When should you perform a qualitative fit test of your respirator?

A qualitative fit test of your respirator should be performed whenever there is a significant change in the way the respirator fits on your face, which can happen due to factors such as a significant change in weight. When an individual gains or loses weight, the shape and contours of their face can change, affecting the seal of the respirator. A proper fit is essential for the respirator to provide effective protection against airborne contaminants.

Performing this test ensures that the respirator maintains an adequate seal. If the fit is compromised, contaminants could enter through gaps, thus defeating the purpose of wearing the respirator. Therefore, anyone who has experienced a notable change in weight should reevaluate their respirator fit and conduct a fit test to confirm safety and effectiveness in protecting against hazards encountered during pesticide application or other hazardous activities.