The Third Circuit Court of Appeals ruled on October 14, 2026, that the Pennsylvania Department of Environmental Protection (PADEP) acted reasonably in granting permits for a natural gas pipeline expansion. The ruling affects environmental groups, including the Delaware Riverkeeper Network, which challenged the permits, arguing they did not adequately protect water quality. This decision is significant as it reinforces the state's authority to issue permits for energy projects while balancing environmental concerns.
The case, Delaware Riverkeeper Network v. Pennsylvania Environmental Hearing Board, docket number 25-2134, arose after Transcontinental Gas Pipe Line Company (Transco) sought to expand its natural gas transmission capabilities through Pennsylvania, New Jersey, and Maryland. The project required federal and state permits, including a certificate of public convenience and necessity from the Federal Energy Regulatory Commission (FERC). After obtaining a conditional certificate from FERC, Transco applied for a Water Quality Certification from PADEP, which issued the necessary permits after public hearings and reviews.
The Delaware Riverkeeper Network and other environmental groups, collectively referred to as the Riverkeepers, challenged PADEP's decision, claiming the permits did not meet the Commonwealth's environmental standards. They argued that PADEP failed to require sufficient data on water quality and did not adequately assess the potential environmental impacts of the project. The Riverkeepers' appeal was dismissed by the Pennsylvania Environmental Hearing Board, prompting them to petition the Third Circuit for review.
The court, led by Judge Matey, affirmed the Board's decision, stating, "Pennsylvania’s actions were reasonable, and without regulatory or constitutional concerns, we will deny the petition." The court clarified that it would review state agency actions under the arbitrary and capricious standard, which requires that agencies act within their authority and make reasonable decisions based on available data.
In its ruling, the court found that PADEP had considered extensive information regarding water resources and site conditions before issuing the permits. The Board had determined that the project would not cause significant environmental harm, as there was no evidence of actual degradation resulting from the pipeline's construction. The court noted that Riverkeepers did not provide sufficient evidence to support their claims that PADEP's actions were unreasonable.
The court also addressed the Riverkeepers' arguments regarding the Environmental Rights Amendment, which mandates that the state conserve and maintain public natural resources. The court concluded that PADEP's compliance with existing environmental regulations satisfied its constitutional duties under the Amendment. The court emphasized that the Amendment's broad language does not impose stricter requirements than those found in the detailed environmental regulations already in place.
This ruling has implications for future energy projects in Pennsylvania and potentially sets a precedent for how environmental challenges to state permits will be evaluated in the courts. It underscores the importance of balancing environmental protection with the need for energy infrastructure development.
Looking ahead, it is unclear whether the Riverkeepers will seek to appeal this decision to the U.S. Supreme Court. However, this case highlights the ongoing tensions between environmental advocacy and energy development in the region.