Nitrogen Dioxide (NO2) and Sulfur Dioxide (SO2) Secondary Standards - Policy Assessments from Current Review
The policy assessment (PA) presents a staff analysis of the scientific basis for policy options for consideration by senior EPA management prior to rulemaking. Such an evaluation of policy implications is intended to help ‘‘bridge the gap’’ between the Agency’s scientific assessments, presented in the integrated science assessment (ISA) and risk/exposure assessment (REA), and the judgments required of the EPA Administrator in determining whether it is appropriate to retain or revise the NAAQS.
- Policy Assessment for the Review of the Secondary NAAQS for Oxides of Nitrogen, Oxides of Sulfur and Particulate Matter (pdf)
- Amended Errata for the Policy Assessment for the Review of the Secondary National Ambient Air Quality Standards for Oxides of Nitrogen, Oxides of Sulfur and Particulate Matter (pdf)
- Errata for the Policy Assessment for the Review of the Secondary NAAQS for Oxides of Nitrogen, Oxides of Sulfur and Particulate Matter (pdf)
- Memoranda Associated with the Draft Policy Assessment, July 2023
- Draft Policy Assessment for the Review of the NAAQS for Oxides of Nitrogen, Oxides of Sulfur and Particulate Matter (pdf)