The House of Representatives voted 216-211 on Tuesday to block California from enforcing stringent air pollution limits on ships docked at the state’s ports. The resolution seeks to revoke a federal waiver granted to California that permits it to implement stricter standards than those set at the national level, a long-standing provision under the Clean Air Act.
California’s clean ship rules are aimed at reducing harmful emissions from diesel engines on large container and cruise vessels while they are docked in ports such as Los Angeles, Long Beach, and Richmond. These vessels often run their engines continuously to power onboard systems, releasing pollutants including soot, smog, and carcinogens that can drift into nearby communities. The regulations mandate that ships either connect to local electric power sources or use emissions capture equipment to significantly reduce pollution.
The waiver allowing California to enforce these rules was granted by the Environmental Protection Agency (EPA) under the Biden administration. However, Republicans in the House, led by Representative Vince Fong of California, introduced the resolution under the Congressional Review Act to rescind the waiver. Fong argued that the regulations impose costly mandates that could disrupt supply chains, increase prices nationwide, and threaten energy security, emphasizing the economic impact on ports handling nearly 40% of U.S. containerized imports.
Supporters of the clean ship rules, including environmental and public health advocates, counter that the regulations will save lives and yield significant health benefits. California state officials project the rules could prevent 237 premature deaths, 75 hospital admissions, and 122 emergency room visits by 2032, estimating public health benefits of $2.3 billion compared to $2.2 billion in compliance costs for industry. Will Barrett, assistant vice president at the American Lung Association, condemned the House vote as an attempt to weaken essential protections for vulnerable communities near ports.
California Governor Gavin Newsom criticized the House decision on social media, accusing House Republicans of prioritizing the interests of the oil industry over public health in port communities.
In addition to Tuesday’s vote, Representative James Gallagher, also a Republican from California, has introduced a separate measure aimed at blocking pollution limits for ships while sailing in state waters. A House vote on that resolution is expected later this week.
The validity of congressional actions to revoke California’s waivers is currently under legal scrutiny. On Sept. 2, U.S. District Judge Beryl Howell ruled that EPA Administrator Lee Zeldin acted improperly by presenting the waivers as subject to congressional review under the Congressional Review Act. Judge Howell further noted recent federal court orders indicating that the Trump administration’s efforts to undo the waivers appeared closely aligned with petroleum industry interests. The Department of Justice has appealed the ruling, and ongoing litigation also challenges the withdrawal of California’s waiver related to vehicle emissions standards.
The House vote marks the latest chapter in a broader GOP-led effort to counter California’s environmental regulations, following last year’s congressional move to block the state's 2035 ban on new gasoline-powered car sales. The forthcoming Senate consideration of the ships-related resolution remains uncertain.