CCI LogoThis page last reviewed January 2, 2018

Cap-and-Trade Auction Proceeds

Emission Factor Database Archive

The California Air Resources Board (CARB) is required to develop quantification methods for agencies receiving Greenhouse Gas Reduction Fund (GGRF) appropriations per SB 862 (Senate budget and Fiscal Review Committee, Chapter 36, statutes of 2014).  All California Climate Investments (CCI) must reduce greenhouse gas (GHG) emissions. CARB is responsible for providing guidance on quantifying GHG emission reductions and co-benefits from all CCI projects.  

In an effort to increase transparency and continue to use the most up to date emission factors when estimating CCI project benefits, CARB released a single repository for GHG and co-benefit emission factors used in quantification methodologies available at:  The CCI Quantification Methodology Emission Factor Database and Documentation include emission factors used in CARB quantification methodologies released after August 30, 2017.  CARB adds emission factors and documentation applicable to CCI programs as FY 2017-18 quantification methodologies become available.  When appropriate, CARB updates emission factors to incorporate the most recently available data.  When updates are made, the previous versions of the CCI Quantification Methodology Emission Factor Database and Documentation remain available from this webpage.

Note: These emission factors have been developed specifically for the Greenhouse Gas Reduction Fund Programs and are not intended for use in other programs.

Please email questions to  To help us serve you better, please provide the following information: name and company/industry, contact information, and question or comment.

Dates of Use Database & Documentation FilesMajor Updates
August 30, 2017 - January 1, 2018Updates to select passenger auto greenhouse gas emission factors

Return to Top of Page

To receive electronic notices of meetings and materials, you can sign up for the Auction Proceeds Email List.

For questions, please contact: