Which statement correctly defines hazard and risk?

Which statement correctly defines hazard and risk?

• A. Hazard is a source with potential for harm; risk is the probability and severity of that harm
• B. Risk is a source with potential for harm; hazard is the probability and severity
• C. Hazard and risk are synonyms
• D. Hazards relate only to chemical exposures

Answer: (A)

Hazard and risk are about different parts of safety thinking. A hazard is any source or situation with the potential to cause harm—think of a chemical, a piece of machinery, a wet floor, or a loud noise. Risk is about what happens when that potential is realized: the probability that harm occurs and how severe that harm would be. In other words, risk combines how likely exposure to the hazard is with how bad the harm would be if exposure occurs. This distinction matters in practice because a highly hazardous material can pose low risk if it’s well controlled and exposure is minimal, while a less hazardous thing can still present high risk if people are exposed frequently or the consequences are severe. Hazards aren’t limited to chemicals; they encompass any source of potential harm. Saying hazard and risk are the same thing isn’t accurate, since one is about the danger itself and the other about the chance and impact of that danger being realized.

Hazard and risk are about different parts of safety thinking. A hazard is any source or situation with the potential to cause harm—think of a chemical, a piece of machinery, a wet floor, or a loud noise. Risk is about what happens when that potential is realized: the probability that harm occurs and how severe that harm would be. In other words, risk combines how likely exposure to the hazard is with how bad the harm would be if exposure occurs.

This distinction matters in practice because a highly hazardous material can pose low risk if it’s well controlled and exposure is minimal, while a less hazardous thing can still present high risk if people are exposed frequently or the consequences are severe. Hazards aren’t limited to chemicals; they encompass any source of potential harm. Saying hazard and risk are the same thing isn’t accurate, since one is about the danger itself and the other about the chance and impact of that danger being realized.