Federal Safety Push Reshapes the Future of CO₂ Pipelines

New federal rules aim to make carbon pipelines safer, fueling trust, investment, and the rapid rise of carbon capture infrastructure

24 Jan 2025

The U.S. government is moving to toughen safety rules for carbon dioxide pipelines at a moment when carbon capture is shifting from niche idea to national buildout.

The Pipeline and Hazardous Materials Safety Administration, known as PHMSA, has proposed stricter standards for how CO₂ pipelines are designed, built, and monitored. The timing is deliberate. Dozens of large carbon capture and storage projects are moving from the drawing board toward construction, many of them spanning multiple states.

The push follows a sobering lesson. In 2020, a CO₂ pipeline rupture in Mississippi triggered a mass evacuation and exposed major gaps in emergency planning and leak detection. Regulators say the incident underscored the need for clearer rules as the network expands.

Under the proposal, pipeline operators would be required to use more advanced leak detection systems, tighten construction requirements, and coordinate closely with local emergency responders. Planning would have to account for how CO₂ behaves when released, including how it can displace oxygen and pose risks to nearby communities.

For developers, the rules bring both friction and relief. Projects already deep in planning may face delays or higher costs as designs are updated. At the same time, many companies see clearer standards as a way to reduce uncertainty.

“Trust is built with transparency,” said a senior industry executive. “Clear rules help us design better systems and earn public confidence.”

That confidence matters. Carbon capture has drawn strong policy backing and climate incentives, but public skepticism remains high, especially in rural areas where pipelines are proposed. Stronger safety oversight could ease permitting battles and reduce the legal risks that have slowed past projects, including a high profile multistate pipeline that was shelved in 2023.

Industry groups are urging regulators to phase in the changes to avoid stalling momentum. Even so, there is broad agreement that the sector needs guardrails if it is going to grow.

As the U.S. seeks a leadership role in carbon capture, PHMSA’s proposal marks a shift in tone. The message is no longer ‘build fast and fix later’, it is ‘build carefully, or not at all.’