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Hazardous Materials Information Center

1-800-HMR-4922
1-800-467-4922
For Washington, DC / Metro area residents: 202-366-4488

PHMSA (Pipeline and Hazardous Materials Safety Administration) operates the Hazardous Materials Information Center (HMIC) for help on use of the Hazardous Materials Regulations 49 CFR Parts 100-185. The phone number is menu driven when calling from a touch tone phone. Non-touch tone phone callers must use the telephone number 202-366-8553. Callers will be directed through an automated menu that provides options to:

  1. Obtain answers to questions on the Hazardous Materials Regulations 49 CFR Parts 100-185;
  2. Receive recent copies of Federal Register publications, copies of DOT special permits or letters of interpretation
  3. Receive copies of training material, such as Chart 12 or information packages;
  4. Report violations of the HMR;
  5. Leave a voice mail message concerning a question on the HMR (messages will be returned within 24 hours).

Callers needing assistance on questions relating to the HMR will be forwarded to the HMIC after selecting the correct menu item. Calls to the center are handled on a first call first answered manner through an automatic stacking system. The HMIC is open for direct calls from 9:00 am to 5:00 pm EST, however you may leave a message at any time, or you may email your question to the HMIC. Or you may write to:

Mr. Edward T. Mazzullo
Director, Office of Hazardous Materials Standards
U.S. DOT/PHMSA (PHH-10)
1200 New Jersey Avenue, SE East Building, 2nd Floor
Washington, DC 20590
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