Shore Power for Ocean-going Vessels

This page reviewed June 24, 2015


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

CARB issues Executive Order AB-15-01 - Clean Air Engineering-Maritime, Inc.

The California Air Resources Board (ARB) has issued an Executive Order (EO) to Clean Air Engineering-Maritime relating to ARB Approval of control efficiencies for alternative control technologies used for compliance with the airborne toxic control measure for Auxiliary Diesel Engines Operated on Ocean-going Vessels At-Berth in a California Port (At-Berth Regulation). The EO, AB-15-01, applies to Clean Air Engineering’s Marine Exhaust Treatment System-1.

CARB releases March 2015 Regulatory Advisory and associated forms

As specified in the March 2015 Regulatory Advisory, fleets need submit documentation to ARB to qualify for temporary relief. The Advisory and associated forms are available in the "Forms and Tools" section of this website.

Upcoming Due Dates


August 1, 2015

  • Fleets submit Regulatory Advisory forms for Q2 2015

November 1, 2015

  • Fleets submit Regulatory Advisory forms for Q3 2015

February 1, 2016

  • Fleets submit Regulatory Advisory forms for Q4 2015

March 1, 2016

  • Fleets submit 2015 annual compliance statement


April 1, 2016

  • Annual Wharfinger Data for 2015