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Phone Helpdesk

All phone calls are directed to a voicemail system that offers a recorded set of menu options to better route questions. Parties will be able to choose from the following three options: 

1. Registration Questions
   • Registering under 40 CFR Part 80 fuel programs (including RFS, gasoline/Tier 3, diesel/ULSD fuel)
     • Company association requests
     • Responsible corporate officer requests
     • New company requests
     • Company update requests
   • Registering under 40 CFR Part 79 fuel and fuel additive registration program
2. Technical Support or Reporting Questions
   • EMTS technical support
   • CDX reporting issues
   • Remedial actions
3. Program Regulations Questions
   • Fuel regulations for EPA’s fuels programs
   • Public data (including RINs, ABT sulfur and benzene credits)

Please remember to include in the voicemail:

• Full name
• Company name
• EPA company ID (if available)
• Brief description of your issue
• Company request number or email helpdesk ticket number (if available)
• Email address (if you would like a written response)

Phone number: 1-800-385-6164

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Email Helpdesk

For written questions about registration or program regulations, please send an email to: FuelsProgramSupport@epa.gov.

• Registration Questions
  • Registering under 40 CFR Part 80 fuel programs (including RFS, gasoline/Tier 3, diesel/ULSD fuel) 
    • Company association requests
    • Responsible corporate officer requests
    • New company requests
    • Company update requests
  • Registering under 40 CFR Part 79 fuel and fuel additive registration program
• Program Regulation Questions
  • Fuel regulations for EPA’s fuels program
  • Public data (including RINs, ABT sulfur and benzene credits)

• Technical Support Questions
  • EMTS technical support
  • CDX reporting issues
  • CDX account updates
  • NAAS authentication
  • Remedial actions

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