Exposure is defined as a measure of the amount of contact you have with pesticides, through contact with your skin, eyes, mouth, or nose.

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Exposure is about how much pesticide you come into contact with on or in your body. It focuses on contact through the surfaces that can take up the chemical—skin, eyes, mouth, or the nose—since these routes determine how much can enter your body and potentially cause harm. This captures the idea of a potential dose reaching you, rather than how toxic the chemical is, how fast it breaks down in the environment, or how much of the chemical is present in the air. The other concepts describe toxicity, environmental fate, or air concentration, which are different from the definition of exposure itself.