Who enforces HazMat Regulations in the United States?

• A. The U.S. Department of Transportation (PHMSA), with enforcement by federal and state authorities.
• B. Environmental Protection Agency (EPA).
• C. Federal Aviation Administration (FAA).
• D. Occupational Safety and Health Administration (OSHA).

Answer: (A)

Hazardous materials regulations are issued and overseen by the agency within the Department of Transportation that runs the Hazardous Materials Safety program. These rules—how hazmat must be classified, packaged, labeled, and shipped, along with training and emergency response requirements—are known as the Hazardous Materials Regulations. Enforcement isn’t left to a single federal agency alone; it’s carried out by PHMSA inspectors at the federal level and by state hazardous materials safety programs that operate under PHMSA’s authority. This shared enforcement structure explains the phrase “federal and state authorities.” Agencies like the EPA, FAA, and OSHA have important related roles in environmental protection, air transportation safety, and workplace safety, but they do not serve as the primary enforcers of hazmat shipping regulations across all transport modes.