# Colorado Underground Injection Control (UIC) Program; Class VI Primacy

**Action Urgency Score:** 65/100

| Field | Value |
|---|---|
| Agency | Environmental Protection Agency |
| Type | Final rule |
| Action | Final rule. |
| Published | 2026-10-13 |
| Effective | 2026-11-12 |
| Significant | No |
| CFR parts | 40 CFR 147 |
| Summary | The U.S. Environmental Protection Agency (EPA or the Agency) is approving an application from the State of Colorado that requests primary enforcement responsibility (primacy) for Class VI injection wells under Safe Drinking Water Act (SDWA) section 1422. The EPA's approval of the State's UIC program primacy application will allow the Colorado Energy and Carbon Management Commission (ECMC) to issue and enforce UIC Class VI permits for geologic carbon sequestration. The EPA will remain the permitting authority for Class VI injection wells on Indian lands within the State. With this action, the E |
| Document number | 2026-20846 |

## Why this score
- Effective date within 30 days.
- Final rule.

Source: Federal Register API (Office of the Federal Register) (https://www.federalregister.gov/documents/2026/10/13/2026-20846/colorado-underground-injection-control-uic-program-class-vi-primacy). Last refreshed: 2026-11-04T21:40:49.974Z.
Data from the Federal Register API; the published Federal Register document is authoritative. Informational only, not legal advice.