Science Inventory

Integrated Science Assessment (ISA) for Carbon Monoxide (Second External Review Draft, Sep 2009)


EPA is announcing the release of the draft document, Integrated Science Assessment for Carbon Monoxide (Second External Review Draft) for public review and comment as described in the September 23, 2009 Federal Register Notice. Please see Additional Information for steps on providing comments. The deadline for submitting comments is Nov. 13, 2009.


U.S. EPA. Integrated Science Assessment (ISA) for Carbon Monoxide (Second External Review Draft, Sep 2009). U.S. Environmental Protection Agency, Washington, DC, EPA/600/R-09/019B, 2009.


Section 108(a) of the Clean Air Act directs the EPA Administrator to identify certain pollutants that “cause or contribute to air pollution which may reasonably be anticipated to endanger public health or welfare” and to issue air quality criteria for them. These air quality criteria are to “accurately reflect the latest scientific knowledge useful in indicating the kind and extent of all identifiable effects on public health or welfare which may be expected from the presence of such pollutant in the ambient air….” Under section 109 of the Act, EPA is to establish national ambient air quality standards (NAAQS) for each pollutant for which EPA has issued criteria. Section 109(d) of the Act requires periodic review and, if appropriate, revision of existing air quality criteria to reflect advances in scientific knowledge on the effects of the pollutant on public health or welfare. EPA is also to revise the NAAQS, if appropriate, based on the revised air quality criteria.


EPA announced that the Second External Review Draft of the Integrated Science Assessment (ISA) for Carbon Monoxide (CO) and related Annexes was made available for independent peer review and public review. This draft ISA document represents a concise synthesis and evaluation of the most policy-relevant science and will ultimately provide the scientific bases for EPA's decision regarding whether the current standards for CO sufficiently protect public health and the environment.


FR Notice: Sep 23, 2009   Exit

AGENCY RESPONSE   (PDF,2 pp, 438 KB,  about PDF)

CASAC Review of Carbon Monoxide - Project Page

Integrated Science Assessment for Carbon Monoxide - Second External Review Draft   (PDF,684 pp, 11587 KB,  about PDF)

Peer Review Plan   (PDF,NA pp, 35 KB,  about PDF)

CASAC Committees Final Report on the CO 2nd ERD   (PDF,57 pp, 270 KB,  about PDF)

Record Details:

Product Published Date: 09/18/2009
Record Last Revised: 04/04/2017
OMB Category: Highly Influential
Record ID: 213229