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Quantification Materials

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.  The table below provides links to CARB quantification methodologies and calculator tools developed in consultation with administering agencies through a public process.  CARB staff periodically update methodologies to make them more robust, user-friendly, and appropriate to the projects being quantified.

In addition to GHG emission reductions, FY 2017-18 quantification methodologies are being developed to also estimate other benefits and key variables.  New or updated methodologies will be posted below as necessary.  CARB continues to develop methods to assess additional social, economic, and environmental co-benefits achieved by CCI projects. More information on CCI co-benefits, including assessment methods can be found at:

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

For questions about any of the quantification methods below, please email us at  To help us serve you better, please provide the following information: name and company/industry, contact information, and question or comment.

Emission Factor Database:

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.  The CCI Quantification Methodology Emission Factor Database and Documentation below include emission factors used in CARB quantification methodologies released after August 30, 2017.  CARB will add emission factors and documentation applicable to CCI programs as FY 2017-18 methodologies become available.
Archived versions of the Database and Documentation can be found at:

Sustainable Communities and Clean Transportation

Agency / Department Quantification Materials
High-Speed Rail Authority (HSRA)

High-Speed Rail (HSR)
Archived Versions:
California State Transportation Agency (CalSTA)

Transit and Intercity Rail Capital Program (TIRCP)
Note: CARB staff has been notified of a minor error with the Quantifiable Component 3 tab of the TIRCP Calculator Tool for FY 2018-19. Applicants should not use tab 3 and proceed to tab 4. If applicants have already completed the Quantifiable Component 3 tab, CARB staff will make adjustments during the application review process, as needed.

Archived Versions:
Department of Transportation (Caltrans)

Low Carbon Transit Operations Program (LCTOP)
Active Transportation Program (ATP)
Note: This is a new Quantification Methodology specific to CTC ATP Projects that are eligible for GGRF funding. The SGC AHSC Quantification Methodology and Calculator Tool for FY 2015-16 may not be used for this program.

Strategic Growth Council (SGC)

Transformative Climate Communities (TCC) Program

Affordable Housing and Sustainable Communities (AHSC) Program

*A new version of CalEEMod (Version 2016.3.2) was released in early October 2017.  Please continue to use CalEEMod Version 2016.3.1 when completing the Revised AHSC Quantification Methodology for FY 2016-17.

Note: A track-change version of the updates to the June 5, 2017 Quantification Methodology is available here.

Archived Versions:

Sustainable Agriculture Land Conservation (SALC) Program

Archived Versions:
California Air Resources Board (CARB)

Low Carbon Transportation (LCT)

Clean Vehicle Rebate Project (CVRP):

Consumer-Based Light-Duty Projects:
Archived Versions:

Clean Truck and Bus Vouchers:
 - Hybrid and Zero-Emission Truck and Bus Voucher Incentive Project (HVIP)
 - Low NOx Engine Incentives

Consumer-Based Heavy-Duty Projects: 
Archived Versions:

Advanced Technology Demonstration Projects:
 - Off-Road Advanced Technology Demonstration Project
 - On-Road Advanced Technology Demonstration Project
Archived Versions:
- Multi-Source Facility Demonstration Project

- Zero-Emission Drayage Truck Demonstration Project

Car Sharing and Mobility Options in Disadvantaged Communities Pilot Project
Archived Versions:

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Energy Efficiency and Clean Energy

Agency / Department Quantification Materials
Community Services and Development (CSD)

Low-Income Weatherization Program
Archived Versions:

Low-Income Weatherization Program - Large Multi-Family
Department of Food and Agriculture (CDFA)

Dairy Digester Research and Development Program
Archived Versions:

Alternative Manure Management Program (AMMP)

Healthy Soils Program

State Water Efficiency and Enhancement Program
Archived Versions:

State Water Efficiency and Enhancement Program - DWR
(Prop 1) Joint Project
Department of Water Resources (DWR)
Water-Energy Grant Program
*October 6, 2017: The Water-Energy Grant Program GHG Calculator tool for FY 2015-16 has been updated for final funding recipients to use during reporting on implemented projects for FY 2015-16 funds.  No changes were made to the quantification methodology document.

Archived Versions:
State Water Project Turbines
California Air Resources Board (CARB) Woodsmoke Reduction Program

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Natural Resources and Waste Diversion

Agency / Department Quantification Materials
California Department of Fish and Wildlife

Wetlands Restoration for Greenhouse Gas Reduction Grant Program
Department of Forestry and Fire Protection

Forest Health Program
*Accepting public comments on the Draft Quantification Methodology and Draft Forest Health Calculator for FY 2017-18 through February 16, 2018.

Archived Versions:
Urban and Community Forestry Program
*Accepting public comments on the Draft Quantification Methodology and Draft UCF Calculator for FY 2017-18 through February 21, 2018.

Archived Versions:
Department of Resources Recycling, and Recovery (CalRecycle) 

Waste Diversion Grant and Loan Program
For additional information on how the emission reduction factors used in the calculator were developed, see:
*CARB released a FY 2015-16 quantification methodology in June 2016.  The joint FY 2015-16 and FY 2016-17 released in December 2016 contains only minor changes from that version. 

Archived Versions:
California Natural Resources Agency (CNRA) Urban Greening Grant Program 
Archived Versions:

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