Hazard Controls

Hazard controls prevent or reduce exposure to hazardous conditions. The most effective method is to eliminate the hazard so that no further control is necessary, although the elimination of all hazards is not always possible. The chart below illustrates the effectiveness of hazard control.

Examples of Hazard Controls


Redesign of a job or elimination of the substance removes the hazard.


Replace the material or process with a less hazardous option.


Install or use additional equipment to control the hazard. Separate the hazard from the operator by enclosing or guarding the dangerous machinery parts. For example, place guards on machines.


Policies and procedures that reduce the time the worker is exposed to the hazard. Examples include prohibit eating and drinking were hazardous chemicals are in use, use signs to warn of hazards, and proper training.

Personal Protective Equipment

Only after all the previous measures have been tried and found to be ineffective in controlling the hazards to a reasonably practicable level, then Personal Protective Clothing and Equipment must be used.


Resources for Hazard Controls

Hazard Control from Canadian Centre for Occupation Health and Safety
OSHA Hazards Prevention and Control from SHMS eTool