
Colorado’s Air Quality Control Commission (AQCC) on Sept. 18 unanimously approved final steps to adopt the Environmental Protection Agency’s (EPA) 2024 methane standards for existing oil and gas operations, even as the Trump administration moves to reconsider the Biden-era rules.
With the approval, Colorado became the first state to fully adopt the existing-source methane standards under the 2024 rule. The Colorado Department of Public Health and Environment’s Air Pollution Control Division (APCD) developed the regulatory proposals, while the AQCC, an independent regulatory commission within CDPHE, adopted them.
The process began in February 2025 with requirements to phase out natural-gas-emitting pneumatic controllers and other equipment. In February 2026, the AQCC added requirements for instrument-based leak detection and repair at oil and gas well sites, including low-production sites. The latest action finalizes requirements for closed-vent systems, covers, and enclosed combustion devices.
Colorado’s new rules go beyond EPA’s baseline in some areas, including by extending closed-vent-system and cover requirements to all storage tanks covered by the state’s regulations. Its continuous-monitoring requirements for certain enclosed combustion devices also apply more broadly than EPA’s requirements.
Federal methane regulations remain in flux. In March 2025, EPA said it would reconsider its 2024 oil and gas rules and has since finalized technical revisions to some provisions while developing additional amendments. Colorado’s state requirements can continue to apply to oil and gas operations in the state even if EPA weakens or changes the federal standards.




















