The 2014 NATA Emissions Update document provides a list of some of the known issues and updates that were not addressed during the review of the 2014 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.- 2014 NATA Emissions Update document (PDF)(4 pp, 170 K, July 28, 2020)