CSU-Pueblo Alumni Association

NFPA Placards

It is required that each laboratory or work area where chemicals are used or stored be posted with the standard NFPA placard. The system is based on a color-coded warning with blue indicating health hazard, red indicating flammability, and yellow indicating reactivity. A numerical number is assigned to each color-coded area with a range from 0 to 4, the higher the number, the more hazardous the area. The highest number within each warning category for the chemicals present is posted on the placard.

NFPA Placards

4 = Severe Hazard
3 = Serious Hazard
2 = Moderate Hazard
1 = Slight Hazard
0 = Minimal Hazard
Special = Water ReactiveOxidizerCorrosive