EPA Air Quality Documents
Access background information and a step-by-step guide for using critical loads for each topic below.
Air Quality Background Documents | |
NOx, SOx, & PM Secondary Air Quality Standards – ISA (Integrated Science Assessment) | a comprehensive evaluation and synthesis of the most policy relevant science aimed at characterizing the ecological effects caused by oxides of nitrogen, oxides of sulfur, and particulate matter |
Policy | |
Policy Assessment & REA (Risk and Exposure Assessment) – Final | presents the final policy assessment for the U.S. EPA’s current review of the secondary national ambient air quality standards (NAAQS) for oxides of nitrogen, oxides of sulfur and particulate matter (SOx and PM) |
Policy Assessment & REA (Risk and Exposure Assessment) – External Review Draft | presents the draft policy assessment for the U.S. EPA’s current review of the secondary national ambient air quality standards (NAAQS) for oxides of nitrogen, oxides of sulfur and particulate matter (SOx and PM) |
Clean Air Scientific Advisory Committee (CASAC) Comments | presents peer review comments on the draft policy assessment for the U.S. EPA’s current review of the secondary national ambient air quality standards (NAAQS) for oxides of nitrogen, oxides of sulfur and particulate matter (SOx and PM) |
Notice of Proposed Rulemaking | provides notice of the U.S. EPA’s proposal to revise the Secondary Air Quality Standard for NOx and SOx |
Nitrogen Dioxide (NO2) and Sulfur Dioxide (SO2) Secondary Air Quality Standards | provides background informaiton on the Secondary Air Quality Standard for NOx and SOx and includes policy documents of the current and past reviews |