An official website of the United States government.

We've made some changes to If the information you are looking for is not here, you may be able to find it on the EPA Web Archive or the January 19, 2017 Web Snapshot.

Gasoline Standards

Contact Us About Gasoline Standards

Report an environmental violation

Report a Violation

Report possible violations of environmental laws and regulations.

On this page:

Fuels Program Helpdesk

Email Fuels Program Helpdesk
Phone number 1-800-385-6164
Type of assistance
  • Registration
  • Program Regulations
  • Remedial Actions
  • Public data

CDX Helpdesk

Phone number 1-888-890-1995, then select Option 1
Type of assistance
  • CDX account password resets
  • Lexis/Nexis authentication
  • Updates to CDX account information

CDX Node Support

Phone number 1-888-890-1995, then select Option 2
Type of assistance
  • Setting up a new node
  • Acquiring a NAAS ID
  • Troubleshooting nodes
  • Failed node submissions

Fuels Program Mailing Addresses

US Postal Service*
Commercial Delivery 
(FedEx, UPS, etc.)

U.S. Environmental Protection Agency
Mail Code 6405A
1200 Pennsylvania Ave NW
Washington, DC 20460

U.S. Environmental Protection Agency
William Jefferson Clinton Building - North
Mail Code 6405A, Room 5512D; (202) 343-9038
1200 Pennsylvania Ave NW
Washington, DC 20004

*NOTE: Sending paperwork via US Postal Service will require an irradiation process and could possibly delay delivery.

Website Troubleshooting Contact Form

If you experience a technical error using this site or want to provide feedback on this site, please fill out the following form.

Please enter the word, "yes" if you're human.