In "The Standard System of the Identification of the Hazards of Materials for Emergency Response" (NFPA 704), which color indicates a health hazard?

In the NFPA 704 system, the color blue specifically indicates health hazards. This color coding is part of a standardized system that assists emergency responders in rapidly assessing the potential risks associated with hazardous materials. The blue section of the NFPA label typically features a numerical scale from 0 to 4, with higher numbers indicating more severe health risks. This allows firefighters and other emergency personnel to make informed decisions quickly when encountering hazardous materials during a response.

The other colors in the NFPA system serve different purposes: red represents flammability, yellow indicates reactivity, and white is used for specialized hazards such as radiation or corrosivity. Each piece of the NFPA label plays a crucial role in providing a clear and concise assessment of risks, enabling responders to prioritize their safety and operational effectiveness in potentially dangerous situations.