ARB's Emission Inventory Activities
Last updated December 30, 2016
An emission inventory is an estimation of the amount of pollutants discharged into the atmosphere that can be broken down by specified source categories in a certain geographical area and within a specified time span (e.g., in a calendar year). This webpage provides links to ARB's various emission inventory programs.
Integrated Emissions Visualization Tool
ARB has developed an emissions visualization tool that allows users to locate and view emissions of greenhouse gases (GHG) and criteria pollutants from large facilities in California. The tool provides an interactive platform where users can select facilities by name, location, or industrial sector; view their reported emissions using maps, charts and tabular formats; and download data for later use.
- Start Emissions Visualization Tool
- Important Notes about the Tool
- Information on Oil and Gas Production Facilities
Greenhouse Gases
Annual Statewide Greenhouse Gas (GHG) Emission Inventory Program
- GHG Emission Inventory Home
- Current Statewide GHG Emission Inventory Data and Documentation
- 1990 Greenhouse Gas Emission Level and 2020 Limit
- 2020 Business-as-usual Emission Projection
Mandatory Reporting Program (GHG emissions for large emitters)
- GHG Facility and Entity Emissions Data includes annual carbon dioxide, methane, and nitrous oxide emissions reported by facilities and entities subject to the GHG Mandatory Reporting Regulation
Criteria Air Pollutants
Particulate Matter, Carbon Monoxide, Nitrogen Oxide, Sulfur Dioxide, Lead, and Reactive Organic Gases
Emissions Data
- Annual Statewide Emissions Summaries for mobile, stationary, areawide, natural, and top 25 sources
- Facility Emissions Data for individual facility emissions by region, industrial sector, or name
- Regional Emission Summaries for the state, air districts, air basins, counties, and by neighborhood
- Neighborhood Emissions Data mapping with the Community Health Air Pollution Information System and Regional Emission Summaries
- Trends in Emissions for historical data and future years
Mobile Source Emission Inventory
- The mobile source emission inventory is ARB's tool for assessing the population, activity, and emissions from mobile sources
Emissions Estimation Methods and Resources
- Emission Estimation Methods for computing emissions from stationary, mobile, areawide, and natural sources
- Emission Inventory Resources including publications, databases, tools, models, and special projects
- Air Pollutant Information for criteria and toxic pollutants including health effect and speciation profiles
Toxic Air Pollutants
- California Toxics Inventory for industrial, areawide, mobile, and natural sources
- AB 2588 Air Toxics Program for collection of air toxics emissions data from facilities
