Mandatory Greenhouse Gas Emissions Reporting 

This page updated November 4, 2016


Mandatory reporting logoInformation on California’s Mandatory Greenhouse Gas Reporting program.

What's New

NEW  2015 GHG Emissions Data Available and Updates to Posted 20112014 Data.  The 2015 GHG emissions data summary spreadsheet is now available. In addition, updated spreadsheets are posted for the 20112014 reported data. (11/4/2016)

bullet  Proposed Mandatory Reporting Regulation (MRR) and Staff Report Available. On September 22, 2016, the Air Resources Board conducted a public hearing to consider proposed amendments to MRR.  The regulatory documents are available here.  (Updated 9/30/2016)


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Reporting of greenhouse gases by major sources is required by the California Global Warming Solutions Act (AB 32, 2006). The Mandatory Reporting Regulation is applicable to industrial facilities, fuel suppliers, and electricity importers. All GHG emissions data reports must comply with the regulatory requirements and be submitted via the Cal e-GGRT reporting system.

Contact Us

For questions please contact Sector Contacts,, or Patrick Gaffney, Climate Change Reporting Section, 916.322.7303