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Renewable Fuel Standard Program

Fuels Programs Support

EPA Fuels Programs Support Line

  • Fuels programs questions; registration and reporting assistance
    EPA Fuels Programs Support (

Using EMTS

EMTS Technical Support (
(Monday through Friday 9:00 a.m. until 5:00 p.m. ET)

Establishing CDX Login

CDX Helpdesk (
1-888-890-1995, then select Option 1.

NAAS Authentication and Nodes

CDX Node Support (
1-888-890-1995, then select Option 2.