An official website of the United States government.

We've made some changes to If the information you are looking for is not here, you may be able to find it on the EPA Web Archive or the January 19, 2017 Web Snapshot.

Pesticide Worker Safety

Worker Protection Standard and Application Exclusion Zone Frequently Asked Questions

An application exclusion zone (AEZ) is the area surrounding pesticide application equipment that exists only during outdoor production pesticide applications. The AEZ requirements found in the Worker Protection Standard (WPS) establish minimum exclusion zones around ongoing pesticide applications that workers and other people must be kept out of on the agricultural establishment.

The following video provides a visual representation of an application AEZ. As the airplane moves across the field, or the area in green, the color changes to blue, indicating that the area has been treated and is subject to the restricted-entry interval (REI) specified on the pesticide product labeling and to the relevant Worker Protection Standard restrictions after applications.

This video provides a visual representation of an AEZ on field borders. To comply with WPS AEZ requirements you must suspend pesticide application if people are present. Then you must evaluate the situation and conditions and determine if you can resume the application without contacting anyone with the pesticide, either directly or through drift.

The documents below provide general guidance to help you comply with the AEZ requirements of the WPS for agricultural pesticides, 40 CFR part 170, as amended in 2015..

For complete information about the WPS rule requirements, refer to the final WPS rule.

Find additional information about the WPS.

For questions about how to comply with the WPS rule requirements, contact Richard Pont at

You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.