Shore Power for Ocean-going Vessels

This page reviewed November 5, 2014


In December 2007, the Air Resources Board (ARB) approved the "Airborne Toxic Control Measure for Auxiliary Diesel Engines Operated on Ocean-Going Vessels At-Berth in a California Port" Regulation, commonly refered to as the At-Berth Regulation. The purpose of the At-Berth Regulation is to reduce emissions from diesel auxiliary engines on container ships, passenger ships, and refrigerated-cargo ships while berthing at a California Port. The At-Berth Regulation defines a California Port as the Ports of Los Angeles, Long Beach, Oakland, San Diego, San Francisco, and Hueneme. The At-Berth Regulation provides vessel fleet operators visiting these ports two options to reduce at-berth emissions from auxiliary engines: 1) turn off auxiliary engines and connect the vessel to some other source of power, most likely grid-based shore power; or 2) use alternative control technique(s) that achieve equivalent emission reductions.

What's New

Public Workshop to Discuss At-Berth Regulation

ARB staff will hold a public workshop on Thursday, November 6, 2014, to begin discussion on potential amendments to the At-Berth Regulation. Additional meeting materials will be posted here when available.

Meeting Materials:

CARB releases Notification and Reporting forms for the Regulatory Advisory

As specified in the December 2013 Regulatory Advisory, fleets need submit documentation to ARB to qualify for temporary relief. These forms are available in the "Forms and Tools" section of this website. We are also hosting an informational webinar on March 6, 2014 to discuss the forms.

Upcoming Due Dates


January 1, 2014

  • Recordkeeping begins for compliance with 50% requirements

March 1, 2015

  • Fleets submit 2014 annual compliance statement


April 1, 2015

  • Annual Wharfinger Data for 2014