We've made some changes to EPA.gov. 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.

Reviewing National Ambient Air Quality Standards (NAAQS)

Responses to Significant Comments on the 2014 Proposed Rule on the National Ambient Air Quality Standards for Ozone (December 17, 2014; 79 FR 75234)

This document, together with the preamble to the final rule on the review of the national ambient air quality standards for ozone (O3), presents the responses of the EPA to public comments received on the 2014 O3 NAAQS proposal notice (79 FR 75234).

You may also be interested in other documents from the current ozone NAAQS review.

You may need Adobe Reader to view files on this page. See EPA’s About PDF page to learn more.