PHMSA

Definition

PHMSA - the Pipeline and Hazardous Materials Safety Administration - is the US Department of Transportation agency that writes the federal hazardous-materials regulations codified at 49 CFR Parts 100–185. PHMSA regulates classification, packaging, marking, labeling, placarding, shipping papers, and emergency response. Motor-carrier hazmat operations are regulated jointly by PHMSA (the materials side) and FMCSA (the carrier side). PHMSA also oversees pipeline safety. The hazmat regulations include the Hazardous Materials Table at 49 CFR §172.101, the packaging specifications at Part 178, and the training requirements at §172.704.