Integrated Science Assessment (ISA) for Ozone and Related Photochemical Oxidants (Final Report, Apr 2020)
NoticeEPA's announced the availability of the final Integrated Science Assessment for Ozone and Related Photochemical Oxidants in an April 20, 2020 Federal Register Notice.
EPA has established NAAQS for six criteria pollutants. Presently the EPA is reviewing the air quality criteria and NAAQS for photochemical oxidants and ozone; ozone is the current indicator for this NAAQS. Periodically, EPA reviews the scientific basis for these standards by preparing an Integrated Science Assessment (ISA). The ISA, in conjunction with additional technical and policy assessments, provides the policy relevant scientific information necessary to conduct a review 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]|
|Dec 2019||The Clean Air Scientific Advisory Committee (CASAC) convened at a public meeting on February 11-12, 2020 to review the draft Ozone ISA.|
|Feb 2020||EPA's Science Advisory Board (SAB) released the Draft CASAC Review of the EPA’s Integrated Science Assessment for Ozone and Related Photochemical Oxidants (External Review Draft – September 2019).|
|Apr 2020||EPA updated the ISA based on CASAC comments on the draft and released the final report.|
|Sep 2021||EPA re-posts the final assessment with an errata sheet of the update.|
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.