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  2. Underground Injection Control (UIC)

Comprehensive UIC Program Evaluations

EPA has developed a framework for conducting a comprehensive program evaluation (CPE) for any state, tribe, or territory authorized to enforce and implement a UIC program (commonly referred to as a primacy program).  The CPE framework, outlined in the document attached below, will improve EPA’s ability carry out its oversight role. It will increase consistency across the Agency and will provide increased transparency for those primacy programs under review. It will also serve as a resource for anyone trying to understand how the Agency conducts UIC program oversight.

While the CPE framework is intended as a general guide for regions conducting comprehensive program evaluations, regions have the flexibility to add review elements or additional questions, or request additional information from any given primacy program based on circumstances or issues specific to that primacy program or region.

The CPE framework is applicable to primacy programs approved under both SDWA 1422 and 1425 and covers Well Classes I, II, III, V, and VI. 

  • Comprehensive UIC Program Evaluations (docx) (35.52 KB, March, 2022)
    Comprehensive program evaluation framework for EPA oversight of UIC primacy programs.

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 February 10, 2025
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