An official website of the United States government.

This is not the current EPA website. To navigate to the current EPA website, please go to This website is historical material reflecting the EPA website as it existed on January 19, 2021. This website is no longer updated and links to external websites and some internal pages may not work. More information »

WPEM-Wall Paint Exposure Model: Version 3.2 User’s Guide

EPA’s Office of Pollution Prevention and Toxics (OPPT) Design for the Environment (DfE) project developed a wall paint exposure assessment model for interior latex and alkyd paints, in collaboration with the National Paints and Coatings Association (NPCA), paint manufacturers and chemical suppliers.

The purpose of the model is to allow industry product developers and health and safety officials to more easily and accurately identify chemicals in paint formulations that may pose potential exposure problems. It is envisioned that identification and/or evaluation of potentially problematic chemicals will be done by individual paint manufacturers and chemical suppliers during the design stage of paint development and/or during a product-stewardship effort to fully assess a current line of products.

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