The Pipeline Accountability Act of 2025 aims to significantly enhance pipeline safety, environmental protection, public engagement, and accountability across the United States. It mandates the establishment of an Office of Public Engagement within the Pipeline and Hazardous Materials Safety Administration (PHMSA) to foster greater community involvement and transparency. The bill also modifies PHMSA's standard-setting process by requiring consideration of global climate impacts, avoiding prolonged fossil fuel infrastructure, and promoting non-emitting alternatives, while reducing emphasis on certain cost-benefit analyses. The legislation strengthens the integrity of technical safety standards committees by prohibiting members with financial interests in the pipeline or fossil fuel industries and requiring financial disclosures. It clarifies that PHMSA regulations and standards, including those pre-dating the bill, shall be applied to existing pipelines, removing previous limitations. This ensures a consistent safety framework across all operational infrastructure. A key safety provision requires operators of covered pipelines in high consequence areas to install rupture-mitigation valves capable of isolating ruptured segments within 30 minutes, with compliance deadlines and a public-involved waiver process. The bill also mandates comprehensive rulemaking for carbon dioxide pipelines within 18 months, addressing minimum safety standards, potential impact areas, leak detection, fracture protection, and emergency response plans. Further regulations are required for geohazard assessment, reporting, and public notification regarding CO2 pipeline hazards. To address emerging energy concerns, the bill commissions a Comptroller General study on the safety and environmental impacts of hydrogen blending in natural gas systems. Crucially, it prohibits pipeline operators from transporting hydrogen (beyond trace amounts) in natural gas distribution pipelines until Congress enacts specific legislation for its safe regulation, with limited exceptions. Additionally, the Natural Gas Distribution Infrastructure Safety and Modernization Grant Program is modified to include pipeline retirement and encourage non-emitting alternatives , allocating significant funding and promoting fair labor practices. The Secretary is directed to promulgate or revise regulations within two years concerning underground natural gas storage , focusing on risk management, emergency response, and preventing single points of failure. Furthermore, the bill enhances transparency by requiring PHMSA to hold at least one public hearing for every proposed rule or revision, ensuring community input. A major transparency initiative involves expanding public disclosure of safety data by operators of covered facilities, including information on transported substances, decommissioning plans, emergency response details, and carbon dioxide dispersion modeling. Operators must provide this information on publicly accessible websites, update it annually, and notify affected residents and first responders. The bill also allows individuals to request detailed pipeline safety information, such as high consequence areas, incident history, and geohazards, and mandates rulemaking for standardized data formats. The legislation strengthens incident reporting requirements for gas pipelines, mandating reports for all gas releases of 50,000 cubic feet or more, regardless of intent, and for incidents causing fire, explosion, significant property damage, or specific bodily harm. To bolster accountability, the bill explicitly prohibits releases of gas or hazardous liquid that would trigger incident reporting. It also expands the ability of private persons to bring civil actions against operators for violations or against the Secretary for failing to perform nondiscretionary duties, allowing for civil penalties and injunctive relief. Finally, the bill removes the maximum civil penalty cap for a related series of violations, signaling a tougher stance on non-compliance.