public hearing during the comment period. Please refer to the SUPPLEMENTARY INFORMATION section for additional information on the public hearing.
Docket: EPA-HQ-OW-2025-0087; FRL 11786-01-OW
Code of Federal Regulations: 40 CFR 147
Topics: Environmental protection; Incorporation by reference; Indians-lands; Intergovernmental relations; Reporting and recordkeeping requirements; Water supply
Pages: 6

The document on federalregister.gov PDF

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Everything from the Environmental Protection Agency · Rules on environmental protection · Rules on incorporation by reference · Rules on indians-lands · Published in May 2025

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