Hazard and Risk Defined

Learn the essential difference between a hazard and a risk, understand why this distinction matters, and identify the true purpose of workplace risk assessment.

7 min

Activities: 0 of 3

Separating the Source from the Outcome

To assess safety effectively, you must separate what causes harm from how likely that harm is to happen.

A hazard is anything with the potential to cause harm. It is a physical object, substance, energy source, or working condition that exists in the workplace. Examples include an open pit, wet tiles, electricity, toxic steam, or repetitive lifting.

A risk is the chance—high or low—that somebody could be harmed by that hazard, together with an indication of how serious that harm could be. Risk takes the hazard and puts it into a specific working context.

In short:

Hazard: The source of potential injury or ill health (the what).
Risk: The likelihood of harm occurring combined with its potential severity (the what if).

Worked Workplace Examples

A 5-litre drum of solvent degreaser sits in a maintenance shop. The hazard is the chemical itself (it is toxic, flammable, and irritates the skin). If the drum is stored sealed in a locked, ventilated fire cabinet, the risk of poisoning or fire is very low. However, if the same drum is opened, left on a workbench next to an active angle grinder with sparks flying, the risk of fire is extremely high. The hazard remains unchanged; the risk changes completely based on exposure and control.

The Core Purpose of Risk Assessment

Many workers assume that the purpose of a risk assessment is legal compliance or creating an insurance paper trail. This is a common misconception.

The primary purpose of conducting a workplace risk assessment is to identify sensible and practical measures to protect people from harm. It exists to answer three direct questions:

What could cause an injury, illness, or equipment failure during this job?
How likely is it, and how bad could it be under our current setup?
What realistic actions must we take to eliminate the danger or lower the risk so people go home safe?

An assessment that simply lists hazards without leading to practical physical or operational controls fails in its basic purpose.

Common Pitfalls to Avoid

What would you do?

You are reviewing safety documentation for a bakery production line. On the draft assessment, the team leader has written under hazards: 'Third-degree burn to forearm'. How should this entry be corrected to reflect accurate terminology?

Match the Item to Its Correct Classification

Pair each workplace item with whether it represents a Hazard or a Risk.

Hydraulic oil puddle on a polished pedestrian walkway
The likelihood and severity of an order picker slipping on spilled oil and breaking their wrist
An unguarded rotating drill spindle in a machine shop
The probability that an operator's loose sleeve gets drawn into the spinning spindle

What is the primary, core purpose of conducting a workplace risk assessment?