CA Air Resources Board GHG Calculator

Are you subject to California Air Resources Board’s Mandatory GHG Reporting?

Find out with Locus’ CO2 estimator
Select Fuel Type
Select Units for Emission Factor
Emission Factor
Calculated CO2 kg t
Sum of all calculated CO2 emissions
Fuel Type Calculated CO2 (kg) Calculated CO2 (t)
How to Use the GHG Calculator

You can use the rough calculator above to determine if your facility may be subject to the reporting rules. Select all fuels that you use for stationary combustion (such as boilers, heaters, flares, ICE, turbines, etc.) and list your fuel usage during calendar year in question.

Please remember not to include the fuel used in:

  • Portable equipment
  • Backup or emergency generators
  • Fire suppression systems and equipment
  • Irrigation agricultural pumps

For each of your fuels used in stationary combustion, use the following steps:

  • Select fuel
  • Enter annual throughput (fuel use) in specified units (if MMBtu available instead of mass/volume of fuel, select units in “kg CO2 /MMBtu” before entering throughput value)
  • Click on Calculate
  • Click on Add to Total
  • Repeat steps 1-4 for every fuel used

If you have trouble selecting fuel type or seeing emission factor, try refreshing the page.

Additional regulations apply for specific types of facilities. If you have any questions regarding your California applicability or other GHG reporting requirements, email one of Locus’ GHG experts.

For the EPA’s Final Mandatory Reporting of Greenhouse Gases Rule’s reporting requirements, please access EPA’s Greenhouse Gas Equivalencies Calculator.

About GHG Reporting Requirements

According to the current (December 2011) version of the ARB Greenhouse Gas (GHG) reporting rule, some types of facilities must report regardless of the quantity of emissions. This list is available in Table A-3 of 40 CFR Part 98, with California-specific amendments in 95101(a)(1):

  • Electricity generation (if not powered solely by nuclear, hydroelectric, wind, or solar energy)
  • Adipic acid production
  • Aluminum production
  • Ammonia manufacturing
  • Cement production
  • HCFC-22 production
  • HFC-23 destruction (if destroys >2.14 MT of HFC-23 and is not collocated with HCFC-22 production facility)
  • Lime manufacturing
  • Nitric acid production
  • Petrochemical production
  • Petroleum refineries
  • Phosphoric acid production
  • Silicon carbide production
  • Soda ash production
  • Titanium dioxide production
  • Municipal solid waste landfills (if a site generates >1,190 MT of CH4)
  • Manure management systems (if a site generates >25,000 MT CO2e in CH4 and N2O combined)
  • Electrical transmission and distribution systems
  • Underground coal mines (if site is subject to quarterly or more frequent ventilation inspections by the Mine Safety and Health Administration (MSHA))
  • Geologic carbon sequestration
  • Electrical equipment manufacture or refurbishment
  • Injection of carbon dioxide
  • Suppliers of fuel for consumption within California (if the equivalent of >10,000 MT CO2 is produced, imported, or delivered)
  • CO2 Production
  • CO2 Suppliers (when bulk imports or exports are > 10,000 MT CO2)
  • Electricity power entities, including importers, exporters, and retailers
  • Petroleum and natural gas systems (if emitting >10,000 MT CO2e from stationary sources, or >25,000 MT CO2e from stationary sources, processes, and vents)

If your facility falls in one of the above categories, GHG reporting is required. Otherwise, the reporting threshold of 10,000 MT CO2e applies starting in the 2012 reporting year. You can review a summary of applicability details or read the complete regulation at the CA ARB website.