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Calculating GHG Totals by Industry
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This page explains how emissions from individual facilities are aggregated to industry totals. To learn about what industry groups a facility falls in, visit Understanding Facility Types.

A large number of facilities only report emissions from a single activity at the facility. In such cases, ALL the emissions from the facility are allocated to the industry type associated with the facility.

Other facilities reported emissions from stationary combustion as well as some other type of process occurring at the facility (such as petroleum refining, iron and steel production, cement production, etc.). GHG emissions from these other processes are generally referred to as 'process' emissions. In these cases, ALL the emissions from the facility (with a few exceptions 1) are allocated to the industry type associated with the process emissions. For example, for a facility with iron and steel process emissions and stationary combustion emissions, the total emissions for the facility are assigned to the iron and steel industry.

In some cases, a facility may report emissions from two separate and unique processes, but no emissions from stationary combustion. For example, a facility may be both a power plant and an iron and steel mill. In these cases, EPA includes the emissions associated with electricity generation in the electricity generation industry total, and the emissions from iron and steel production in the iron and steel industry total.

In a small number of cases, facilities report emissions from stationary combustion as well as two or more other processes. For example, a refinery who also produces petrochemicals would report the total process emissions from petroleum refining, the total process emissions from petrochemical production and the total emissions from stationary combustion. EPA is unable to determine the portion of the stationary combustion emissions that should be included in each industry group's total. In these cases, EPA attributes 100% of the stationary combustion emissions to the industry type considered to be most fossil fuel intensive. The list below shows the hierarchy of industry types considered. In the case where a facility reports emissions from 2 or more of the process listed below, the emissions from stationary combustion are attributed to the highest ranking process on this list.

 
  1. Petroleum Refining
  2. Cement Production
  3. Iron & Steel Production
  4. Pulp and Paper Manufacturing
  5. Aluminum Production
  6. Petrochemical Production
  7. Petroleum and Natural Gas Systems: Liquefied Natural Gas (LNG) Import/Export
  8. Petroleum and Natural Gas Systems: Gas Processing
  9. Petroleum and Natural Gas Systems: Transmission/Compression
  10. Petroleum and Natural Gas Systems: Offshore Production
  11. Petroleum and Natural Gas Systems: Underground Storage
  12. Soda Ash Production
  13. Ammonia Manufacturing
  14. Adipic Acid Production
  15. Lime Manufacturing
  16. Lead Production
  17. Magnesium Production
  18. Ferroalloy Production
  19. Glass Production
  20. Zinc Production
  21. Titanium Dioxide Production
  22. Silicon Carbide Production
  23. Underground Coal Mines
  24. Hydrogen Production
  25. Electronics Manufacturing
  26. Fluorinated Gas Production
  27. Municipal Solid Waste Landfills
  28. HCFC22 Production/HFC23 Destruction
  29. Phosphoric Acid Production
  30. Nitric Acid Production
  31. Electrical Equipment Manufacturer and Refurbishment
  32. Electricity Generation
  33. General Stationary Fuel Combustion
  34. Petroleum and Natural Gas Systems: LNG Storage
  35. Petroleum and Natural Gas Systems: Local Distribution
  36. Petroleum and Natural Gas Systems: Onshore Production
  37. Industrial Wastewater Treatment
  38. Industrial Waste Landfills
  39. Electrical Transmission and Distribution
  40. Miscellaneous Uses of Carbonates

For the small number of facilites that report emissions from stationary fuel combustion and at least one other subpart where stationary fuel combustion is the highest ranked source on the above list, emissions from stationary combustion are attributed to a source category based on its NAICS code (ethanol plant, food processor, etc).

1 If a facility reports emissions from stationary fuel combustion and LNG storage, Fugitive emissions from local gas distribution or onshore oil and gas production, industrial wastewater treatment, industrial waste landfills, electrical transmission and distribution equipment or miscellaneous uses of carbonates then the reported emissions from stationary combustion are allocated to a sector based on the facility’s reported NAICS code.

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Source: This page was derived from th Data Publication Factsheet dated December 2011, updated 12/4/2013 per B. Cook

Approval / Publishing History: Version 2

Expiration : Factsheet was not final when this was extract, as soon as its final this should be updated

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