The Port Neches explosion was a preventable chemical disaster that struck the TPC Group butadiene plant in Port Neches, Texas, at roughly 1 a.m. on November 27, 2019, forcing a four-mile mandatory evacuation, burning for more than a month, and ending with the company’s 2024 guilty plea to a federal Clean Air Act felony. Years later, the criminal case is still unresolved, a bankruptcy trust is paying residents a fraction of their losses, and some lawsuits against non-bankrupt parties are still moving.
What Happened That Night
A 16-inch pipe in the facility’s butadiene finishing unit ruptured, and about 6,000 gallons — roughly 30,000 pounds — of liquid butadiene vaporized and ignited. The first blast came two minutes after the rupture. A second explosion hit a little more than an hour later. A third, more violent explosion at around 2 p.m. that afternoon launched a process tower into the air and collapsed others in the unit.1Texas Tribune. Texas Chemical Plant Explosion TPC Port Neches
Four TPC employees and one contractor were injured, with concussions, burns, perforated eardrums, tinnitus, and cracked teeth among the reported injuries.2EPA. Texas Petrochemical Company Pleads Guilty to Clean Air Act Violation A 53-year-old man in nearby Groves, Trent Fontenot, suffered a fatal heart attack his family’s attorneys attributed to the shock of the blast, though whether his death was officially counted as a fatality is unclear.3KFDM. Lawyer Says Port Neches Man Died From Heart Attack as Result of TPC Explosions
Jefferson County declared a state of disaster and ordered a mandatory evacuation within four miles, covering residents in Port Neches, Groves, Nederland, and part of Port Arthur. Repeated shelter-in-place orders followed as butadiene and benzene concentrations climbed.4U.S. Department of Justice. TPC Group LLC Investigation – Port Neches Explosion Smoke stretched 45 miles, schools closed for days, and residents were warned to watch for asbestos deposited in their yards.5Sierra Club. TPC Chemical Plant Explosion Dumps Toxics on Community More than 11 million pounds of extremely hazardous substances, mostly butadiene, were released. On-site damage reached roughly $450 million, with another $153 million in off-site damage to nearby homes and businesses.
Why It Exploded
The U.S. Chemical Safety and Hazard Investigation Board (CSB) traced the rupture to “popcorn polymer,” a hard porous material that forms when butadiene reacts with oxygen and grows exponentially, generating enough internal pressure to burst steel pipe.6CSB. TPC Factual Update
The polymer built up in a “dead leg” — piping attached to a pump that had been taken out of service. The CSB ultimately found the dead leg was 35 feet long and 16 inches in diameter, and the pump had been offline for 114 days, letting butadiene sit stagnant the entire time. This was a known risk at the plant. A 2016 Process Hazard Analysis had recommended flushing piping tied to out-of-service equipment every month to prevent exactly this problem. The recommendation was never implemented.7Regulations.gov. CSB TPC Group Report There was also no remotely operated isolation valve upstream of the rupture, so once the pipe gave way, workers had no way to shut off the butadiene flow.6CSB. TPC Factual Update
A Pattern of Violations Before the Blast
TPC Group had accumulated more than $275,000 in environmental penalties at Port Neches in the decade before the explosion. The EPA had classified the facility as having “high-priority violations” and being noncompliant with the federal Clean Air Act every quarter since January 2017.8KHOU. Port Neches TPC Plant Violations Since 2010
Between 2014 and 2018, the Texas Commission on Environmental Quality entered seven administrative orders against TPC Group for air emissions and related violations.9TCEQ. State of Texas Original Petition Against TPC Group State fines included $20,206 in 2010 after corrosion on a butadiene transfer line caused unauthorized emissions, $45,750 in 2015 for a year of excessive emissions, and $7,125 in 2016 after 900 pounds of chlorine gas were released. The EPA added $30,750 in 2016 for the chlorine incident, citing TPC’s failure to maintain a safe facility, and over $72,000 in 2017 for repeated Clean Air Act violations tied to flaring.8KHOU. Port Neches TPC Plant Violations Since 2010
In the months before the blast, Houston Public Media reported, fugitive butadiene emissions climbed sharply. In September 2019, two months before the explosion, a valve connection failed and butadiene readings hit 14,846 parts per billion, far above the 25 parts-per-billion notification threshold set under a 2017 EPA consent agreement.10Houston Public Media. Ahead of Explosion, Port Neches Plant Reported an Increase of Rogue Emissions of Explosive Gas
The Federal Criminal Case
On May 21, 2024, TPC Group pleaded guilty to a one-count felony information charging a Clean Air Act violation. The company admitted knowingly failing to implement its own written operating procedures, including the monthly line flushes that would have prevented the polymer buildup.11EPA. TPC Group LLC Settlement Information Sheet
The proposed plea agreement called for $18 million in criminal fines, $12.1 million in civil penalties paid through bankruptcy, roughly $80 million in injunctive relief to overhaul safety programs at both the Port Neches and Houston facilities, a one-year probation term, and a public apology.12U.S. Department of Justice. United States v. TPC Group LLC The required safety work included revamped process hazard analyses, updated procedures and training, audits of emergency shutdown procedures, publicly accessible fenceline and community air monitoring, and a review of inherently safer technology.2EPA. Texas Petrochemical Company Pleads Guilty to Clean Air Act Violation The same investigation uncovered over 2,000 Risk Management Program violations at TPC’s Houston facility, less than a mile from homes, with “similar conditions” to those that caused the Port Neches blast.13EPA. EPA Announces Agreement With TPC Group LLC to Correct Alleged Clean Air Act Violations
The plea did not hold. In October 2024, crime victims intervened under the Crime Victims’ Rights Act and moved to reject the agreement.14CourtListener. United States v. TPC Group LLC Docket On January 10, 2025, Federal Judge Michael Truncale ordered $292 million in restitution added to the deal. TPC Group rejected the amended agreement, pushing the Department of Justice toward a grand jury indictment and trial.15BCA Clients. TPC Bankruptcy Trust Information The criminal case remained active in the Eastern District of Texas as of May 2026.
OSHA and State Enforcement
OSHA opened its investigation the day of the explosion and issued 12 citations in May 2020, with $514,692 in proposed penalties. Three were classified as willful violations, carrying $404,811 in fines, for failing to develop emergency shutdown procedures and failing to inspect and test piping components. TPC contested all 12, and the OSHA case was still listed as open as of June 2026.16OSHA. OSHA Inspection Detail – TPC Group LLC17U.S. Department of Labor. OSHA News Release
The State of Texas, through the Attorney General on behalf of the TCEQ, filed a civil enforcement action (Case No. D-1-GN-20-001042) in Travis County District Court alleging violations of the Texas Clean Air Act, the Federal Clean Air Act, and the Texas Water Code. The petition said that between November 27 and December 16, 2019, firefighting runoff bypassed the plant’s wastewater treatment system and reached Star Lake Canal and the Neches River Tidal, killing 2,196 fish and 51 crabs.9TCEQ. State of Texas Original Petition Against TPC Group
What Victims Can Recover
Nearly 10,000 plaintiffs — residents, property owners, and businesses — filed claims against TPC Group. The Texas Multidistrict Litigation Panel consolidated those cases into the 128th District Court in Orange County.15BCA Clients. TPC Bankruptcy Trust Information
On June 1, 2022, TPC Group filed for Chapter 11 bankruptcy in Delaware, citing more than $1.3 billion in secured funded debt and over 11,000 asserted litigation claims from the explosion.18Morris Nichols. Morris Nichols Client TPC Secures Chapter 11 Plan Confirmation The court confirmed the Plan of Reorganization on December 1, 2022, and TPC emerged from bankruptcy on December 16, 2022, with over $950 million in debt eliminated and control passing to prepetition senior secured noteholders.19TPC Group. TPC Group Successfully Completes Financial Restructuring
For individual victims, the plan created the TPC GUC Trust, funded with $30 million and overseen by trustee Ed Gentle. Established on November 16, 2022, and funded a month later, the trust estimated roughly 8,000 individual claims and 3,500 residential property claims. Recovery through the trust was described as “pennies on the dollar” against total damages estimated at over $1 billion.15BCA Clients. TPC Bankruptcy Trust Information
The bankruptcy stayed suits against TPC Group itself, but litigation against other parties has continued. Plaintiffs have pursued non-bankrupt defendants, including the chemical supplier Nalco and an engineering firm. The Texas Supreme Court also allowed claims to proceed against TPC’s ownership and investment groups. In February 2023, the Delaware bankruptcy court ruled that “veil-piercing” claims against TPC’s equity sponsors were barred by the plan’s injunction, but “negligent undertaking” claims could go forward as direct claims if properly pleaded.20U.S. Bankruptcy Court for the District of Delaware. TPC Group Bankruptcy Opinion
What Changed After
The Port Neches explosion, combined with the March 2019 Intercontinental Terminals Company fire in Deer Park, pushed the Texas Legislature to act. In June 2021, Governor Greg Abbott signed Senate Bill 900, by state Senator Carol Alvarado, creating safety, design, construction, and maintenance standards for large aboveground storage tanks at petrochemical plants, refineries, and bulk storage terminals. Before SB 900, Texas regulated below-ground chemical storage tanks but had no comparable rules for aboveground tanks. The TCEQ was directed to issue the new rules by September 2023.21United Steelworkers. New Texas Law Regulates Aboveground Chemical Storage Tanks
The CSB issued five formal recommendations directed at TPC Group and the American Chemistry Council, covering dead-leg identification and elimination, passivation of butadiene equipment, electronic safety recordkeeping, and revised industry guidance on popcorn polymer hazards. All five have since been closed.22CSB. TPC Port Neches Explosions and Fire
The butadiene processing unit at Port Neches was destroyed and never rebuilt. TPC Group discontinued butadiene production at the site and repurposed the 218-acre property as the Port Neches Terminal, a storage and transfer facility handling crude C4, butadiene, and raffinate by pipeline, barge, rail, and tank car, with more than 70 full-time employees.23TPC Group. TPC Group Contact – Port Neches Terminal