Carbon Monoxide (CO) Standards - Response to Comments from Current Review

This document presents the responses of the EPA to public comments received on the 2011 carbon monoxide NAAQS proposal notice (76 FR 8158).

• Responses to Significant Comments on the 2011 Proposed Rule on the National Ambient Air Quality Standards for Carbon Monoxide (February 11, 2011; 76 FR 8158) (PDF)(80 pp, 593 K, About PDF)

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