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National Ambient Air Quality Standards (NAAQS)

Carbon Monoxide (CO) Standards -
Documents from Previous Reviews

Information provided for informational purposes only Note: EPA no longer updates this information, but it may be useful for historical purposes. See the Carbon Monoxide Standards Home Page for documents from the current review of the Carbon Monoxide NAAQS.

Criteria Document

Exposure Assessment

Staff Paper

Federal Register Notices

CASAC Documents

File Utilities

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