Regulation ChangeProposedProposed Regulation
CARB proposes 2026 amendments to Mandatory Greenhouse Gas Reporting Regulation
Mandatory Greenhouse Gas Reporting RegulationCalifornia Air Resources BoardCalifornia
Announced
May 28, 2026
Description
CARB has proposed 2026 amendments to the Regulation for the Mandatory Reporting of Greenhouse Gas Emissions. The Board held a public hearing on May 28-29, 2026 (Resolution 26-6). The MRR was originally approved in 2007 and revised in 2010, 2012, 2013, and 2018. Covered entities should monitor the rulemaking for changes to reporting requirements.
Key Findings
CARB proposes 2026 amendments to Mandatory Greenhouse Gas Reporting Regulation
house Gas Emissions [2026 Rulemaking documents](//ww2.arb.ca.gov/rulemaking/2026/mrr2026) ### 2018 Regulation - Effective April 1, 2019 #### 2018 Amendments to CARB Mandatory Reporting Regulation The Regulation for the Mandatory Reporting of Greenhouse Gas Emissions was originally approved in 2007 and revised in 2010, 2012, 2013, and 2014. Amendments to MRR were approved by the Office of Administrative Law on March 2