Q. Hazardous Materials Contacts
Hazardous Materials Regulations & Contacts
You will need to speak directly with the Hazardous Materials Outreach of the PHMSA. You can find the contact information through the web page at: http://www.phmsa.dot.gov/about/contact
For questions regarding hazardous materials, cylinders, scuba tanks, etc., please contact the Office of Hazardous Materials Safety (HAZMAT). Contact information is as follows:
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 (EST).
To contact HAZMAT Regional offices, please click here.
For *IMMEDIATE EMERGENCY* notification of Hazardous Materials Incidents, please call the National Response Center (NRC):
To access HAZMAT regulations and interpretations, please see 49 CFR 171-185.
For questions concerning standards for CNG tanks/cylinders, please contact Luis Figueroa in the National Highway Traffic Safety Administration's Office of Vehicle Safety Compliance at Luis.Figueroa@dot.gov or (202) 366-5298.