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 (Feb 11, 2011) (pdf) (578.82 KB)

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