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.

National Air Toxics Assessment

2011 NATA: Errata and Emissions Update

The following document, 2011 NATA Errata and Emissions Update Sheet, provides a list of some of the known issues and updates that were not addressed during the review of the 2011 NATA. Reviewing this file will provide a better understanding of the results and help in determining how best to use them.

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