National Emissions Inventory Process - FAQ
National Emissions Inventory Process frequently asked questions.
- Where are the NAICS/SIC and SCC codes changes that have been implemented for the 2017NEI?
- How often are the NEI data updated and how frequently are the data published?
- How complete are the data in the National Emissions Inventory?
- Where is more information available about emissions estimation methods used by the EPA?
- How are emissions trends compiled?