The Nickel Report

Last month saw several developments in the U.S. Environmental Protection Agency’s (EPA) ongoing efforts to authorize states to implement Class VI of the federal Underground Injection Control (UIC) program under the Safe Drinking Water Act (SDWA) for geologic sequestration of carbon. This push toward state primacy is an important development for the rapidly growing carbon capture and sequestration (CCS) industry, for which Class VI permits are the critical construction and operating permit. Currently, there are 62 CCS projects - including many with multiple wells - with permit applications pending with EPA. Project proponents anticipate that permitting will be faster if administered by the state instead of EPA. The latest developments last month include: (1) EPA’s proposal to grant primacy to Arizona; (2) EPA’s proposal to grant primacy to Texas; (3) a federal court decision rejecting a challenge to EPA’s earlier grant of primacy to Louisiana; and (4) an ongoing challenge to West Virginia’s recently granted primacy.

On June 9, 2025, the US EPA took another step forward toward having states take the lead for implementing and enforcing Class VI Underground Injection Control (UIC) programs under the Safe Drinking Water Act (SDWA), which are central to carbon capture and sequestration (CCS) permitting. To date, EPA has signed Memoranda of Agreement (MOAs) with several states regarding state agreements to implement Class VI injection well programs. The Texas MOA was signed on April 29, 2025. Now, and consistent with the MOA, EPA has released its proposed rule to give Texas primacy over the program. 

On January 5, 2024, EPA approved Louisiana’s application to administer the Class VI underground injection control program (UIC). 89 Fed. Reg. 703. Class VI wells are used to inject carbon dioxide into deep geological formations for long-term underground storage. This technology is a promising tool for reducing carbon dioxide emissions to the atmosphere.

EPA’s grant of “primacy” to Louisiana for the Class VI program will allow the state’s Department of Natural Resources to issue UIC permits for Class VI wells, and to ensure compliance with the program. Louisiana submitted its application for Class VI primacy on September 17, 2021. It becomes the third state with primacy over Class VI wells, joining North Dakota (granted primacy in 2018) and Wyoming (2020). Louisiana is the first state to receive primacy over Class VI wells during the Biden administration. Several other states—including Texas, West Virginia, and Arizona, according to the EPA’s website—currently are seeking primacy.

Many involved in carbon capture utilization and storage (CCUS) policy foresaw several years ago the situation we are in now:  lots of Class VI Underground Injection Control (UIC) permit applications to store CO₂, not enough speed at the US Environmental Protection Agency (EPA) to get them processed, and not enough speed by EPA to divvy up the work by delegating the permitting authority to the States. 

That’s why Congress included funding in the Bipartisan Infrastructure Law for Class VI UIC permitting:  $50 million for EPA to help States defray costs of taking over the Class VI permitting program and $25 million total for fiscal years 2022-26 for EPA itself to get the job done.