EPA Finalizing Marine Emission Standards

WASHINGTON, D.C. — The Environmental Protection Agency (EPA) is finalizing emission standards for new marine diesel engines with per-cylinder displacement at or above 30 liters (called Category 3 marine diesel engines) installed on U.S. vessels. These emission standards are equivalent to those adopted in the International Convention for the Prevention of Pollution from Ships.


The emission standards apply in two stages. Near-term standards for newly built engines will apply beginning in 2011; long-term standards requiring an 80 percent reduction in nitrogen oxide emissions will begin in 2016.

They are also finalizing a change to our diesel fuel program that will allow for the production and sale of 1,000-ppm sulfur fuel for use in Category 3 marine vessels. The new fuel requirements will generally forbid the production and sale of other fuels above 1,000-ppm sulfur for use in most U.S. waters, unless alternative methods are used to achieve equivalent emissions reductions.

This final rule is effective on June 29, 2010.

This action affects companies that manufacture, sell, or import into the United States new marine compression-ignition engines with per cylinder displacement at or above 30 liters for use on vessels flagged or registered in the United States. Affected categories and entities include the following: manufacturers of new marine diesel engines, marine vessels, engine repair and maintenance, water transportation, freight and passenger vessels, petroleum refineries, petroleum bulk stations and terminals; petroleum and petroleum products wholesalers, coastal freight and passenger transportation.

The greatest improvements in visibility will occur in coastal areas. For example, in 2030 Acadia National Park will have a 6 percent improvement with the coordinated strategy.

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