Environmental Protection Agency · EPA-HQ-OW-2025-2829
Colorado Underground Injection Control (UIC) Program; Class VI Primacy
The Federal Register published the matched proposal on March 19, 2026 and the matched final rule on October 13, 2026, 208 days later.
Official publication history
Proposal ·
Colorado Underground Injection Control Program; Class VI Primacy
Comment date listed May 4, 2026
Final rule ·
Colorado Underground Injection Control (UIC) Program; Class VI Primacy
Effective date in register data November 12, 2026
About this timeline
How the records were matched
America.co links a proposed rule and a later final rule when the Federal Register records share the exact docket identifier and lead agency. This snapshot covers records published from January 1, 2025 to November 10, 2026.
A docket can hold more than one regulatory action. Dates here are dates listed in individual notices. Later corrections, court actions, other dockets and records outside the date window may change what applies. Follow the official documents for the full text and effective dates.
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