Regulations for Emissions from Vehicles and Engines

Regulations for Emissions from Marine Vessels

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Overview

EPA regulates a variety of marine vessels ranging in size and application from personal yachts boats to large ocean-going vessels. This web page contains information specific to marine diesel engines.

Diesel marine engines emit significant amounts of pollutants like nitrogen oxides (NOx) and particulate matter (PM), both of which have serious public health effects. 

New marine diesel engines must meet increasingly stringent emissions requirements. EPA has a coordinated strategy to address emissions from large ships in the United States and internationally. EPA’s coordinated strategy includes:

  • EPA domestic actions under the Clean Air Act; and
  • U.S. Government action through the International Maritime Organization.

Combined, these actions make a comprehensive program that is expected to significantly improve U.S. air quality and public health.

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List of Related Regulations

Below is a list of all regulations related to emissions from marine vessels. 

Click the regulation titles for additional information, including:
  • Rule summaries;
  • Regulatory impact analyses;
  • Comment summaries;
  • Rule histories; and 
  • Fact sheets.*

*Note: Rule-related materials vary by rule.

Regulation Title Regulation Date
(Year/Month)
Final Rule for Control of Emissions From New Marine Compression-Ignition Engines at or Above 30 Liters Per Cylinder - 40 CFR Parts 9 and 94 2003/02
Direct Final Rule for Great Lakes Steamship Repower Incentive Program 2012/01
Final Rule for Control of Emissions From Nonroad Spark-Ignition Engines and Equipment 2008/10
Final Rule for Control of Emissions From New Marine Compression-Ignition Engines at or Above 30 Liters per Cylinder 2010/04
Final Rule for Amendment to Emission Requirements Applicable to New Gasoline Spark-Ignition Marine Engines 1997/04
Final Rule for Technical Amendments for Marine Spark-Ignition Engines and Vessels 2008/10
Final Rule for Control of Emissions of Air Pollution From Locomotive Engines and Marine Compression-Ignition Engines Less Than 30 Liters per Cylinder 2008/06
Final Rule for Control of Emissions of Air Pollution From New Marine Compression Ignition Engines at or Above 37 kW 1999/12
Direct Final Rule for Technical Amendments for Marine Spark-Ignition Engines and Vessels 2010/09
Final Rule for Gasoline Spark-Ignition Marine Engines; Exemptions for New Nonroad Compression-Ignition Engines at or Above 37 Kilowatts and New Nonroad Spark-Ignition Engines at or Below 19 Kilowatts 1996/10
Direct Final Rule for Control of Air Pollution From New Motor Vehicles; Revisions to Motor Vehicle Diesel Fuel Sulfur Transition Provisions; and Technical Amendments to the Highway Diesel, Nonroad Diesel, and Tier 2 Gasoline Programs 2005/11
Final Rule for Test Procedures for Testing Highway and Nonroad Engines and Omnibus Technical Amendments 2005/07
Final Rule for Control of Emissions of Air Pollution From Nonroad Diesel Engines 1998/10
Final Rule for Regulation of Fuels and Fuel Additives: Modifications to the Transmix Provisions Under the Diesel Sulfur Program 2012/12
Final Rule for Nonroad Technical Amendments 2014/02

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