Clean Shipping Act of 2025
- Bill Number
- S. 2261
- Origin Chamber
- Senate
- Congress
- 119th Congress, Session 1
- Policy Area
- Environmental Protection
- Status
- Introduced
- Latest Action
- 2025-07-10: Read twice and referred to the Committee on Environment and Public Works. (Sponsor introductory remarks on measure: CR S4317)
- Last Updated
- 2025-12-05T22:00:25Z
AI-Generated Summary
Purpose
The Clean Shipping Act of 2025 aims to reduce greenhouse gas emissions from commercial shipping by amending the Clean Air Act (CAA). It establishes standards to lower the carbon intensity (a measure of lifecycle greenhouse gas emissions per unit of fuel energy) of fuels used by large vessels on certain voyages and requires zero emissions from vessels while at anchor or berthed in U.S. contiguous waters.
Key Provisions
- Marine Greenhouse Gas Fuel Standard (New Section 212A of the CAA):
- Defines key terms, such as "carbon intensity" (grams of carbon dioxide-equivalent per megajoule of fuel energy), "covered voyage" (commercial transport of passengers or cargo involving U.S. ports or between U.S. and foreign ports), and "vessel" (ships of 400 gross tons or more).
- Mandates the Environmental Protection Agency (EPA) Administrator to set fuel carbon intensity standards for propulsion and onboard equipment, requiring reductions from a 2027 baseline:
- 30% reduction by 2030–2034.
- 58% by 2035–2039.
- 83% by 2040–2044.
- 92% by 2025–2049.
- 100% (net-zero) by 2050 and beyond.
- Standards must be finalized by January 1, 2029, for the first phase, and two years before each subsequent phase.
- Allows adjustments if reductions are not technologically or economically feasible, focusing on maximum achievable cuts while considering emissions reductions and impacts on health, safety, air/water quality, and waste.
- Permits adoption of stricter International Maritime Organization (IMO) standards if they meet or exceed U.S. requirements.
- Exempts vessels on covered voyages for 30 days or fewer per year; allows averaging of carbon intensity across commonly owned vessels and credits for overcompliance.
- Monitoring and Reporting:
- EPA develops consistent methods for tracking compliance, aligned with EU and IMO schemes.
- Vessel owners/operators must annually report fuel carbon intensity, usage, and total emissions per covered voyage.
- EPA, in consultation with the Department of Transportation (DOT) and Coast Guard, publishes a public report 180 days after each year, explaining emissions and fuel intensity; DOT republishes it within 30 days.
- In-Port Zero Emission Standards (New Subsection (e) to Section 213 of the CAA):
- Requires EPA to promulgate standards by January 1, 2029, eliminating greenhouse gas and criteria air pollutant (pollutants like ozone precursors regulated under CAA Section 108) emissions from vessels at anchorage or berth in U.S. contiguous waters (up to 24 nautical miles offshore) by January 1, 2035.
- Allows feasibility-based adjustments for maximum reductions, considering similar factors as fuel standards.
- Enforcement:
- Treats fuel standards and reporting as enforceable emission limits under CAA Section 304(a)(1), enabling citizen suits and penalties.
Significant Changes to Existing Law
- Inserts a new Section 212A into the CAA after Section 212, introducing the first federal standards specifically targeting lifecycle greenhouse gas emissions from marine fuels on U.S.-involved voyages.
- Adds Subsection (e) to Section 213, expanding existing nonroad engine emission controls to mandate zero-emission requirements for vessels in port areas, shifting from voluntary or state-level measures to nationwide federal rules.
- Integrates maritime emissions into the CAA's framework for the first time, linking them to broader air quality and climate goals without altering core CAA structures like state implementation plans.
Potential Impacts
- Government Agencies: EPA gains primary responsibility for rulemaking, monitoring, and reporting, increasing workload and requiring coordination with DOT and Coast Guard for data and enforcement. This could strain resources but enhance federal oversight of shipping emissions.
- Citizens: Communities near ports may benefit from reduced air pollution and greenhouse gases, improving local health and environmental quality; however, higher shipping costs could indirectly raise consumer prices for goods.
- International Relations: Promotes alignment with global IMO standards, potentially strengthening U.S. leadership in maritime climate policy and encouraging international adoption; may affect trade if foreign vessels face compliance burdens at U.S. ports.
Main Stakeholders Affected
- Shipping Industry: Owners and operators of large commercial vessels (e.g., cargo and passenger ships) must adopt low-carbon fuels (like biofuels or hydrogen) and zero-emission technologies (e.g., shore power or battery systems), facing compliance costs but opportunities for credits and averaging.
- Government Entities: EPA (regulation and reporting), DOT (publication and transport policy), and Coast Guard (enforcement at sea).
- Environmental and Public Health Groups: Benefit from emission reductions; may use enforcement provisions for oversight.
- Ports and Trade Partners: U.S. ports could see infrastructure upgrades (e.g., cleaner power supplies); international shippers and trading nations may need to adapt to U.S. standards for access.
Notable Legal, Constitutional, or Political Implications
- Legal: Enforcement via CAA citizen suits empowers public and NGO challenges, potentially leading to litigation over feasibility determinations or international harmonization; definitions draw from existing CAA and EPA regulations for consistency.
- Constitutional: Regulates interstate and foreign commerce under Congress's Commerce Clause authority, balancing environmental protection with economic impacts; feasibility clauses mitigate due process concerns by avoiding impossible mandates.
- Political: Advances U.S. climate commitments (e.g., Paris Agreement goals) through targeted maritime decarbonization, but could spark debates on economic feasibility for industry, federal overreach into global shipping, or trade implications; bipartisan potential in environmental committees, though opposition from shipping lobbies is likely.
This summary was generated by AI and may contain inaccuracies. Refer to the official source document for the authoritative text.
Sponsor
Recent Actions
- 2025-07-10: Read twice and referred to the Committee on Environment and Public Works. (Sponsor introductory remarks on measure: CR S4317)
- 2025-07-10: Introduced in Senate
Bill Versions
- Clean Shipping Act of 2025 — issued 2025-07-10 — PDF (10 pages)