Overview

The California greenhouse gas (GHG) Inventory compiles statewide anthropogenic GHG emissions and sinks. It includes estimates for carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), sulfur hexafluoride (SF6), hydrofluorocarbons (HFCs), and perfluorocarbons (PFCs). The current inventory covers years 1990 to 2004.

Data sources include California and federal agencies, international organizations, and industry associations. The calculation methodologies are consistent with IPCC guidance. The current inventory uses global warming potential (GWP) from the IPCC Second Assessment Report to be compatible with the national inventory. Full documentation of data sources and methods is available to the public on this web site.

Assessing the scope of the reductions California has to make to return to the 1990 emissions level by 2020 requires a forecast of the emissions that would occur in 2020 if no actions are taken.

Current Inventory

Two versions are available. The first version is process oriented and follows the IPCC categorization to ensure comparability with international inventories, which are organized in a similar manner. The second version of the inventory is the based on sectors of economic activity and allows for comparison with other ARB emissions inventories, which are similarly categorized.

Select a subset of the inventory

Query the inventory by economic sector and/or by activity. This interactive query tool allows you to select a subset of the inventory in a table, view it or download it to your computer, find out how each of the emissions values was estimated, and plot the data. More details on the query tool's help page.

Download the entire inventory

• 1990-2004 inventory by IPCC category - Full Detail
• 1990-2004 inventory by IPCC category - Full Detail
• 1990-2004 inventory by IPCC category - Summary
• 1990-2004 inventory by economic sector - Full Detail
• 1990-2004 inventory by economic sector - Full Detail
• Land Use, Land Use Change, and Forestry - Net CO2 Flux