Integrated Science Assessment for Carbon Monoxide (Final Report)

Carbon monoxide (CO) is one of six principal (or criteria) pollutants for which EPA has established NAAQS. Periodically, EPA reviews the scientific basis for these standards by preparing an Integrated Science Assessment (ISA) (formerly called an Air Quality Criteria Document). The ISA and supplementary annexes, in conjunction with additional technical and policy assessments, provide the scientific basis for EPA decisions on the adequacy of the current NAAQS and the appropriateness of possible alternative standards. The Clean Air Scientific Advisory Committee (CASAC), an independent science advisory committee whose existence and whose review and advisory functions are mandated by Section 109 (d) (2) of the Clean Air Act, is charged (among other things) with independent scientific review of EPA's air quality criteria.

The first and second drafts of the CO ISA were reviewed at public meetings of the CASAC CO Review Panel on May 12-13, 2009 and November 16-17, 2009, respectively. This final CO ISA has benefited from the expert comments received at the CASAC meetings and from public comments, and it has been revised accordingly.

This is the final document. Additional technical and policy assessment documents for this review are available from the Office of Air Quality Planning and Standards (http://www.epa.gov/ttn/naaqs/standards/co/s_co_index.html).

U.S. EPA. Integrated Science Assessment for Carbon Monoxide (Final Report). U.S. Environmental Protection Agency, Washington, DC, EPA/600/R-09/019F, 2010.