Trump withdraws new pipeline rules inspired by CO2 leaks in Mississippi, Louisiana

by Tristan Baurick, Verite, Louisiana Illuminator
March 8, 2025

Nearly five years after a pipeline spewed poison gas across a Mississippi town, federal regulators appeared ready in recent weeks to institute new safety rules aimed at preventing similar accidents across the U.S.’s fast-growing network of carbon dioxide (CO2) pipelines.

But the proposed rules, unveiled five days before the end of Joe Biden’s presidency, were quietly derailed during the first weeks of President Donald Trump’s second term.

A federal pipeline safety official not authorized to speak publicly said the proposed rules were “withdrawn” in accordance with a Jan. 20 executive order that freezes all pending regulations and initiates a review process by Trump’s newly appointed agency leaders. Putting the pipeline rules in further doubt is a Feb. 19 executive order aimed at rooting out all regulations that are costly to “private parties” and impede economic development.

Trump’s choice to lead the Pipeline and Hazardous Materials Safety Administration, which proposed the rules, is Paul Roberti, an attorney strongly backed by pipeline and energy industry groups. Roberti, who is awaiting U.S. Senate confirmation, oversaw PHMSA’s safety enforcement during Trump’s first term, a time marked by fewer citations and smaller fines than the Obama and Biden administrations.

Pipeline safety advocates still hope to push the Trump administration to approve the rules, which they say are critically important for reducing the risks of potentially deadly accidents across a growing number of states.

“It’s not dead yet,” said Paul Blackburn, an energy policy advisor for the Bold Alliance, an environmental group that tracks pipeline development. “It can be brought back by Trump, and I think the Trump administration should be pressured to do that.”

The more than 5,000 miles of CO2 pipelines in the U.S. are primarily used for enhanced oil recovery, a process that injects carbon dioxide into old oil reserves to squeeze out leftover deposits. Much of the current and predicted growth of the CO2 pipeline network is linked to the recent boom in carbon capture technologies, which allow industrial plants to store CO2 underground instead of releasing it into the air.

The CO2 pipeline network could top 66,000 miles – a thirteenfold increase – by 2050, according to a Princeton University-led study.

The Trump administration isn’t as supportive of carbon capture, but industry experts say growth will continue as companies try to meet state-level climate benchmarks.

While proponents say carbon capture will help address climate change, transporting pressurized CO2 comes with dangers, especially for rural stretches of the Midwest and Gulf Coast, where the network is concentrated.

CO2 can cause drowsiness, suffocation and sometimes death. Colorless, odorless, and heavier than air, carbon dioxide can travel undetected and at lethal concentrations over large distances.

The proposed rules would establish the first design, installation and maintenance requirements for CO2 pipelines. Companies operating pipelines would need to provide training to local police and fire departments on how to respond to CO2 leaks, and emergency communication with the public would need to be improved.

Operators would be required to plan for gas releases that could harm people within two miles of a pipeline. The proposed rules show that PHMSA finally recognizes that the threats from CO2 pipelines are different from oil and natural gas pipelines, which can spill, burn or explode, but don’t usually imperil people miles away, said Bill Caram, executive director of the Pipeline Safety Trust, a nonprofit watchdog group.

“These are relatively strong proposals,” he said. “Would these rules make CO2 pipelines completely safe? No. But it would modernize the pipelines.”

PHMSA currently has no specific standards for transporting CO2. Rules governing the CO2 pipeline network haven’t undergone significant review since 1991, according to the trust.

The proposed rules apply “lessons learned” from a 2020 pipeline rupture in Sataria, Miss., PHMSA officials said in an announcement on Jan. 15.

The rupture in the small community 30 miles northwest of Jackson forced about 200 Satartia residents to evacuate. Emergency responders found people passed out, disoriented and struggling to breathe. At least 45 people were treated at nearby hospitals.

“I have learned first-hand from affected communities in Mississippi and across America why we need stronger CO2 pipeline safety standards,” then-PHMSA Deputy Administrator Tristan Brown, a Biden appointee, said in a statement on Jan. 15. “These new requirements will be the strongest, most comprehensive standards for carbon dioxide transportation in the world and will set our nation on a safer path as we continue to address climate challenges.”

Accidental releases have occurred from CO2 pipelines 76 times since 2010, according to PHMSA data reviewed by Verite News. Of the more than 67,000 barrels of CO2 released over the past 15 years, the vast majority – about 54,000 barrels – came from pipelines owned by ExxonMobil subsidiary Denbury Inc.

Denbury operates the 925-mile pipeline network that failed in Satartia and more recently in southwest Louisiana. In April, a pipeline at a Denbury pump station near the Calcasieu Parish town of Sulphur ruptured, triggering road closures and a shelter-in-place advisory. Some residents reported feeling tired and light-headed, but local authorities reported no serious illnesses.

The pump station and pipeline weren’t equipped with alarms or other methods of alerting nearby residents when accidents occur.

Several Sulphur-area residents said they received no notice of the leak or became aware of it via Facebook posts more than an hour after the gas began to spread.

“There should have been alarms, and the whole community should have been notified,” Roishetta Ozane, a community organizer who lives near the station, told Verite in April. “I don’t trust the system we have at all.”

Unless the proposed rules are enacted, similar or worse accidents are likely, said Kenneth Clarkson, the trust’s communications director.

“In the absence of a rule, blatant regulatory shortfalls will remain, leaving the public fully exposed to the risks of CO2 pipelines,” he said.

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