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Underground Injection Wells
National Summary
The Safe Drinking Water Act (SDWA) protects all sources of drinking water, including underground sources (aquifers). Under the SDWA, the underground injection control (UIC) program regulates any injection of waste into the subsurface. The U.S. Environmental Protection Agency (EPA) groups underground injection wells into six classes for regulatory control purposes.
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TypeTitleDateState
Proposed Regulations 40 CFR 147 - Request for Comments on Michigan Underground Injection Control Class II Program Application 04/15/2020National
Proposed Regulations 40 CFR 147 - State of Louisiana Underground Injection Control Program; Class VI Program Revision Application; Notice of Availability of New Information 08/16/2023National
Final Regulations 40 CFR 147 - State of Michigan Underground Injection Control (UIC) Class II Program; Primacy Approval 03/19/2021National
Proposed Regulations 40 CFR 147 - State of Michigan Underground Injection Control (UIC) Class II Program; Primacy Approval 03/19/2021National
Final Regulations 40 CFR 147 - State of Michigan Underground Injection Control (UIC) Class II Program; Primacy Approval 06/17/2021National
Final Regulations 40 CFR 147 - State of Michigan Underground Injection Control (UIC) Class II Program; Primacy Approval 07/28/2022National
Proposed Regulations 40 CFR 147 - State of New Mexico Underground Injection Control Program; Primacy Revisions 10/13/2020National
Final Regulations 40 CFR 147 - State of North Dakota Underground Injection Control Program; Class I, III, IV, and V Primacy Revisions 04/15/2019National
Notices 40 CFR 147 - Underground Injection Control (UIC) Program Revision; Washington 03/08/2013National
Proposed Regulations 40 CFR 147 - Wyoming Underground Injection Control Program; Class VI Primacy 04/14/2020National
Final Regulations 40 CFR 147 - Wyoming Underground Injection Control Program; Class VI Primacy 10/09/2020National
Final Regulations 40 CFR 47 - State of New Mexico Underground Injection Control Program; Primacy Revisions 01/03/2022National
Proposed Regulations 40 CFR Part 147 - State of Louisiana Underground Injection Control Program; Class VI Program Revision Application 05/04/2023National
Notices Hazardous Waste Injection Restrictions; Petition for Exemption-Blanchard Refining Company LLC 07/17/2013National
Notices Hydraulic Fracturing Research Related to Drinking Water Resources 11/09/2012National
Notices North Dakota Underground Injection Control Program Revision 08/09/2013National
Guidance Documents Protecting Underground Sources of Drinking Water from Underground Injection  National
Notices Science Advisory Board Staff Office Request for Nominations of Experts for the SAB Hydraulic Fracturing Advisory Panel 08/21/2012National
Forms Underground Injection Control Forms  National
Notices Underground Injection Control Program; Hazardous Waste Injection Restrictions; Petition for Exemption--Class I Hazardous Waste Injection; BASF Corporation Freeport, Texas 04/18/2013National
Notices Underground Injection Control Program; Hazardous Waste Injection Restrictions; Petition for Exemption--Class I Hazardous Waste Injection; Cornerstone Chemical Company, Waggaman, LA 08/30/2012National
Notices Underground Injection Control Program; Hazardous Waste Injection Restrictions; Petition for Exemption--Class I Hazardous Waste Injection; Mosaic Fertilizer, LLC Uncle Sam, LA 12/17/2013National
Regulatory Analysis Underground Injection Wells  National
Questions & Answers What are the requirements for meeting Class II Water Injection Well Standards under the Clean Water Act? 10/14/2005National