Fuels and Fuel Additives
Fuels Programs Support
Registration and Reporting
- EPA Fuels Programs Support Line
- email: EPAFuelsPrograms@epa.gov
- 1-202-343-9755
Using EMTS
- EMTS Technical Support
(Monday through Friday 9:00 a.m. until 5:00 p.m. ET)- email: support@epamts-support.com
- 1-800-385-6164
Establishing CDX Login
- CDX Helpdesk
- email: helpdesk@epacdx.net
- 1-888-890-1995, then select Option 1.
NAAS Authentication and Nodes
- CDX Node Support
- email: nodehelpdesk@epacdx.net
- 1-888-890-1995, then select Option 2.
If you have questions or request information, please contact the appropriate support or help line found on the Support & Help page.
Please visit EPA's Transportation and Air Quality web-based repository of mobile source documents, Document Index System (DIS). This searchable repository contains regulations, Federal Register notices, policy letters, and guidance documents.
Please visit our Related Links page for other fuel related information within EPA, other U.S. Agencies, and other fuel related websites.