Please Note: Our e-mail address when we reply to you will show as "FMCSA Customer Service". To ensure timely and effective e-mail delivery, please check your spam folders and settings to allow e-mails from this address.

Hazardous Materials Regulations & Contacts

Published 11/02/2015 09:30 AM   |    Updated 05/05/2017 03:01 PM

For questions regarding transportation of hazardous materials, cylinders, scuba tanks, etc., please contact the US DOT's Office of Hazardous Materials Safety (HAZMAT). Contact information is as follows:

  • E-mail: infocntr@dot.gov
  • The toll-free phone number (in the U.S.): 1-800-HMR-4922 (1-800-467-4922)
  • The toll number, for Washington DC and/or foreign residents: 202-366-4488.

The hotline operates Monday through Friday from 9:00 am to 5:00 pm (ET).

To contact HAZMAT Regional offices, please click here.

For *IMMEDIATE EMERGENCY* notification of Hazardous Materials Incidents, please call the National Response Center (NRC):

  • 800-424-8802 (toll-free)
  • 202-267-2675 (toll)

To access HAZMAT regulations and interpretations, please see 49 CFR 171-185.

Was this answer helpful?
Your rating has been submitted, please tell us how we can make this answer more useful.

Print