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Regulations for Emissions from Vehicles and Engines

Domestic Regulations for Emissions from Marine Compression-ignition (Diesel) Engines

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EPA is amending the national marine diesel engine program to provide relief provisions to address concerns associated with obtaining and installing certified Tier 4 marine diesel engines in certain high-speed commercial vessels. The relief is in the form of additional lead time for qualifying engines and vessels. EPA is also modifying the marine diesel engine certification program by streamlining engine certification requirements.  These changes will promote Tier 4 certification of engines with high power density.

Overview

EPA has adopted exhaust emission standards for marine diesel engines installed in a variety of marine vessels ranging in size and application from small recreational vessels to tugboats and large ocean-going vessels.

These domestic emission standards apply for engines installed on U.S. vessels.

Additional international requirements may apply for engines installed on U.S. vessels that operate in foreign ports and waters and for foreign vessels.

Learn more:

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List of Related e-CFR Links

See the Electronic Code of Federal Regulations (e-CFR) for the full text of current domestic regulations that apply to marine diesel engines and vessels.

e-CFR link Summary of what you will find
40 CFR Part 1042 Emission standards and certification requirements for marine diesel engines
40 CFR Part 1043 Regulations implementing MARPOL Annex VI, including requirements for in-use fuels, marine diesel engines above 130 kW, and vessels with those engines
40 CFR Part 1065 Exhaust emission test procedures (for lab and in-field testing)
40 CFR Part 1068 General compliance provisions
40 CFR Part 1090 Sulfur limits for in-use marine diesel fuel

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List of Related Regulations

Below is a list of all domestic regulations related to emissions from marine compression-ignition (diesel) engines. 

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

*Note: Rule-related materials vary by rule.

Regulation Title Referenced Tier Level(s)
(if applicable)
Regulation Date
(Year/Month)
Final Rule for Amendments Related to Marine Diesel Engine Standards  Tier 4 2020/08
Proposed Amendments Related to Marine Diesel Engine Standards Tier 4 2019/09
Greenhouse Gas Reporting Program (GHGRP)   2009/10
Final Rule for Control of Emissions From New Marine Compression-Ignition Engines at or Above 2.5 Liters Per Cylinder Tier 1 2003/02
Direct Final Rule for Great Lakes Steamship Repower Incentive Program   2012/01
Final Rule for Control of Emissions From New Marine Compression-Ignition Engines at or Above 30 Liters per Cylinder   2010/04
Final Rule for Control of Emissions of Air Pollution From Locomotive Engines and Marine Compression-Ignition Engines Less Than 30 Liters per Cylinder Tier 3, Tier 4 2008/06
Final Rule for Control of Emissions of Air Pollution From New Marine Compression-Ignition Engines at or Above 37 kW Tier 2 1999/12
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 Tier 2, Tier 3 1998/10
Final Rule for Nonroad Technical Amendments   2014/02

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