Which organization is responsible for issuing hazard class and divisions?

The organization responsible for issuing hazard classes and divisions is indeed the Department of Transportation (DOT). The DOT plays a crucial role in regulating the transportation of hazardous materials across the United States. It establishes guidelines for classifying various materials based on their chemical and physical properties, which is essential for ensuring safety during transport.

These hazard classes and divisions help in identifying the risks associated with transporting specific materials, facilitating proper handling, storage, and emergency response. By categorizing materials accurately, the DOT ensures compliance with federal regulations, thereby protecting public health and safety as well as the environment.

The Environmental Protection Agency (EPA) focuses more on the regulation of environmental hazards and pollutants rather than the specific classifications of hazardous materials in transportation. The United States Department of Agriculture (USDA) is concerned with agricultural products and related standards, while the National Highway Traffic Safety Administration (NHTSA) primarily deals with vehicle safety and does not have authority over hazardous materials classifications.