Emission Inventory Code References

This page last reviewed March 13, 2013

Reference - The emission inventory uses a number of unique code systems to represent such things as industry and process type. Emission factors are used to calculate emissions, and are specific to individual pollutants and process types.

1. Code Tables:
   • INVENTORIES AND EMISSION FACTORS - U.S. EPA's Inventories and Emission Factors
   • SIC - U.S. OSHA's Standard Industry Classification
   • NAICS - U.S. Census Bureau Search Form for North American Industry Classification System Codes
   • EIC - ARB's Emission Inventory Code
   • Category Table- SIC/SCC to EIC/REIC combinations
2. Emission Factors:
   • AP-42 - U.S. EPA's Compilation of Emissions Factors
   • CATEF - California Air Toxic Emission Factors

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