Integrated Science Assessment (ISA) for Ozone and Related Photochemical Oxidants (External Review Draft, Sep 2019)
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Ozone (O3) is one of six principal (or criteria) pollutants for which EPA has established NAAQS. The Clean Air Act requires EPA to periodically review the scientific basis for these standards by preparing an Integrated Science Assessment (ISA). The ISA, 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. These reviews play a significant role in EPA’s commitment to ensuring a clean and healthy environment for the public.
|Jun 2018||EPA put out a call for scientific and policy relevant papers in preparation of developing an updated Integrated Review Plan (IRP) and an Integrated Science Assessment (ISA) as part of the 5- year review of the air quality criteria and the National Ambient Air Quality Standards (NAAQS) this one specific to Ozone (O3) and related photochemical oxidants. [Federal Register Jun 26, 2018]|
|Oct/Nov 2018||EPA held a series of webinar workshops to evaluate initial draft materials for the Integrated Science Assessment for Ozone and Related Photochemical Oxidants on October 29 and 31, 2018, and November 1 and 5, 2018.|
|Sep 2019||EPA released the document Integrated Science Assessment for Ozone and Related Photochemical Oxidants (External Review Draft) (EPA/600/R-19/093) for public review and comment.[Federal Register Sep 26, 2019]|
This download(s) is distributed solely for the purpose of pre-dissemination peer review under applicable information quality guidelines. It has not been formally disseminated by EPA. It does not represent and should not be construed to represent any Agency determination or policy.
Comments on the assessment may be submitted and reviewed using the Docket ID DOCKET-EPA-HQ-ORD-2018-0274