EPA - Colorado Class VI UIC Program Application Letter

This document is a letter from the Colorado Governor to the EPA concerning the state's application to administer its own Class VI Underground Injection Control (UIC) program. The letter indicates Colorado's intent to seek primacy for regulating carbon dioxide injection wells under the Safe Drinking Water Act. The EPA has made this letter available on Regulations.gov for public access and review.

While this document itself does not impose new obligations or deadlines, it signifies a step in the process for Colorado to gain primary enforcement authority for Class VI wells. Regulated entities operating or planning to operate in Colorado should be aware of this development as it may affect future permitting and compliance activities. Further information regarding the EPA's review process and any public comment periods will be announced separately.