National Ambient Air Quality Standards (NAAQS) for Carbon Monoxide (CO)
Rule Summary
In 2011, based on the Environmental Protection Agency's (EPA) review of the air quality criteria for CO, EPA issued a decision to retain the existing NAAQS for CO.
Rule History
08/31/2011 – Final Decision to Retain the NAAQS for CO
02/11/2011 – Proposed Decision to Retain the NAAQS for CO
Additional Resources
Fact Sheets and Additional Information Regarding the NAAQS for CO
Scientific and Technical Documents Supporting the NAAQS for CO