Workshop to Discuss Updates to CARB’s EMFAC202x Model

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Workshop to Discuss Updates and Impacts from CARB’s EMFAC202x Model

The California Air Resources Board (CARB) invites you to participate in a workshop on Tuesday, December 15, 2020 to discuss updates and overall impacts to the on-road mobile source emissions inventory, EMFAC202x.  This will be the third and final public workshop to discuss the major updates to EMFAC202x and the overall impacts from the changes mentioned in the last two workshops in October 2019 and July 2020.

This meeting will be conducted through the GoToWebinar online webinar system and questions from participants will be taken using the webinar software.

DATE:                December 15, 2020
TIME:                10:00 a.m. – 12:00 p.m.


Tentative Agenda

  • 10:00 a.m.  – 11:00 a.m.: Major Updates and Overall Impacts
  • 11:00 a.m.  – 12:00 p.m.: Q&A and Next Steps

All times listed above are approximate and will depend on the amount of questions and discussion. The workshop materials will be posted in advance of the workshop on CARB's Mobile Source Emission Inventory webpage.


The past several decades have seen dramatic improvements in air quality as a result of regulations that reduced emissions from stationary and mobile sources.  However, substantial additional emissions reductions are necessary to meet more stringent ozone air quality standards and California’s long-term greenhouse gas emissions reduction goals.  CARB is expanding its mobile source analysis tools to support air quality planning focused on achieving these goals. 

The EMFAC model is the primary tool that CARB uses to assess emissions from on-road vehicles including cars, trucks, and buses. This will be the third and final public workshop to discuss the development of the latest version of the EMFAC model, also known as EMFAC202x.  At the webinar, staff will provide a brief description of updates, emission impacts, and the differences between the new estimates and those from the prior version of the model, EMFAC2017.

Special Accommodation Request

Consistent with California Government Code Section 7296.2, special accommodation or language needs may be provided for any of the following:

  • An interpreter to be available at the meeting;
  • Documents made available in an alternate format or another language;
  • A disability-related reasonable

To request these special accommodations or language needs, please contact Satya Sardar at (626) 450-6137, or Fang Yan at (916) 324-6971 as soon as possible, but no later than five business days before the scheduled meeting. TTY/TDD/Speech to Speech users may dial 711 for the California Relay Service.