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For questions or information regarding air emissions factors for criteria and hazardous air pollutants, contact info.chief@epa.gov.

For questions regarding the National Emissions Inventory (NEI) or the Emission Inventory System (EIS), please see the Emission Inventory System (EIS) webpage for a list of contacts by topic.


For questions regarding greenhouse gas inventories, please see the EPA's Climate Change web site.

For questions regarding air pollution health effects or trends in air pollution emissions, please see the Office of Air and Radiation Contact Us web page.

If you have a specific air quality problem or complaint, please use the Report Environmental Violations Web page to contact the EPA.

| Office of Air Quality Planning & Standards | Technology Transfer Network |
| Clearinghouse for Inventories & Emissions Factors |


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