The U.S. Environmental Protection Agency announced its proposed approval of Colorado’s request to administer permitting for Class VI underground injection wells under the Safe Drinking Water Act. The proposal, released on April 23, supports EPA’s Powering the Great American Comeback initiative, which prioritizes clean and safe water, energy dominance, and cooperative federalism.
EPA Regional Administrator Cyrus Western said, "Congress laid out a clear vision under the Safe Drinking Water Act for delegating decision-making from EPA to the states. This primacy proposal supports Congress’ vision and recognizes that Colorado has the local expertise to protect its groundwater resources while supporting economic growth."
The agency said it had conducted a comprehensive technical and legal review of Colorado’s proposed program. EPA is seeking public comment on whether the state’s program meets all requirements for approval and will be implemented consistent with federal law. Public comments will be accepted through May 4, 2026.
According to the announcement, six states have already received primacy for Class VI wells, including North Dakota and Wyoming in EPA Region 8. The EPA is committed to expediting reviews of underground injection control permits and primacy applications.
A virtual public hearing on the proposal is scheduled for April 23, 2026, from 5-8 p.m. Mountain Standard Time. Registration details are available online or by email at UICprimacy@epa.gov. More information about UIC primacy can be found as listed on the agency's official roster page.
