Sponsors
Introduced July 10, 2025 by Alejandro Padilla · Last progress July 10, 2025
The bill would sharply reduce maritime greenhouse gas and port-area air pollution—improving climate outcomes and local health and spurring clean‑tech markets—but does so at the cost of substantial near‑term compliance and infrastructure expenses, supply‑chain and workforce disruption, and risk that feasibility concessions could weaken long-term benefits.
Nationwide and lifecycle greenhouse gas emissions from covered vessels would fall substantially (targets up to ~100% by 2050 and elimination of in-port emissions by 2035), advancing U.S. climate goals.
People living and working near ports and anchorages would experience lower exposure to criteria air pollutants (NOx, particulates) and therefore better local air quality and public health outcomes if in-port emissions are eliminated by 2035.
Standards would stimulate demand for zero-emission vessel technologies and shore power infrastructure, creating new markets and jobs in clean maritime technologies.
Ship owners, operators, and ports would face substantial compliance costs (retrofitting/replacing vessels, buying low‑carbon fuels, installing shore power), which are likely to raise freight and consumer prices.
If some standards are scaled back under the statute's 'maximum feasible' or feasibility considerations, expected emissions and air‑quality benefits could be delayed or reduced, undermining the law's goals.
Operational and supply‑chain challenges — including scarcity and high cost of low‑carbon fuels, and the need to retrofit or replace vessels — could create practical obstacles and transitional disruptions for maritime operators.
Based on analysis of 3 sections of legislative text.
Requires EPA to set marine fuel carbon‑intensity standards for large vessels with phased reductions through 2050 and to eliminate berth/anchorage emissions by 2035 (or achieve max feasible reductions).
Creates a new federal program to cut greenhouse gas emissions from large commercial ships that visit U.S. ports. The EPA must set a Marine Greenhouse Gas Fuel Standard that measures fuel carbon intensity for vessels 400 gross tons or larger on voyages to or from U.S. ports, with phased percent reductions from a 2027 baseline through 2050, and must require elimination of vessel emissions while at berth or at anchorage in the U.S. contiguous zone by 2035 (or the maximum feasible reductions if full elimination is not possible). The law also requires annual monitoring and reporting by vessel owners/operators, allows averaging and banking across commonly owned fleets, and directs the EPA to publish annual compliance reports in coordination with the Department of Transportation and the Coast Guard.