California Air Resources Board

In 2006, the Legislature passed the California Global Warming Solutions Act of 2006 [Assembly Bill 32 (AB 32)], which created a comprehensive, multi-year program to reduce greenhouse gas emissions in California. The 2022 Scoping Plan for Achieving Carbon Neutrality lays out a path to achieve targets for carbon neutrality and reduce anthropogenic greenhouse gas emissions by 85 percent below 1990 levels no later than 2045.  AB32 includes a list of greenhouse gases to be regulated including carbon dioxide, methane, sulfur hexafluoride, and hydrofluorocarbons.  CARB has developed comprehensive enforcement programs to ensure that greenhouse gas emissions reductions envisioned by the Board are achieved.  Those programs and the location of their compliance information are shown below.

• Cap-and-Trade Regulation – See this page and the Cap-and-Trade Market Monitoring webpage for more information
• Regulation for Mandatory Reporting of Greenhouse Gas Emissions (MRR) – See this page and the MRR Enforcement webpage for more information
• Low Carbon Fuel Standard (LCFS) – See the “Field Operations” tab of this report and the LCFS Enforcement webpage for more information
• Alternative Diesel Fuel Regulation (ADF) – See the “Field Operations” tab of this report
• Landfill Methane Gas Regulation (LMR) – See this page
• Refrigerant Management Program (RMP) – See this page
• Sulfur Hexafluoride Regulations – See this page that includes the combined enforcement data for the following three regulations:
  • Sulfur Hexafluoride from Non-Electric Non-Semiconductor Sources
  • Regulation for Reducing Sulfur Hexafluoride Emissions from Gas Insulated Switchgear 
  • Semiconductor Regulation
• Stationary Hydrofluorocarbon Reduction Measures (HFC) – See this page 
• California Oil and Gas Regulation (COGR) – See this page

The tables below provide the number of investigations and inspections for multiple climate regulations. “Investigations Opened” represents investigations initiated for a regulated entity. “Violations Determined” represents the total number of violations found for that year which can exceed the number of investigations in instances where multiple exceedances are found during an inspection. Most of these programs rely on quarterly and annual reporting requirements and result in complex cases that typically require longer than one year to complete. 

The "Oil and Gas Inspection (2022)" table displays data from joint inspections between CARB the US Environmental Protection Agency (US EPA), the California Geologic Energy Management Division (CalGEM), and local air districts. In 2023, CARB participated in the Methane Task Force to inspect active and idle wells with CalGEM and local air districts. The number of violations in 2023 include non-compliance with CARB, CalGEM, and/or air district regulations. All violations of CARB’s oil and gas regulation, COGR, were issued by the local air district. For more details, visit the Oil and Gas Enforcement page.