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  1. Home
  2. Fuels Registration, Reporting, and Compliance Help

Compliance Help Tools for Fuels Program

A messaging system for updates and changes.
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Regulations and Standards
  • Diesel Fuel Standards
  • Gasoline Standards
  • Renewable Fuel Standard Program
Related Information
  • Air enforcement
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On this page:
  • Searchable Help Index
  • Fuels Program Frequent Questions
  • Fuels Program Support Helpdesk
  • CDX Support Helpdesk
  • Mailing Addresses

Searchable Help Index

Use this search box to find any page within the "Fuels Registration, Reporting, and Compliance Help" site, including tutorials, documents, diagrams, and other resource materials. For best results, start with a broader search term and then use more specific terms if needed.

Fuels Program Frequent Questions

Browse or search the Knowledge Base for answers to frequently asked questions.

  • Frequent questions for Fuels Program

Fuels Program Support Helpdesk

Email: FuelsProgramSupport@epa.gov

Types of assistance:

  1. Registration Questions
    • Registering under 40 CFR Part 80 and 40 CFR Part 1090 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. Program Regulations Questions
    • Fuel regulations for EPA’s fuels programs
    • Public data (including RINs, ABT sulfur and benzene credits)
  3. Technical Support or Reporting Questions
    • EMTS technical support
    • Remedial actions

CDX Support Helpdesk

For help with CDX-related topics, including password resets and node assistance, please visit the following links:

  • Password reset
  • Forgot user ID
  • CDX Virtual Assistant (click on upper right tab)

If you need to contact the CDX Helpdesk directly, please call 1-888-890-1995 or email helpdesk@epacdx.net.

NOTE that CDX now offers self-service password resets via security questions and/or mobile device authentication.

Mailing Addresses

Fuels Program Mailing Addresses

Fuels Registration, Reporting, and Compliance Help

  • Registration
    • New Registrations
    • Updating Registrations
    • Jobs Aids
    • System Updates
  • Reporting
    • Attest Engagements
    • Diesel
    • Fuel and Fuel Additive Registrations (FFARs)
    • Gasoline
    • Renewable Fuel Standard (RFS)
  • Public Data & Registration Lists
    • Gasoline Programs
    • Part 79 Registered Fuels & Fuel Additives
    • Part 80 Registered Companies & Facilities
    • Renewable Fuel Standard
  • Help
    • Searchable Help Index
    • Fuels Program Frequent Questions
Contact Us about Fuels Registration, Reporting, and Compliance Help
Contact Us to ask a question, provide feedback, or report a problem.
Last updated on March 28, 2025
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