What is the Re-Entry Interval (REI)?

The REI is the time immediately following a pesticide application when entry into the treated area is restricted. This is a legally enforceable restriction found on the product label, designed to protect workers from pesticide exposure.

Are there any exceptions to the REI?

Yes, but they are very specific. The EPA's Worker Protection Standard (WPS) allows for entry during an REI only under very limited circumstances, such as for short-term tasks that were unforeseeable, and requires specific PPE. Always consult the WPS and product label.

What if the label lists multiple REIs?

Some labels may have different REIs for different post-application activities (e.g., a shorter REI for scouting vs. a longer REI for hand-harvesting). You must always adhere to the REI for the specific task being performed.

Safe Re-Entry Interval Calculator

Determine the safe time to re-enter a treated area after pesticide application.

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