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  2. Underground Injection Control (UIC)

Class VI Guidance Documents

EPA is continuing to develop guidance documents to support the Class VI regulations. Class VI Guidance documents are prepared to provide:

  • Program implementation assistance for UIC directors
  • Compliance assistance for owners and operators of Class VI wells. 

Guidance documents available for viewing and downloading include:

  • Final Class VI guidance documents
  • Draft Class VI guidance documents (open for public comment)
  • Quick reference guides on Class VI program implementation considerations

Guidance document pages are periodically updated. Please check back for updates.

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 April 30, 2025
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