Clean Shipping Act of 2025
- Bill Number
- H.R. 4325
- Origin Chamber
- House
- Congress
- 119th Congress, Session 1
- Policy Area
- Environmental Protection
- Status
- Introduced
- Latest Action
- 2025-07-10: Referred to the House Committee on Energy and Commerce.
- Last Updated
- 2025-12-16T09:05:18Z
AI-Generated Summary
Purpose
The Clean Shipping Act of 2025 aims to reduce greenhouse gas emissions from commercial maritime shipping by establishing strict standards for the carbon intensity (emissions per unit of energy) of fuels used by large vessels on U.S.-related voyages and requiring zero emissions from vessels while at anchor or docked in U.S. coastal waters. This supports broader efforts to combat climate change by targeting the shipping industry's environmental impact.
Key Provisions
- Marine Greenhouse Gas Fuel Standard (New Section 212A of the Clean Air Act):
- Applies to vessels of 400 gross tons or more on "covered voyages," defined as commercial trips transporting passengers or cargo between U.S. ports or between U.S. and foreign ports.
- Defines key terms, such as:
- Carbon intensity: Lifecycle greenhouse gas emissions (from production to use) per unit of fuel energy, measured in grams of carbon dioxide-equivalent per megajoule.
- Carbon intensity baseline: Average carbon intensity of fuels used by all such vessels in 2027.
- Greenhouse gases: Includes carbon dioxide, methane, nitrous oxide, and certain fluorinated gases.
- Mandates progressive reductions in fuel carbon intensity compared to the 2027 baseline:
- 30% reduction for 2030–2034.
- 58% reduction for 2035–2039.
- 83% reduction for 2040–2044.
- 92% reduction for 2045–2049.
- 100% reduction (zero carbon intensity) starting in 2050.
- The Environmental Protection Agency (EPA) must finalize the first standard by January 1, 2029, and subsequent ones two years before they take effect.
- If full reductions are not technologically or economically feasible (considering factors like emissions reductions and impacts on health, safety, air/water quality, and waste), EPA must set the maximum achievable reduction.
- Allows alignment with stricter international standards from the International Maritime Organization (IMO).
- Exempts vessels on covered voyages for 30 days or fewer per year.
- Permits averaging carbon intensity across vessels under common ownership and crediting excess reductions toward future compliance.
- Requires EPA to develop consistent monitoring methods (aligned with EU and IMO where possible).
- Mandates annual reporting by vessel owners/operators on fuel use, carbon intensity, and total emissions for covered voyages.
- EPA must publish an annual public report summarizing data (with explanations for public understanding), which the Department of Transportation (DOT) republishes.
- In-Port Marine Vessel Zero Emission Standards (Addition to Section 213(e) of the Clean Air Act):
- Requires EPA to set standards by January 1, 2029, to eliminate emissions of greenhouse gases and "criteria" air pollutants (common pollutants like ozone precursors for which EPA has issued health-based standards) from vessels at anchor or berth in the U.S. contiguous zone (waters up to 24 nautical miles offshore) by January 1, 2035.
- If zero emissions are not feasible, EPA must achieve the maximum feasible reduction, considering net emission cuts and environmental/health impacts.
- Standards can be revised periodically.
- Enforcement:
- Treats violations of fuel standards and reporting as enforceable emission limits under the Clean Air Act, allowing for civil penalties, lawsuits, and other remedies.
Significant Changes to Existing Law
- Inserts a new section (212A) into the Clean Air Act specifically for maritime fuel carbon intensity, which previously lacked dedicated standards for shipping's greenhouse gas contributions.
- Adds a subsection (e) to Section 213, expanding existing nonroad engine emission controls to include in-port zero-emission requirements for greenhouse gases and criteria pollutants from vessels—previously focused more on engines and smaller sources.
- Integrates lifecycle emissions analysis (borrowed from renewable fuel standards) into maritime regulation, shifting from end-of-pipe controls to fuel production and use.
Potential Impacts
- Government Agencies: EPA gains primary rulemaking and enforcement authority, requiring new resources for monitoring, reporting, and feasibility assessments. DOT and the U.S. Coast Guard must collaborate on data publication and verification, potentially increasing interagency coordination.
- Citizens: Could improve air quality and public health near ports and coastal areas by reducing emissions, benefiting communities exposed to shipping pollution. However, higher shipping costs might indirectly raise prices for goods transported by sea.
- International Relations: Promotes harmonization with global IMO standards, potentially easing trade compliance for U.S. vessels abroad and encouraging international adoption of similar rules. May influence negotiations on maritime climate commitments but could create tensions if U.S. rules exceed foreign standards, affecting competitiveness.
- Environment: Targets significant cuts in shipping emissions (a major global source), aiding U.S. climate goals and reducing ocean and atmospheric pollution.
Main Stakeholders Affected
- Shipping Industry: Vessel owners and operators (especially those with fleets over 400 gross tons) must invest in low-carbon fuels (e.g., biofuels, hydrogen, or electricity), retrofit ships, or face penalties—potentially increasing operational costs.
- Fuel Suppliers: Producers of marine fuels will need to develop and supply lower-carbon options to meet standards.
- Environmental and Public Health Groups: Likely to support as beneficiaries of emission reductions, with opportunities to influence EPA rulemaking.
- Ports and Coastal Communities: Ports may need infrastructure for cleaner operations (e.g., shore power for zero-emission docking), while residents gain from reduced local pollution.
- International Shipping Partners: Foreign vessel operators calling at U.S. ports must comply, affecting global supply chains.
Notable Legal, Constitutional, or Political Implications
- Legal: Expands Clean Air Act authority to maritime sources without needing new legislation, using existing enforcement tools (e.g., citizen suits under Section 304). Feasibility exceptions provide flexibility to avoid judicial challenges on arbitrary standards, but reporting requirements could raise privacy concerns for proprietary fuel data.
- Constitutional: Relies on Congress's commerce clause power to regulate interstate and foreign commerce, including emissions from international voyages. No direct federalism issues, as it targets federal waters and commerce, but states may seek involvement in port enforcement.
- Political: Advances Democratic-led climate priorities by imposing phased, ambitious targets on a hard-to-decarbonize sector, potentially facing opposition from industry over costs and feasibility. Aligns with international pacts like the Paris Agreement, but could spark debates on economic burdens versus environmental benefits, especially in shipping-dependent regions.
This summary was generated by AI and may contain inaccuracies. Refer to the official source document for the authoritative text.
Sponsor
Cosponsors (16)
Rep. Barragán, Nanette Diaz [D-CA-44], Rep. Matsui, Doris O. [D-CA-7], Rep. Bonamici, Suzanne [D-OR-1], Rep. Tlaib, Rashida [D-MI-12], Rep. Cleaver, Emanuel [D-MO-5], Del. Norton, Eleanor Holmes [D-DC-At Large], Rep. Espaillat, Adriano [D-NY-13], Rep. Lieu, Ted [D-CA-36], Rep. Thompson, Bennie G. [D-MS-2], Rep. Nadler, Jerrold [D-NY-12], Rep. Huffman, Jared [D-CA-2], Rep. Castor, Kathy [D-FL-14], Rep. DeSaulnier, Mark [D-CA-10], Rep. Levin, Mike [D-CA-49], Rep. Garamendi, John [D-CA-8], Rep. Casten, Sean [D-IL-6]
Recent Actions
- 2025-07-10: Referred to the House Committee on Energy and Commerce.
- 2025-07-10: Introduced in House
- 2025-07-10: Introduced in House
Bill Versions
- Clean Shipping Act of 2025 — issued 2025-07-10 — PDF (10 pages)