When should filters and cartridges on a respirator be changed?

The correct choice is based on the principle of ensuring safety and effectiveness when using a respirator, particularly in environments where pesticides are present. If a person can smell pesticides while wearing a respirator, it indicates that the filters or cartridges are no longer adequately functioning to remove harmful contaminants from the air. This exposure can pose significant health risks, making it crucial to change the filters and cartridges immediately upon detecting any pesticide odors.

Regular monitoring of the respirator's performance is key, as any sign of odor suggests that the protective barrier is compromised. In environments where pesticides are frequently used, maintaining a stringent regimen for changing filters and cartridges based on odor detection is essential for safeguarding health. While daily changes, weekly changes, or only changing when damaged may seem reasonable, they do not provide the immediate response required when contamination is detected.